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A leak test is when you plug the exhaust port and compress around 10 lbs of air pressure into yur cylinder through yur intake with a bike pump and an air pressure gauge attached to find any air leaks. Does this matte being on the exhaust si. The air leak you are seeing around the power valve gasket could be the power valve, or your right side main seal
You need to do some disassembly to further diagnose However i did a leak down test and i've got a nasty air leak out the power valve shaft seal Pv leak isn't as critical, main seal leak should absolutely be addressed
Take a look at the parts diagram and the service manual to see what it entails.
What supplies you need from your local hardware store to perform a leak down test on a two stroke dirt bike.certain areas to check for air leak locations.thi. Another ten percent will have major air leaks Despite these potentially fatal leaks, most of these leakers will run for some time before they seize or score a piston. Hey guys i've got a yz250 i offered to fix for my cousin who doesn't know much about bikes other then how to ride them
He had some issues with the bike and after listening to it i for sure knew it had an air leak High idle, rev hang, hard to start I first started with the carb and it was fine. View and download yamaha 1993 yz250e/lc service manual online
1993 yz250e/lc motorcycle pdf manual download
My friends (used to be mine) yz250 quit running the other day When he was riding it, it bogged then quit running He kicked it over again and started and idled for prolly 5 seconds then bogged and died If someone could help, cause nobody on everything2stroke will help,.
Hi all, i have a 93 yz250 that is having idle problems When i go to adjust the idle, i drop the slide as far as it will go, and then the motor revs even higher So i think i must have an air leak So i tear it down and do a leak test
Sure enough, the left hand seal.
Put new rings in the yz the other night And can not get it to fire, it was fine before, i cleaned the carb the pilot was blocked so im assuming that was the issue
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