HOODWORKZ Posted December 18, 2009 Report Share Posted December 18, 2009 I have an 01 Banshee thats been running pretty good since I bought it in feb..and I got the head shaved today about .030 and then picked up a compression tester from harbor freight and I only got about 115 psi out of each cylinder with the bike cold and at full throttle..dont think its a leak issue because its the tester that holds the highest reading ..can anyone tell me wats up and if youve used this tester from harbor freight Quote Link to comment Share on other sites More sharing options...
TwistedSheeRida Posted December 18, 2009 Report Share Posted December 18, 2009 how many hours are on the top end? Quote Link to comment Share on other sites More sharing options...
DallasGDub Posted December 18, 2009 Report Share Posted December 18, 2009 Do you know what the compression was before? Quote Link to comment Share on other sites More sharing options...
bada450r Posted December 18, 2009 Report Share Posted December 18, 2009 I have an 01 Banshee thats been running pretty good since I bought it in feb..and I got the head shaved today about .030 and then picked up a compression tester from harbor freight and I only got about 115 psi out of each cylinder with the bike cold and at full throttle..dont think its a leak issue because its the tester that holds the highest reading ..can anyone tell me wats up and if youve used this tester from harbor freight my harbor freight comp tester was a pos...it was offf by like 20 pounds........get a nicer tester or ask a friend to let you barrow one. Quote Link to comment Share on other sites More sharing options...
HOODWORKZ Posted December 18, 2009 Author Report Share Posted December 18, 2009 how many hours are on the top end? Ive probably put about 10 since I bought it in feb...and I bought it off an older woman the og owner and it was her bike with pink stickers and everything she said she hardly rode it so im assuming not a whole lot but its probably the original top end since 01 Quote Link to comment Share on other sites More sharing options...
HOODWORKZ Posted December 18, 2009 Author Report Share Posted December 18, 2009 Do you know what the compression was before? nope I wish I did because the machinist told me he could only take about .028 off because of his machine and he may have not even taken that much off my head Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted December 18, 2009 Report Share Posted December 18, 2009 I got a Craftsman compression tester. It's pretty dang accurate. My only complaint is they didnt put a "head" on the end of it to tighten it down. For some reason it is just round, and you have to use plyers to get it tight. Quote Link to comment Share on other sites More sharing options...
ms4x4outlaws Posted December 18, 2009 Report Share Posted December 18, 2009 dont feel bad I bought a tester off of ebay for like 20 bucks and it looks like you made off better off than i did!! My tester said I had 60psi !!!!!! i know it is alot more than that because my banshee runs really good. Quote Link to comment Share on other sites More sharing options...
GrMeyer Posted December 18, 2009 Report Share Posted December 18, 2009 If you have a compressor you can 2nd check the gauge. But its the hose that is what is throwing your compression off. It still has to travel all the way up to the gauge before it will read the compression. Quote Link to comment Share on other sites More sharing options...
ms4x4outlaws Posted December 18, 2009 Report Share Posted December 18, 2009 If you have a compressor you can 2nd check the gauge. But its the hose that is what is throwing your compression off. It still has to travel all the way up to the gauge before it will read the compression. i wish! Quote Link to comment Share on other sites More sharing options...
canyncarvr Posted December 18, 2009 Report Share Posted December 18, 2009 and I only got about 115 psi out of each cylinder with the bike cold and at full throttle.. Notwithstanding the questionable tool..where did the idea come from to do a compression test on a cold engine? Quote Link to comment Share on other sites More sharing options...
shawn941 Posted December 19, 2009 Report Share Posted December 19, 2009 Notwithstanding the questionable tool..where did the idea come from to do a compression test on a cold engine? good point..... Quote Link to comment Share on other sites More sharing options...
Bill Posted December 19, 2009 Report Share Posted December 19, 2009 I bought one of those testers and it did not come with the correct end,it will thread into the head but its about 2 to 3 threads short. Harbor freight does sell the correct one,just bring a NGK plug with you to compare. Quote Link to comment Share on other sites More sharing options...
HOODWORKZ Posted December 19, 2009 Author Report Share Posted December 19, 2009 Notwithstanding the questionable tool..where did the idea come from to do a compression test on a cold engine? the difference between cold and hot isnt that much..and when you have an engine that wont run you have no choice but to do a cold compression test..so I did it cold to have something to go off of in the future if somethin happens Quote Link to comment Share on other sites More sharing options...
GrMeyer Posted December 19, 2009 Report Share Posted December 19, 2009 the difference between cold and hot isnt that much..and when you have an engine that wont run you have no choice but to do a cold compression test..so I did it cold to have something to go off of in the future if somethin happens Also people need to remember that some of the pistons that they expand when they warm up. So thats why I say do it on a warmed up motor. Quote Link to comment Share on other sites More sharing options...
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