Cylinder 2

[Qahmad99]

Has anyone had any experience or trouble with one of your exhaust pipes being unevenly hot? I have a 78’ that will fire up great and runs pretty good but exhaust pipe #2 will not warm up as fast as the other 3. It’s not completely cold it just doesn’t get as hot as the others. I’m counting exhaust pipe 1 from the clutch lever to 4 on the front brake lever side of the bike.

 

[brettp]

You're counting them correctly. Not sure if cylinder 2 matters too much. Can you say it runs fine when warm?

 

[dirtdigger]

They are normally all very close, if one is noticeably cooler there is an issue, either fuel, lack of spark or lack of compression. I would guess you have a partially plugged pilot jet.

 

[Qahmad99]

You're counting them correctly. Not sure if cylinder 2 matters too much. Can you say it runs fine when warm?

Yeah runs pretty good when warm, couldn’t tell a much of a difference in performance unless you touched the pipes

 

[Qahmad99]

They are normally all very close, if one is noticeably cooler there is an issue, either fuel, lack of spark or lack of compression. I would guess you have a partially plugged pilot jet.

I plan to pull the plug’s tomorrow and check them out just to make sure they’re good then move on to fuel issue as you mentioned. Compression is within spec.

 

[brettp]

I was thinking clogged pilot, too. Or maybe a sticky float valve. But if the bike ran fine, then maybe it wasn't a big issue. But checking the spark plug is a good idea to rule things out