Cough off idle
#11
04-25-2018, 11:10 AM
Carb's typically need to be "rebuilt" every 10 years or so, so if you haven't done so, it's due. You can get a complete rebuild kit here for ~$20.00. The kit includes a new accelerator pump which may be your problem.
Also, while it is not related to your current symptom, for a typical 2004-2006 stock bike with just the exhaust upgrade, a 190 main jet is too big. a 180 or even a 175 is usually appropriate. The main jet though doesn't come into play until about 3/4 throttle.
Also, while it is not related to your current symptom, for a typical 2004-2006 stock bike with just the exhaust upgrade, a 190 main jet is too big. a 180 or even a 175 is usually appropriate. The main jet though doesn't come into play until about 3/4 throttle.
#13
04-26-2018, 02:09 PM
Join Date: Apr 2018
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Does this do it all the time or is this just an occassional weird flukey thing?
I have a carbed bike that will pop like that super rarely on cool days when it's about 2/3rds warmed up, just off the enrichener. Once or twice a month in the spring/fall. That's pretty normal.
If you've checked and rechecked for vacuum leaks and can't find any, it's time to revisit the carb.
If it's happening basically all the time, make sure the accelerator pump is working. Especially at 10+ years old these can go bad. That's an easy visual check to see it spraying with the air filter off. If that's good, time to look at jetting.
A 45 pilot is plenty rich for some, but your specific situation may need a bit more, some people run a 46 or 48 pilot. Also, the needle is important- what needle is it? running any shims?
I have a carbed bike that will pop like that super rarely on cool days when it's about 2/3rds warmed up, just off the enrichener. Once or twice a month in the spring/fall. That's pretty normal.
If you've checked and rechecked for vacuum leaks and can't find any, it's time to revisit the carb.
If it's happening basically all the time, make sure the accelerator pump is working. Especially at 10+ years old these can go bad. That's an easy visual check to see it spraying with the air filter off. If that's good, time to look at jetting.
A 45 pilot is plenty rich for some, but your specific situation may need a bit more, some people run a 46 or 48 pilot. Also, the needle is important- what needle is it? running any shims?
#14
04-26-2018, 02:10 PM
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