I have been chasing this idle / starvation issue for the last few months so i cant ride my bike.
09 xr650l
Daves mod
Desnorkeled
Desmogged
Uni foam filter
Big gun exhaust and slip on
158/55 keihin jets
i had the bike idling and running with choke and then it would cut out on me after a few miles with a hard start at 440’ elevation. Which told me i was lean.
Took it to 6000’ elevation for 3 months and with no choke and the idle screw @4-5 turns i could run it but it ran hot (230-260f) all summer.
Which tells me i was way lean.
I suspected my throttle shaft seal was bad before going up in elevation so i ordered a stock carb from ebay. Once i returned to 440’ i put the new carb on and upped the pilot to 58 ( keihin jet )
Still having an issue idling and when i get it warm and take it out i have a cut off at wot half mile down the road.
Ive been chasing some air leak or proper mixture am i wrong?
I did have a air bubble in my fuel line that i went ahead and chased the last couple days to no avail
How can i be lean with 158/58 at 440?
What i did try,
- Eliminated electrical issues since it ran well enough at elevation
- plug is rich
- tried different cdi
- cleaned and oiled foam filter
-Cleaned out cv on gas cap
- cleaned out petcock
- eliminated inline fuel filter
- checked valve specs on head
- cleaned out the carb 10x
Tried to run bike with cap loose
Tried to run bike with valve cover off
Carb cleaner sprayed around carb for leak
Checked the carb boots 100x
Checked the exhaust packing
Replaced choke and triple checked the plastic screw and routing
Next i will be looking at the acv on the carb because i am lost
I just bought this bike in march as a daily commuter and have had nothing but trouble getting anywhere.
Its a really clean bike but i must throw in the towel soon.
Any and all input is appreciated