Zippers oil bypass shim

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Mar 4, 2009 | 05:48 PM

wrenchguy24

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From: Cedar Rapids, Ia

Zippers oil bypass shim

Anybody else install this??? How much did it boost your oil presuure??

This winter Installed Big bore kit Se 203 cams new lifters all new cam bearings gaskets etc
and also a new Zippers oil bypass shim!! I of course pulled out the the old spring and plunger to make sure every thing is nice and clean before installing the shim!!!
I only have about 55 miles on the bike since I have it back together, I just got back riding 25 miles granted its cold outside about 45 degrees and going down the highway my oil pressure is about 58 psi and at idle its about 30 psi!!!
Now this shim is suppose to only raise pressure about 3-5 psi!!!!
So why is mine so high?
Bike runs great !!! also PC III custom map from fuel moto and monster ovals!!!

Mar 4, 2009 | 05:55 PM

jarhead45

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From: Sin City

hmmmm.. almost seems too high, if there is such a thing

Mar 4, 2009 | 06:34 PM

Hillsidecycle.com

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Don't know if I'd be too concerned.
We use those by the bagfull.
Scott

Mar 4, 2009 | 06:58 PM

rbabos

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From: Woodstock, Ont , Can

Seems like a lot of needless pressure on your chain tensioners, which may or may not reduce their life. Don't know for sure, but it would make sense.
Ron

Mar 4, 2009 | 07:19 PM

Old Gunny

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I've run one for about a year now. No problem whatsoever. Nothing unusual.
But I don't have a oil pressure guage on the bike. Now I wonder.
But I would double check the guage. When the engine is off does it go to Zero?, for starters.

Mar 4, 2009 | 07:25 PM

wrenchguy24

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From: Cedar Rapids, Ia

Yea it goes to zero with bike off!!!

before the build I was lucky to get 35 psi max at any time!!!!!

I just didnt think this 6.00 part would make that much difference!!!

Mar 4, 2009 | 07:56 PM

wrenchguy24

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From: Cedar Rapids, Ia

Quote:

Originally Posted by rbabos

Seems like a lot of needless pressure on your chain tensioners, which may or may not reduce their life. Don't know for sure, but it would make sense.
Ron

This does not make since to me !!! the tensioners are spring loaded not Hydrolic why would more oil pressure make them wear more?