03-16-2012, 03:13 AM
This one has me stumped:
Bike idles fine until you touch the throttle. Bike revs down slowly, sometimes sticking, other times holding a high idle for several seconds before returning to stock idle, or dying completely.
If I adjust the idle to a higher setting (using idle adjuster), it does not rev until I use the throttle. With a higher idle set, the bike returns to low idle under any load.
If I ride the bike down the street it has tons of power through all gears, however if I close the throttle and pull in the clutch the engine dies.
Engine behaves this way hot and cold.
(The fuel light is broken, there is plenty of gas)
Things I have replaced, changed, adjusted:
- Head has been freshly ported and polished, valves adjusted and
timed properly. New timing chain and guides.
- Today I double checked valve clearances and timing.
- 3 different throttle bodies, and 3 different sets of TB sensors.
- throttle body seats (connecting pieces between TB and head)
- Spark plugs
- Coils
- Valve cover (trying anything!)
- Wiring harness
- Battery
- ECU
- Stator
- Went through all grounds confirming good connection.
- airbox
- 2 different exhaust cans (one stock)
- cam chain tensioners (stock and manual)
- fuel pumps
- cam position sensor
Thoughts?
Bike idles fine until you touch the throttle. Bike revs down slowly, sometimes sticking, other times holding a high idle for several seconds before returning to stock idle, or dying completely.
If I adjust the idle to a higher setting (using idle adjuster), it does not rev until I use the throttle. With a higher idle set, the bike returns to low idle under any load.
If I ride the bike down the street it has tons of power through all gears, however if I close the throttle and pull in the clutch the engine dies.
Engine behaves this way hot and cold.
(The fuel light is broken, there is plenty of gas)
Things I have replaced, changed, adjusted:
- Head has been freshly ported and polished, valves adjusted and
timed properly. New timing chain and guides.
- Today I double checked valve clearances and timing.
- 3 different throttle bodies, and 3 different sets of TB sensors.
- throttle body seats (connecting pieces between TB and head)
- Spark plugs
- Coils
- Valve cover (trying anything!)
- Wiring harness
- Battery
- ECU
- Stator
- Went through all grounds confirming good connection.
- airbox
- 2 different exhaust cans (one stock)
- cam chain tensioners (stock and manual)
- fuel pumps
- cam position sensor
Thoughts?