Re: [2cylinderhondas] Anyone running the Arias pistons from O'Connor

[Bill]

So, what does Mike say?

[Bill]

Hi Scott;
    I would check the ring gap.  If the pistons are already in the cylinders this will meaning pulling them out and removing the rings unless the shop that did the work gave you specs.  Going back and redoing the bore will mean new rings.

[Jonathan Salgado]

You need to use arias specs. Honda has there specs, for their parts. But the pistons are not Honda.
When all else fails, contact the manufacturer.

On May 9, 2014 8:50 PM, "'Bill'
billmyong@...
[anzhonda600owners]" wrote:
> �
> Hi Scott;
> �
> ��� I would check the ring gap.� If
> the pistons are already in the cylinders this will meaning pulling them out and > removing the rings unless the shop that did the work gave you specs.� Going > back and redoing the bore will mean new rings.�
> From:
> 2cylinderhondas@yahoogroups.com
> [mailto:
> 2cylinderhondas@yahoogroups.com
> ]
> Sent:
> Friday, May 09, 2014
> 5:31 PM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] Anyone running the Arias pistons from
> O'Connor's?
> �
> I'm primarily curious if people have generally away with running > 0.0012" > on these. Failing that, I am interested in what's recommended > and you're > right that I could ask Mike about that.
> Thanks,
> -scott
> On
> 5/9/14, 'Bill'
> billmyong@...
> [2cylinderhondas]
> 2cylinderhondas@yahoogroups.com
> > wrote:
> > So,
> what does Mike say?
> > _____
> > From:
> 2cylinderhondas@yahoogroups.com
> [mailto:
> 2cylinderhondas@yahoogroups.com
> ]
> > Sent: Friday, May 09, 2014 4:41
> PM
> > To:
> 2cylinderhondas@yahoogroups.com
> > Subject:
> [2cylinderhondas] Anyone running the Arias pistons from
> O'Connor's?
> > Hi all,
> > I
> have some new pistons care of O'Connor's
> http://honda600shop.com
> .
> > They're Arias customs:
> http://ariaspistons.com
> .
> > I had the cylinders rebored, but one
> thing I missed is that Arias pistons
> > are
> > forged, not cast, and
> forged pistons specify more cylinder to piston
> clearance.
> > Anyone on here running pistons from
> O'Connor's?
> > What did you do in terms of cylinder to piston
> clearance?
> > Anyone running factory spec (0.0012") clearance with
> those?
> > I ordered 1mm oversized (per previous discussion) and had > the cylinders > > rebored to match. I missed this though:
> http://ariaspistons.com/pdf/motorcycle-installation.pdf
> > Arias
> recommends 0.003" clearance versus Honda's specified 0.0012".
> When I had it rebored, I gave the machine shop a copy of the factory
> specs page from the service manual so I'm guessing that it's to Honda's
> specs, not Arias'.
> > I found this explanation of the problem here,
> which claims that forged
> > pistons tend to distort, especially if not
> carefully broken in:
> http://www.hardcoresledder.com/forums/2 ... le-piston-
> info-forged-vs-cast.html
> > Maybe suggesting that I'm okay is this
> FAQ by another forged piston
> > maker, which says that 0.001" min is fine
> for 3.000-3.624" bore, and
> > larger bores require more
> clearance:
> http://www.probeindustries.com/Articles.asp?ID=161
> > 75mm (74 + 1)
> works out to about 2.9".
> > The pistons are installed in the
> cylinders and I'm in the process of
> > bolting things down and *then* I
> decided to start researching more and
> > doubling checking
> things.
> > Insights and experiences welcome!
> Thanks,
> > -scott