Engine surging at low throttle cruising
Posted May 18, 2006 - 06:38 PM
Posted May 19, 2006 - 01:10 AM
The sputtering is most likely a "too lean" condition.
Posted May 19, 2006 - 07:42 AM
Posted May 19, 2006 - 02:12 PM
Posted May 19, 2006 - 03:41 PM
Posted May 19, 2006 - 07:13 PM
1/8th throttle position isn't enough for the main jet.
Posted May 19, 2006 - 07:43 PM
Posted May 19, 2006 - 09:56 PM
You can verify that by unplugging the TPS and see if it goes away.
Posted May 20, 2006 - 02:23 AM
Posted May 20, 2006 - 05:56 AM
Posted May 20, 2006 - 06:01 AM
Ride the bike and find where the surge is in the speed range and throttle setting. Pull over and unplug the TPS. Ride the same stretch of road under the same conditions - compare?
The TPS will improve the surge, no doubt. My experience with it was around half the surge was attributable to TPS, the other was ACV induced and related pilot circuit. I found the TPS was needed for smooth running at smaller throttle settings, so mine is reconnnected. The ACV also influences the circuit when there is any change to vacuum. If you still have problems post TPS then do a search for ACV and see what turns up. It had been a much talked about subject earlier in the year.
PS. The bike will improve with age and after all the mods are DONE
Posted May 21, 2006 - 04:35 PM
Posted May 21, 2006 - 04:54 PM
Posted May 21, 2006 - 05:42 PM
How serious is the surging? Is it just changing rpms, or is it missing and sputtering?
Its probally the pilot circuit
What kind of back fire is it? is it a gun shot or is it more like a crackle? Crackeling is normal but explosions are a sign somthings amiss
Posted May 21, 2006 - 06:52 PM