Bill
> -----Original Message-----
> From:
> 2cylinderhondas@yahoogroups.com [mailto:2cylinderhondas@yahoogroups.com] > On > Behalf Of > twincarb600 > Sent:
> Monday, October 29, 2007 5:54
> PM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> [2cylinderhondas] Re: European engine (or twin carb :-)
> Well here is the true about the twincarb 600. Honda never made a
> production dual carb 600. Long ago back in the 70's or 80's there > was > report of a racing dual carb top end from Mike Kefurt in North > Hollywood > CA. I personally saw the setup that he had and I kind of > questioned it > when i saw it in the early 80's. Kefurt wanted > $1200.00 back then for this > special top end. At the time I didn't > have enough information as to > weather it was real and or the money to > purchase it from him. Over the > years of collecting different manuals > from all over the world I have never > come across anything that states > that one was ever produced. What I have > is truly a 360 head and the > beginnings of modification to use on a 600 > motor. The 360 motors in > japan have a different oiling passages than what > is used by the 600 > motors. Someone at some time started to convert the > original 600 > lower cases and cylinders for the correct oiling that this > head > needs. I kind of have a feeling that this head and rest of the motor
> was what I saw when Kefurt had it. It appears that nobody ever
> completed this project and some time I plan on doing so. As far as > the > bolt pattern goes there is no difference between the 360 and 600 > engine, > it is only the oil passages that are different. the oil > comes up from the > lower end in a separate hole insteaded of the rear > head bolts. The > cylinders that came with this motor have already > been moded for these > extra holes. Something that also is done in > Japan is to knock the sleeves > out of the cylinders and put 74mm > sleeves and piston in place. What they > end up using is the stock > 74mm 600 piston and machine the dome to fit the > combustion camber of > the 360 head. I also have a set of those pstons as > well. Something > else that was made up for this motor was a cam with an > adjustable > sprocket. This way when the head gets milled you can adjust out > the > cam timing to keep the valves timed out properly. I have seen with
> the 360 punched out to 500 cc and different carbs added to it push
> around 90hp. They also twist the crankshafts on them and call them > 180 > cranks as well. Maybe some day I'll get time to finish what some > one > started and maybe twist a crank for this motor as well. I'll see > about > adding the picture of the pistons to the photo page.
> Robert
> ---
> In
> 2cylinderhondas@ yahoogroups. com
> ,
> Micka�l wrote:
> > It's really a twin
> carb head for 600 or a modified 360 twin carb
> head?
> > I've compare
> the heads and the head bolts place are different.
> > Can you compare
> camshaft housing gasket?
> http://autos. ph.groups. yahoo.com/ group/2cylinderh ondas/photos/ view/687 > 2?
> b=2
> > any picture of cambers?
> > Thanks
> > --- In
> 2cylinderhondas@ yahoogroups. com
> ,
> "Miles" wrote:
> > > And just for your
> information, I had the chance to buy a Twin
> Carb
> > > 600cc
> engine and passed on it because the owner wanted me to take > all
> > the junked out cars & parts and wouldn't just let me have the
> engine.
> > > Our group member, user name
> twincarb600, was able to buy that
> same
> > > engine, there is or
> was pics of it in the Photos section.
> Miles