96 YZ125 Exhust Valves

eagles22793 · Apr 19, 2009

I have a 96 yz125 2 stroke dirt bike. When the bike is started there is air coming out of the exhaust valve vent hose. It comes out a lot, it feels like it is a minny exhaust system. I thought that some air comes out of it but not this much so I think the exhaust valves need to be cleaned. What do you guys think about this?

rmc_olderthandirt · Apr 20, 2009

To start with, I recommend that you refer to the valves as "power valves" rather than "exhaust valves".

If you are getting a significant amount of exhaust gases leaking past the power valves then it suggests that either the valves are worn or the bore in the cylinder where they ride is worn. I doubt that cleaning them will improve the seal.

I highly recommend getting a manual for the bike and referring to it. I suspect that fixing this will be expensive.

Rod

eagles22793 · Apr 20, 2009

ok but that was not what I was asking Thanks anyway Rod
I want to know if there is supposed to be a lot of air coming out of the vent hose

96 YZ125 Exhust Valves

eagles22793

rmc_olderthandirt

eagles22793

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