Subject: Re: cylinder/piston advice needed!
Author: Hunter Jones
Date: Sep 9, 2001, 2:24 PM
Post ID: 1708168680
Andy,
If you are reasonably sure that the valves are OK AND have run the engine
long enough for the rings to develop some kind of positive karma in their
new home AND the compression is nearly the same as before AND you are not
sure of the bike's past THEN it may be possible that you have a difference
in combustion chamber volume. There is no telling what a PO may have done
or had done to it.
Do a leakdown test if you can to determine where and how much leakage the
cylinders have and if they are within reason. If so then pull the heads off
and cc them. That is measure the volume of the combustion chamber. Also
make sure that the pistons are the same and come to the same height in the
bores.
If you don't know how to do any of this stuff I'm sure one of us can help.
Hunter
At 04:37 PM 9/9/2001 -0400, you wrote:
| ============================================================ Explore the jungle in your backyard -- FREE! eNature has bird sounds, Animal Finder, Field Guides, experts, activities and more for a suburban safari you'll never forget. http://click.topica.com/caaadfpb1dfltb2rQ5Za/eNature ============================================================ hi dave- after getting kermit outfitted with the new engine/trans., i went out for a ride today- real nice, but the torque just wasn't there [STILL!] so i came back home and grabbed the compression guage. crap!!! 120lbs., left cyl., 150 rt.cyl........ question- i lubed the cyl. walls with a liberal dose of stp engine oil treatment before sliding them over the pistons. is it possible that this sticky stuff has prevented the rings from sealing? i was gonna assemble them dry [figuring the nikisil is hard stuff & could take it] but d. richardson reccommended against it. i did lap the valves, so this is the only thing i can think of. if so, i guess i gotta tear it down again @#$!!%&(%!! and hone [?] the cyls.??? any advice is needed& wanted, with thanks!!!!! andy ============================================================ Explore the jungle in your backyard -- FREE! eNature has bird sounds, Animal Finder, Field Guides, experts, activities and more for a suburban safari you'll never forget. http://click.topica.com/caaac1Nb1dfltb2rQ5Zf/eNature ============================================================ |
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