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Charcoal
 Post subject: S2 bore clearance
PostPosted: Fri Mar 02, 2012 7:56 am 
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Joined: Sun Jul 17, 2011 4:14 pm
Posts: 161
Location: Syracuse,NY
Hi all,
The old books are giving me some conflicting info in regards to setting bore clearances on an over bore for my 350 s2. Pistons are cast Kawi NOS. Any suggestions?
Thanks

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RODH2
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 8:05 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4612
Location: Milang, South Australia
To get the ball rolling, .002", but check with others! (Measure at the correct place!)

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tripletriplenut
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 8:44 am 
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Joined: Thu Jun 09, 2011 8:31 am
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Location: sault, canada
.00106" to .00138"
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RODH2
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 8:47 am 
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Location: Milang, South Australia
Oooh, that's tight, but then I am a H2 man! Anyone else?

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Ja-Moo
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 8:50 am 
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Location: Rio Rancho, New Mexico
tripletriplenut wrote:
.00106" to .00138"


I wouldn't of believed it, if it wasn't in the factory manual! :o

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tripletriplenut
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 8:52 am 
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Joined: Thu Jun 09, 2011 8:31 am
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Location: sault, canada
thats what i have my 350 set at the 250 is even tighter .00047 to.00079"
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RODH2
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 8:59 am 
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Location: Milang, South Australia
^ Now that is fr****g tight! Wouldn't have believed it, but there you go! What temp was it that day! :lol:

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Charcoal
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 9:32 am 
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Joined: Sun Jul 17, 2011 4:14 pm
Posts: 161
Location: Syracuse,NY
This is great stuff and Thanks guys! !
Last year I put .001" clearance into the tiny 45mm S1 bores -- it ran nice and quie and happily tolerated regular floggings w/o ever squeeking.

Also,.. last year, I got into a somewhat heater discussion w my boring guy about where the piston should be measured. Does the Kawi bible refer to this as well?

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RODH2
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 9:39 am 
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Location: Milang, South Australia
It does, but I'd have to look it up (How far up from the bottom). Actually, I feel better about running .002" on my big H2 pistons, now, but I guess you can learn something every day! It will still rattle tho! (H2 that is!) :lol:

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H2RTuner
 Post subject: Re: S2 bore clearance
PostPosted: Fri Mar 02, 2012 12:04 pm 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 3162
.0015 inch for stock cast pistons (one and a half thousandths).
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