entropy
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Posts: 8671
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posted July 29, 2006 01:21 PM
expander rings: 87mm vs 85.3mm
I have Buddy's and my builds going on side by side and noticed that the 1270 kit has expander rings which are under much more compression when installed than the 87mm billet kit's. Both are JE pistons.
anyone know why???
Bueller?..., Bueller?..., anyone?..., anyone?...
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zxlnt
Needs a job
Kawpuke Extraordinare
Posts: 2853
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posted July 30, 2006 09:34 PM
Karl, I had the same "problem" when I built my 1270 motor. It turned out not to be a problem after all. It just took some carefull assembly and patience to get it together. The picture I posted isn't linked anymore, but I can find it and email if you want to see what I was talking about..
http://www.bikeland.org/board/viewthread.php?FID=1&TID=5821
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entropy
Moderator
Posts: 8671
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posted July 31, 2006 12:24 AM
zx,
i remebered your "problem" when i encountered this issue, and did a search, read yr info. 
It convinced me that there is nothing wrong with the 1270 rings, i just wonder why the biilet block's expander rings aren't so "problematic".
But i would be really grateful if you find the photos and send em to me
guntekd@chevrontexaco.com
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zxlnt
Needs a job
Kawpuke Extraordinare
Posts: 2853
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posted July 31, 2006 01:11 AM
Yeah no problem I still have the picture(s) at home..
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zxlnt
Needs a job
Kawpuke Extraordinare
Posts: 2853
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posted July 31, 2006 04:16 AM
karl the email is bouncing for some reason..
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entropy
Moderator
Posts: 8671
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posted July 31, 2006 08:55 AM
i talked with JE and they said that the rings on the 85.4 pistons (1270 kit) are sourced by Muzzy from Kawasaki as OEM rings off another model; thus they are not "made to order".
The Billet block kit with its 87mm pistons have made to order rings (i believe).
Both set ups work just fine; the 1270 kit expander rings are just a bit tighter,
case closed???
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