C
Call Me Ahab
Guest
Greetings all, I'd been putting off a post on this while I stumbled through what I knew to check on... I'll run through the problem first, then a breakdown of what I've done to try to address this.
At idle, just started, bike runs great. Bike will not run on choke, starts cold from idle position, has instant power, takes off from cold start. (I understand that RPM isn't really helpful when trying to pinpoint the problem here, but I really don't know how to relay throttle position beyond 'just barely rocked') SO! When I try to rev the engine in-gear, the engine bogs down, won't accelerate worth a darn. I can run up to 4-5k rpms, switch gears, rinse and repeat. Bike won't breach 55mph. When I use engine to brake, it revs down just fine, handles it like it should - but when I pop the clutch to downshift the engine stalls. Release the clutch, let it roll, it restarts itself. (Compression is perfectly fine @ ~120psi across all 4)
So - on to what I've done to try to address this. I've sync'ed the carbs twice, and reset air-idle mix 4/5 times. I have gone over the airbox (ordered after I got the bike, more on that later), checked for leaks there. Nothing trned up, but I resealed it anyways. Air filter looks just fine, its the K&N replacement for the stock filter. No oil, just dry. Engine intake boots + o-rings are new, no leaks there, tested with ether. Airbox intake boots are OK too, no cracks, no leaks. Carbs are clean as of a month ago. Have drained fuel thrice in an attempt to restart fresh every time. I do not know what jet size is currently in there - this is part of the reason I make this post (not to ID them, but to troubleshoot). Choke, again, has no effect on engine starting, running, or idle. If anything it runs worse on choke.
*#3 spark plug threads are torn out, rethreaded the engine block and installed new plug today.
*Petcock leaks. Almost f'ing always, and I thought I'd fixed that today - apparently not.
*Bike came with carbs open, with pods in a box to the side. No airbox.
*When I acquired the bike, it would NOT run consistently - it started once, then revved up to 6k rpms and I cut it off.
*Valves are OK. I checked clearances, and while not perfect, are within tolerable operation specs. (.02 being the lowest clearance.)
*Coils are great - sparks hurts like hell.
*Plugs are pitch black when I pull them.
*All plug gaps set @ .32
**Stock carbs, stock pipes <- Edit
So - my question now is:
If the damn thing came with pods set aside, and no airbox, is it likely that the carbs were rejetted? PO was NO help, he had done much more harm than good when 'repairing' things. Absolutely disgusting. If it has been rejetted, would that explain my problems with the stock airbox? If so, is it advisable to return to the bloody pods?
Have I overlooked or failed to include anything? Any assistance is much appreciated - for once I was confident that I could resolve a problem on my own. Damned if I wasn't wrong.
At idle, just started, bike runs great. Bike will not run on choke, starts cold from idle position, has instant power, takes off from cold start. (I understand that RPM isn't really helpful when trying to pinpoint the problem here, but I really don't know how to relay throttle position beyond 'just barely rocked') SO! When I try to rev the engine in-gear, the engine bogs down, won't accelerate worth a darn. I can run up to 4-5k rpms, switch gears, rinse and repeat. Bike won't breach 55mph. When I use engine to brake, it revs down just fine, handles it like it should - but when I pop the clutch to downshift the engine stalls. Release the clutch, let it roll, it restarts itself. (Compression is perfectly fine @ ~120psi across all 4)
So - on to what I've done to try to address this. I've sync'ed the carbs twice, and reset air-idle mix 4/5 times. I have gone over the airbox (ordered after I got the bike, more on that later), checked for leaks there. Nothing trned up, but I resealed it anyways. Air filter looks just fine, its the K&N replacement for the stock filter. No oil, just dry. Engine intake boots + o-rings are new, no leaks there, tested with ether. Airbox intake boots are OK too, no cracks, no leaks. Carbs are clean as of a month ago. Have drained fuel thrice in an attempt to restart fresh every time. I do not know what jet size is currently in there - this is part of the reason I make this post (not to ID them, but to troubleshoot). Choke, again, has no effect on engine starting, running, or idle. If anything it runs worse on choke.
*#3 spark plug threads are torn out, rethreaded the engine block and installed new plug today.
*Petcock leaks. Almost f'ing always, and I thought I'd fixed that today - apparently not.
*Bike came with carbs open, with pods in a box to the side. No airbox.
*When I acquired the bike, it would NOT run consistently - it started once, then revved up to 6k rpms and I cut it off.
*Valves are OK. I checked clearances, and while not perfect, are within tolerable operation specs. (.02 being the lowest clearance.)
*Coils are great - sparks hurts like hell.
*Plugs are pitch black when I pull them.
*All plug gaps set @ .32
**Stock carbs, stock pipes <- Edit
So - my question now is:
If the damn thing came with pods set aside, and no airbox, is it likely that the carbs were rejetted? PO was NO help, he had done much more harm than good when 'repairing' things. Absolutely disgusting. If it has been rejetted, would that explain my problems with the stock airbox? If so, is it advisable to return to the bloody pods?
Have I overlooked or failed to include anything? Any assistance is much appreciated - for once I was confident that I could resolve a problem on my own. Damned if I wasn't wrong.
