Crankshaft repair

[lyletrudell]

I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
I have rebuilt many cranks, but not Honda 600's.
A few ways to rebuild:
*Polish and new rollers.
*Grinding and sleeving.
*Spray welding and regrinding.
*Grind undersize & use oversize rollers.
*Make new rod pins and press in.....
I don't want to pull my engine apart, it's running fine, for now:)
Does anybody have a complete "bad" crank assembly they can send me?
I want to see if this is something that I could do.
It sounds like we have a good supply of re-buildable cores out there.
Then sort them into groups of problem areas and rebuild as required.
Cheaper way to save our motors.
?
Lyle

[blake neilson]

Those sound like good ideas, but in the case of the 600 finding repair parts (rollers in particular) would be the challenge.  As far as I know, Honda never sold any repair parts for the cranks.
Also, you don't have separate rod pins.  The 600 crank looks a lot like a set of 4 flywheels/counterweights with each rod flanked by two of them.  The rod pins are a part of the forging of the inner two flywheels and so cannot be pressed out and separated as a single part.
About 30 or so years ago I salvaged the best of two cranks. each having one bad rod.  A lot of work and time involved.  I might be a little hazy on some of the details such as which one of the flywheels included the rod pin but I'm quite sure of the fact that the pin cannot be completely separated.
GNB
--- On Fri, 5/7/10, lyletrudell wrote:

> From: lyletrudell
> Subject: [anzhonda600owners] Crankshaft repair
> To: anzhonda600owners@yahoogroups.com
> Date: Friday, May 7, 2010, 7:59 AM
> I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
> I have rebuilt many cranks, but not Honda 600's.
> A few ways to rebuild:
> *Polish and new rollers.
> *Grinding and sleeving.
> *Spray welding and regrinding.
> *Grind undersize & use oversize rollers.
> *Make new rod pins and press in.....
> I don't want to pull my engine apart, it's running fine, for now:)
> Does anybody have a complete "bad" crank assembly they can send me?
> I want to see if this is something that I could do.
> It sounds like we have a good supply of re-buildable cores out there.
> Then sort them into groups of problem areas and rebuild as required.
> Cheaper way to save our motors.
> ?
> Lyle

[Marshall]

Blake, You are certainly correct about about the rod pins being part of the forging. Pins are not a problem...... obtainable loose from many suppliers. It's going to have to be a sleeving job. I am going to have a bash at machining my own sleeve to size from EN31 bearing steel & hope I get the heat treatment correct.

--- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> Those sound like good ideas, but in the case of the 600 finding repair parts (rollers in particular) would be the challenge.  As far as I know, Honda never sold any repair parts for the cranks.
> Also, you don't have separate rod pins.  The 600 crank looks a lot like a set of 4 flywheels/counterweights with each rod flanked by two of them.  The rod pins are a part of the forging of the inner two flywheels and so cannot be pressed out and separated as a single part.
> About 30 or so years ago I salvaged the best of two cranks. each having one bad rod.  A lot of work and time involved.  I might be a little hazy on some of the details such as which one of the flywheels included the rod pin but I'm quite sure of the fact that the pin cannot be completely separated.
> GNB
> --- On Fri, 5/7/10, lyletrudell wrote:
> From: lyletrudell
> Subject: [anzhonda600owners] Crankshaft repair
> To:
anzhonda600owners@yahoogroups.com
> Date: Friday, May 7, 2010, 7:59 AM
> I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
> I have rebuilt many cranks, but not Honda 600's.
> A few ways to rebuild:
> *Polish and new rollers.
> *Grinding and sleeving.
> *Spray welding and regrinding.
> *Grind undersize & use oversize rollers.
> *Make new rod pins and press in.....
> I don't want to pull my engine apart, it's running fine, for now:)
> Does anybody have a complete "bad" crank assembly they can send me?
> I want to see if this is something that I could do.
> It sounds like we have a good supply of re-buildable cores out there.
> Then sort them into groups of problem areas and rebuild as required.
> Cheaper way to save our motors.
> ?
> Lyle

[Marshall]

Please read loose pins as rollers.... error on my part in the previous reply.

--- In
anzhonda600owners@yahoogroups.com
, "Marshall" wrote:
> Blake, You are certainly correct about about the rod pins being part of the forging. Pins are not a problem...... obtainable loose from many suppliers. It's going to have to be a sleeving job. I am going to have a bash at machining my own sleeve to size from EN31 bearing steel & hope I get the heat treatment correct.
> --- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> > Those sound like good ideas, but in the case of the 600 finding repair parts (rollers in particular) would be the challenge.  As far as I know, Honda never sold any repair parts for the cranks.
> > Also, you don't have separate rod pins.  The 600 crank looks a lot like a set of 4 flywheels/counterweights with each rod flanked by two of them.  The rod pins are a part of the forging of the inner two flywheels and so cannot be pressed out and separated as a single part.
> > About 30 or so years ago I salvaged the best of two cranks. each having one bad rod.  A lot of work and time involved.  I might be a little hazy on some of the details such as which one of the flywheels included the rod pin but I'm quite sure of the fact that the pin cannot be completely separated.
> > GNB
> > --- On Fri, 5/7/10, lyletrudell wrote:
> > From: lyletrudell
> > Subject: [anzhonda600owners] Crankshaft repair
> > To:
anzhonda600owners@yahoogroups.com
> > Date: Friday, May 7, 2010, 7:59 AM
> > I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
> > I have rebuilt many cranks, but not Honda 600's.
> > A few ways to rebuild:
> > *Polish and new rollers.
> > *Grinding and sleeving.
> > *Spray welding and regrinding.
> > *Grind undersize & use oversize rollers.
> > *Make new rod pins and press in.....
> > I don't want to pull my engine apart, it's running fine, for now:)
> > Does anybody have a complete "bad" crank assembly they can send me?
> > I want to see if this is something that I could do.
> > It sounds like we have a good supply of re-buildable cores out there.
> > Then sort them into groups of problem areas and rebuild as required.
> > Cheaper way to save our motors.
> > ?
> > Lyle

[lyletrudell]

Hi Marshall, bearing steel is nothing more than a medium carbon steel. The sleeve can be made from any high carbom steel.
A-2 is a good choice because it is an air hardening steel and can be machined easily. Heat treat and temper to 55-60Rc. Then maybe allow a .0015" press, and grind OD. Not sure what you have for equipment.
Lyle

--- In
anzhonda600owners@yahoogroups.com
, "Marshall" wrote:
> Blake, You are certainly correct about about the rod pins being part of the forging. Pins are not a problem...... obtainable loose from many suppliers. It's going to have to be a sleeving job. I am going to have a bash at machining my own sleeve to size from EN31 bearing steel & hope I get the heat treatment correct.
> --- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> > Those sound like good ideas, but in the case of the 600 finding repair parts (rollers in particular) would be the challenge.  As far as I know, Honda never sold any repair parts for the cranks.
> > Also, you don't have separate rod pins.  The 600 crank looks a lot like a set of 4 flywheels/counterweights with each rod flanked by two of them.  The rod pins are a part of the forging of the inner two flywheels and so cannot be pressed out and separated as a single part.
> > About 30 or so years ago I salvaged the best of two cranks. each having one bad rod.  A lot of work and time involved.  I might be a little hazy on some of the details such as which one of the flywheels included the rod pin but I'm quite sure of the fact that the pin cannot be completely separated.
> > GNB
> > --- On Fri, 5/7/10, lyletrudell wrote:
> > From: lyletrudell
> > Subject: [anzhonda600owners] Crankshaft repair
> > To:
anzhonda600owners@yahoogroups.com
> > Date: Friday, May 7, 2010, 7:59 AM
> > I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
> > I have rebuilt many cranks, but not Honda 600's.
> > A few ways to rebuild:
> > *Polish and new rollers.
> > *Grinding and sleeving.
> > *Spray welding and regrinding.
> > *Grind undersize & use oversize rollers.
> > *Make new rod pins and press in.....
> > I don't want to pull my engine apart, it's running fine, for now:)
> > Does anybody have a complete "bad" crank assembly they can send me?
> > I want to see if this is something that I could do.
> > It sounds like we have a good supply of re-buildable cores out there.
> > Then sort them into groups of problem areas and rebuild as required.
> > Cheaper way to save our motors.
> > ?
> > Lyle

[lyletrudell]

Not sure what the most common crank problem is, probably the main bearings. If the rod pin is the problem you can always cut it off and drill and bore thru for a new pin, Have a couple ideas for fixing them, The same way we do racing Go-Kart cranks.
Again to do one crank at a time is expensive.
We need old bad cores.
Lyle

--- In
anzhonda600owners@yahoogroups.com
, "lyletrudell" wrote:
> Hi Marshall, bearing steel is nothing more than a medium carbon steel. The sleeve can be made from any high carbom steel.
> A-2 is a good choice because it is an air hardening steel and can be machined easily. Heat treat and temper to 55-60Rc. Then maybe allow a .0015" press, and grind OD. Not sure what you have for equipment.
> Lyle
> --- In
anzhonda600owners@yahoogroups.com
, "Marshall" wrote:
> > Blake, You are certainly correct about about the rod pins being part of the forging. Pins are not a problem...... obtainable loose from many suppliers. It's going to have to be a sleeving job. I am going to have a bash at machining my own sleeve to size from EN31 bearing steel & hope I get the heat treatment correct.
> > --- In
anzhonda600owners@yahoogroups.com
, blake neilson wrote:
> > > Those sound like good ideas, but in the case of the 600 finding repair parts (rollers in particular) would be the challenge.  As far as I know, Honda never sold any repair parts for the cranks.
> > > Also, you don't have separate rod pins.  The 600 crank looks a lot like a set of 4 flywheels/counterweights with each rod flanked by two of them.  The rod pins are a part of the forging of the inner two flywheels and so cannot be pressed out and separated as a single part.
> > > About 30 or so years ago I salvaged the best of two cranks. each having one bad rod.  A lot of work and time involved.  I might be a little hazy on some of the details such as which one of the flywheels included the rod pin but I'm quite sure of the fact that the pin cannot be completely separated.
> > > GNB
> > > --- On Fri, 5/7/10, lyletrudell wrote:
> > > From: lyletrudell
> > > Subject: [anzhonda600owners] Crankshaft repair
> > > To:
anzhonda600owners@yahoogroups.com
> > > Date: Friday, May 7, 2010, 7:59 AM
> > > I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
> > > I have rebuilt many cranks, but not Honda 600's.
> > > A few ways to rebuild:
> > > *Polish and new rollers.
> > > *Grinding and sleeving.
> > > *Spray welding and regrinding.
> > > *Grind undersize & use oversize rollers.
> > > *Make new rod pins and press in.....
> > > I don't want to pull my engine apart, it's running fine, for now:)
> > > Does anybody have a complete "bad" crank assembly they can send me?
> > > I want to see if this is something that I could do.
> > > It sounds like we have a good supply of re-buildable cores out there.
> > > Then sort them into groups of problem areas and rebuild as required.
> > > Cheaper way to save our motors.
> > > ?
> > > Lyle

[blake neilson]

Regarding the weak link of these cranks, I only have knowledge of the two cranks I combined as previously mentioned.  The crank does have a total of four main bearings, the extra one being necessary since the cam chain drive is in the middle of the center main, so the mains are very well supported.
I would venture that the rod bearing is the weak link.  Just my opinion.  I have contemplated doing just what you suggested.  I no longer have access to the machine tools necessary however.
GNB

--- On
Sat, 5/8/10, lyletrudell

wrote:
> From: lyletrudell
> Subject: [anzhonda600owners] Re: Crankshaft repair
> To:
> anzhonda600owners@yahoogroups.com
> Date: Saturday, May 8, 2010, 10:56 PM
> Not sure what the most common crank problem is, probably the main bearings. If the rod pin is the problem you can always cut it off and drill and bore thru for a new pin, Have a couple ideas for fixing them, The same way we do racing Go-Kart cranks.
> Again to do one crank at a time is expensive.
> We need old bad cores.
> Lyle
> --- In
> anzhonda600owners@ yahoogroups. com
> , "lyletrudell" wrote:
> > Hi Marshall, bearing steel is nothing more than a medium carbon steel. The sleeve can be made from any high carbom steel.
> > A-2 is a good choice because it is an air hardening steel and can be machined easily. Heat treat and temper to 55-60Rc. Then maybe allow a .0015" press, and grind OD. Not sure what you have for equipment.
> > Lyle
> > --- In
> anzhonda600owners@ yahoogroups. com
> , "Marshall" wrote:
> > > Blake, You are certainly correct about about the rod pins being part of the forging. Pins are not a problem..... . obtainable loose from many suppliers. It's going to have to be a sleeving job. I am going to have a bash at machining my own sleeve to size from EN31 bearing steel & hope I get the heat treatment correct.
> > > --- In
> anzhonda600owners@ yahoogroups. com
> , blake neilson wrote:
> > > > Those sound like good ideas, but in the case of the 600 finding repair parts (rollers in particular) would be the challenge.�  As far as I know, Honda never sold any repair parts for the cranks.
> > > > Also, you don't have separate rod pins.�  The 600 crank looks a lot like a set of 4 flywheels/counterwe ights with each rod flanked by two of them.�  The rod pins are a part of the forging of the inner two flywheels and so cannot be pressed out and separated as a single part.
> > > > About 30 or so years ago I salvaged the best of two cranks. each having one bad rod.�  A lot of work and time involved.�  I might be a little hazy on some of the details such as which one of the flywheels included the rod pin but I'm quite sure of the fact that the pin cannot be completely separated.
> > > > GNB
> > > > --- On Fri, 5/7/10, lyletrudell wrote:
> > > > From: lyletrudell
> > > > Subject: [anzhonda600owners] Crankshaft repair
> > > > To:
> anzhonda600owners@ yahoogroups. com
> > > > Date: Friday, May 7, 2010, 7:59 AM
> > > > �
> > > > I was reading from past posts that the crank is one of the weakest parts of the engine. Probable lack of oil or over heating.
> > > > I have rebuilt many cranks, but not Honda 600's.
> > > > A few ways to rebuild:
> > > > *Polish and new rollers.
> > > > *Grinding and sleeving.
> > > > *Spray welding and regrinding.
> > > > *Grind undersize & use oversize rollers.
> > > > *Make new rod pins and press in.....
> > > > I don't want to pull my engine apart, it's running fine, for now:)
> > > > Does anybody have a complete "bad" crank assembly they can send me?
> > > > I want to see if this is something that I could do.
> > > > It sounds like we have a good supply of re-buildable cores out there.
> > > > Then sort them into groups of problem areas and rebuild as required.
> > > > Cheaper way to save our motors.
> > > > ?
> > > > Lyle

[friend]

Lyle;
The lower end of the rod has many rollers (needle bearings) in an aluminum cage.  What are you using to replace the bearing cage?
Bill

> -----Original Message-----
> From:
> anzhonda600owners@yahoogroups.com
> [mailto:anzhonda600owners@yahoogroups.com]
> On Behalf Of
> lyletrudell
> Sent:
> Saturday, May 08, 2010 10:30 PM
> To:
> anzhonda600owners@yahoogroups.com
> Subject:
> [anzhonda600owners] Re:
> Crankshaft repair
> Hi Marshall, bearing steel is nothing more than a medium carbon steel. The > sleeve can be made from any high carbom steel.
> A-2 is a good choice because
> it is an air hardening steel and can be machined easily. Heat treat and temper > to 55-60Rc. Then maybe allow a .0015" press, and grind OD. Not sure what you > have for equipment.
> Lyle
> --- In
> anzhonda600owners@ yahoogroups. com
> ,
> "Marshall" wrote:
> > Blake, You are
> certainly correct about about the rod pins being part of the forging. Pins are > not a problem..... . obtainable loose from many suppliers. It's going to > have to be a sleeving job. I am going to have a bash at machining my own > sleeve to size from EN31 bearing steel & hope I get the heat treatment > correct.
> > --- In
> anzhonda600owners@ yahoogroups. com
> ,
> blake neilson wrote:
> Those sound like good ideas, but in the case of the 600 finding repair parts > (rollers in particular) would be the challenge.�  As far as I know, Honda > never sold any repair parts for the cranks.
> > > Also,
> you don't have separate rod pins.�  The 600 crank looks a lot like a set > of 4 flywheels/counterwe ights with each rod flanked by two of > them.�  The rod pins are a part of the forging of the inner two flywheels > and so cannot be pressed out and separated as a single part.
> > > About 30 or so years ago I salvaged the best of two cranks. each > having one bad rod.�  A lot of work and time involved.�  I might be > a little hazy on some of the details such as which one of the flywheels > included the rod pin but I'm quite sure of the fact that the pin cannot be > completely separated.
> > > GNB
> > > ---
> On Fri, 5/7/10, lyletrudell wrote:
> > > From: lyletrudell
> Subject: [anzhonda600owners] Crankshaft repair
> > > To:
> anzhonda600owners@ yahoogroups. com
> > Date: Friday, May 7, 2010, 7:59 AM
> �
> > > I was
> reading from past posts that the crank is one of the weakest parts of the > engine. Probable lack of oil or over heating.
> > > I
> have rebuilt many cranks, but not Honda 600's.
> > > A
> few ways to rebuild:
> > > *Polish and new rollers.
> > > *Grinding and sleeving.
> *Spray welding and regrinding.
> > > *Grind undersize
> & use oversize rollers.
> > > *Make new rod pins and
> press in.....
> > > I don't want to pull my engine apart,
> it's running fine, for now:)
> > > Does anybody have a
> complete "bad" crank assembly they can send me?
> > > I
> want to see if this is something that I could do.
> It sounds like we have a good supply of re-buildable cores out there.
> > > Then sort them into groups of problem areas and rebuild as > required.
> > > Cheaper way to save our motors.
> > > ?
> > > Lyle

[lyletrudell]

Bill, I didn't get that far yet.
So the bearings are not available either? This is one tough car to rebuild!
The rollers should not be a problem.
But the cage will! I would hate to have to make them.
I am sure you guys have searched for other caged bearings.
Bill can you give me some info:
*Main crank Diameter
*ID of the outer sleeve
*roller dia, length & number of pins
*Cage length
I can check some of my sources.
Lyle

--- In
anzhonda600owners@yahoogroups.com
, wrote:
> Lyle;
> The lower end of the rod has many rollers (needle bearings) in an
> aluminum cage. What are you using to replace the bearing cage?
> Bill
> -----Original Message-----
> From:
anzhonda600owners@yahoogroups.com
> [mailto:
anzhonda600owners@yahoogroups.com
]On Behalf Of lyletrudell
> Sent: Saturday, May 08, 2010 10:30 PM
> To:
anzhonda600owners@yahoogroups.com
> Subject: [anzhonda600owners] Re: Crankshaft repair
> Hi Marshall, bearing steel is nothing more than a medium carbon steel. The
> sleeve can be made from any high carbom steel.
> A-2 is a good choice because it is an air hardening steel and can be
> machined easily. Heat treat and temper to 55-60Rc. Then maybe allow a .0015"
> press, and grind OD. Not sure what you have for equipment.
> Lyle
> --- In
anzhonda600owners@yahoogroups.com
, "Marshall" wrote:
> > Blake, You are certainly correct about about the rod pins being part of
> the forging. Pins are not a problem...... obtainable loose from many
> suppliers. It's going to have to be a sleeving job. I am going to have a
> bash at machining my own sleeve to size from EN31 bearing steel & hope I get
> the heat treatment correct.
> > --- In
anzhonda600owners@yahoogroups.com
, blake neilson
> wrote:
> > > Those sound like good ideas, but in the case of the 600 finding repair
> parts (rollers in particular) would be the challenge.� As far as I know,
> Honda never sold any repair parts for the cranks.
> > > Also, you don't have separate rod pins.� The 600 crank looks a lot
> like a set of 4 flywheels/counterweights with each rod flanked by two of
> them.� The rod pins are a part of the forging of the inner two flywheels
> and so cannot be pressed out and separated as a single part.
> > > About 30 or so years ago I salvaged the best of two cranks. each
> having one bad rod.� A lot of work and time involved.� I might be a little
> hazy on some of the details such as which one of the flywheels included the
> rod pin but I'm quite sure of the fact that the pin cannot be completely
> separated.
> > > GNB
> > > --- On Fri, 5/7/10, lyletrudell wrote:
> > > From: lyletrudell
> > > Subject: [anzhonda600owners] Crankshaft repair
> > > To:
anzhonda600owners@yahoogroups.com
> > > Date: Friday, May 7, 2010, 7:59 AM
> > > �
> > > I was reading from past posts that the crank is one of the weakest
> parts of the engine. Probable lack of oil or over heating.
> > > I have rebuilt many cranks, but not Honda 600's.
> > > A few ways to rebuild:
> > > *Polish and new rollers.
> > > *Grinding and sleeving.
> > > *Spray welding and regrinding.
> > > *Grind undersize & use oversize rollers.
> > > *Make new rod pins and press in.....
> > > I don't want to pull my engine apart, it's running fine, for now:)
> > > Does anybody have a complete "bad" crank assembly they can send me?
> > > I want to see if this is something that I could do.
> > > It sounds like we have a good supply of re-buildable cores out there.
> > > Then sort them into groups of problem areas and rebuild as required.
> > > Cheaper way to save our motors.
> > > ?
> > > Lyle

[Marshall]

Lyle, En31 is classed as a high carbon steel I thought. I will look into A-2 Many thanks for the added info relating to sleeving. I have access to all equipment required to machine & grind. I gave some thought to grinding an existing suitably sized bearing housing. Would you think that is worth consideration ? Nothing to lose really , exept the time involved ! Marshall.

--- In
anzhonda600owners@yahoogroups.com
, "lyletrudell" wrote:
> Bill, I didn't get that far yet.
> So the bearings are not available either? This is one tough car to rebuild!
> The rollers should not be a problem.
> But the cage will! I would hate to have to make them.
> I am sure you guys have searched for other caged bearings.
> Bill can you give me some info:
> *Main crank Diameter
> *ID of the outer sleeve
> *roller dia, length & number of pins
> *Cage length
> I can check some of my sources.
> Lyle
> --- In
anzhonda600owners@yahoogroups.com
, wrote:
> > Lyle;
> > The lower end of the rod has many rollers (needle bearings) in an
> > aluminum cage. What are you using to replace the bearing cage?
> > Bill
> > -----Original Message-----
> > From:
anzhonda600owners@yahoogroups.com
> > [mailto:
anzhonda600owners@yahoogroups.com
]On Behalf Of lyletrudell
> > Sent: Saturday, May 08, 2010 10:30 PM
> > To:
anzhonda600owners@yahoogroups.com
> > Subject: [anzhonda600owners] Re: Crankshaft repair
> > Hi Marshall, bearing steel is nothing more than a medium carbon steel. The
> > sleeve can be made from any high carbom steel.
> > A-2 is a good choice because it is an air hardening steel and can be
> > machined easily. Heat treat and temper to 55-60Rc. Then maybe allow a .0015"
> > press, and grind OD. Not sure what you have for equipment.
> > Lyle
> > --- In
anzhonda600owners@yahoogroups.com
, "Marshall" wrote:
> > > Blake, You are certainly correct about about the rod pins being part of
> > the forging. Pins are not a problem...... obtainable loose from many
> > suppliers. It's going to have to be a sleeving job. I am going to have a
> > bash at machining my own sleeve to size from EN31 bearing steel & hope I get
> > the heat treatment correct.
> > > --- In
anzhonda600owners@yahoogroups.com
, blake neilson
> > wrote:
> > > > Those sound like good ideas, but in the case of the 600 finding repair
> > parts (rollers in particular) would be the challenge.� As far as I know,
> > Honda never sold any repair parts for the cranks.
> > > > Also, you don't have separate rod pins.� The 600 crank looks a lot
> > like a set of 4 flywheels/counterweights with each rod flanked by two of
> > them.� The rod pins are a part of the forging of the inner two flywheels
> > and so cannot be pressed out and separated as a single part.
> > > > About 30 or so years ago I salvaged the best of two cranks. each
> > having one bad rod.� A lot of work and time involved.� I might be a little
> > hazy on some of the details such as which one of the flywheels included the
> > rod pin but I'm quite sure of the fact that the pin cannot be completely
> > separated.
> > > > GNB
> > > > --- On Fri, 5/7/10, lyletrudell wrote:
> > > > From: lyletrudell
> > > > Subject: [anzhonda600owners] Crankshaft repair
> > > > To:
anzhonda600owners@yahoogroups.com
> > > > Date: Friday, May 7, 2010, 7:59 AM
> > > > �
> > > > I was reading from past posts that the crank is one of the weakest
> > parts of the engine. Probable lack of oil or over heating.
> > > > I have rebuilt many cranks, but not Honda 600's.
> > > > A few ways to rebuild:
> > > > *Polish and new rollers.
> > > > *Grinding and sleeving.
> > > > *Spray welding and regrinding.
> > > > *Grind undersize & use oversize rollers.
> > > > *Make new rod pins and press in.....
> > > > I don't want to pull my engine apart, it's running fine, for now:)
> > > > Does anybody have a complete "bad" crank assembly they can send me?
> > > > I want to see if this is something that I could do.
> > > > It sounds like we have a good supply of re-buildable cores out there.
> > > > Then sort them into groups of problem areas and rebuild as required.
> > > > Cheaper way to save our motors.
> > > > ?
> > > > Lyle