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kkameny

air leak?

6 posts in this topic

I decided to check my jetting last night to try to eliminate some decel popping. The previous owner wasn't sure what it had.T he bike ran good before. I have a Q pipe, Yamaha AIS block off, YZ stop,grey wire cut, Zip ty screw.At sea level

It appeared to be jetted o.k. main-168. pj-50, needle is the one from the AIS kit at the 4th position. So when I put it back together it popped 100% worse.

I didn't change anything,I even took it back apart to make sure all was o.k.

The only thing I found was I broke the the fitting for the hot start at the carb. It works o.k. ,but will it leak air through it and cause popping?

Thanx

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It could because all the hot start does is open up another air passage allowing the mixture to lean out to start the bike when it is warmed up, so if you have a broken fitting, some air might be leaking into there.

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So when I put it back together it popped 100% worse.

I didn't change anything,I even took it back apart to make sure all was o.k.

The only thing I found was I broke the the fitting for the hot start at the carb. It works o.k. ,but will it leak air through it and cause popping?

Thanx

The hot start opens up a controlled air leak to lean the bike out for easier starts under specific conditions. If its broke, your bike will run extremely lean. :thumbsup:

Yes, that is what I would be looking into further, and fixing :thumbsup:

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