Hi there!
My 550 has the following symptoms; runs very strong from closed throttle to WOT for +- the 1st 30min
Thereafter, on pilot jet, it literally runs as if the choke is out; sputters, won't idle etc. Once it manages to get on the main jet, it pulls like before again.
Other info:
-It has an aftermarket Leo Vince slip on.
-I increased the pilot jet from 38 to 42 IIRC.
-I also installed the Yamaha needle.
-Altitude = 4900 ft.
I reckon what happens is that the exhaust heats up the carb and this causes a lean condition?
Should I ceramic coat the exhaust inside and out in order to drop the temperature and increase the pilot to 48 perhaps?
Thanks
My 550 has the following symptoms; runs very strong from closed throttle to WOT for +- the 1st 30min
Thereafter, on pilot jet, it literally runs as if the choke is out; sputters, won't idle etc. Once it manages to get on the main jet, it pulls like before again.
Other info:
-It has an aftermarket Leo Vince slip on.
-I increased the pilot jet from 38 to 42 IIRC.
-I also installed the Yamaha needle.
-Altitude = 4900 ft.
I reckon what happens is that the exhaust heats up the carb and this causes a lean condition?
Should I ceramic coat the exhaust inside and out in order to drop the temperature and increase the pilot to 48 perhaps?
Thanks
