bogging down

[EXPERIMENTAL]

hey guys, just had a general question. my SJ is bogging down after short periods of idle. It is tuned fine because when i get the residual burned off it hits like a bat out of hell. would it be beneficial to run hotter plugs? i am running standard BR8ES plugs. would going to a BR7ES help this?

 

[ATS_Aaron]

Sounds like too rich on the low speed screws. Especially if it cleans up in the midrange or top end.

Aaron

 

[Matt_E]

hey guys, just had a general question. my SJ is bogging down after short periods of idle. It is tuned fine because when i get the residual burned off it hits like a bat out of hell. would it be beneficial to run hotter plugs? i am running standard BR8ES plugs. would going to a BR7ES help this?

No, but tuning the carbs right would help.
Sounds like your popoff pressure may be too low or the low speed adjusters may be too rich (as already suggested).
What is you setup and how are the carbs jetted?

 

[EXPERIMENTAL]

well as soon as we lean the low end, it hesitates we have the carbs tuned the best we can. dual 48mm are hard to tune! would it be worth it to go single 48??

 

[Matt_E]

What is your setup?
What carbs are these?
What is your popoff and jetting?

 

[EXPERIMENTAL]

high comp head, 35cc domes, dual 48mm riva pro series, moto tassinari carbon reeds, ported by protec, stock bore and stroke. not sure off hand what the jetting and pop off is, but we got our suggestions from paul lehr, and we was pretty spot on when we were first starting out

 

[Matt_E]

Sounds to me like the popoff may be too low, causing a rich condition at prolonged idle. Try raising it and compensate by increasing pilot jet size.

 

[EXPERIMENTAL]

thanks for the advice guys, but back to the original question, would there be any benefit to using a hotter plug?

 

[ATS_Aaron]

No.