hey hows it going having a issue with my bike dying on me at idle. the bike started off with a fuel pressure regulator issue, so that got changed along with the spark plugs. now im having an issue with the bike cutting of on me at idle or when pulling up to a stop signal or sign, whats making more diffucult to diagnose the problem is that i do not have a speedo / gauge . Like i said at idle and when grabbing the clutch down shifting the bike tends to kill over other than that it runs fine.

 

Maybe providing a little history on the bike. Any mods done to it, performance or otherwise ? Mileage ? How long have you had it ?

 

a month ago i replaced the fpr and spark plugs bike seemed to run strong for a week or so now i having idle issues and not having a gauge cluster to help me figure out whats going on

 

well do to recent events im beginning to believe that the timing on the bike is terribly off so now im looking to know how to adjust the timing. as far as the history of the bike goes there has been a motor swap. miles unknown, former stunt bike never mentioned this because most shops and even the dealerships want nothing to do with it because it was a stunt bike.

 

I understand why a shop doesn't want to tackle it due to it being a stunted bike. Theres no telling what it could be.

What happens if you turn up your idle adjustment? its possible its just too low. Its the small black **** on the left hand side of the bike, usually just under the seat area.

Does the bike start well when its cold and run poorly once its warmed up?

But, I would invest in a guauge cluster. A lot of bikes will use the cluster as an interface between the motor and the ecu. Meaning the ecu gets information directly from the gauge cluster. Not all bikes do, but there are certainly a lot that do.

I would also bet the Bank angle sensor has been bypassed since it was a stunt bike. You will want to double check the bypass to make sure the wires have not come loose. If this is going to be a street bike, I'd suggest putting in a bank angle sensor if it has been removed. It will kill the bike in the event of a crash.

I would lean away from it being the timing. If it was the timing, it would run bad all the time, not just at idle. It could be, but its not characteristic of out of timing for the bike to run good in the upper rpms but bad in the lower.

The things I would check would be fuel pressure, voltage at the battery at ilde and at 4,000rpms, the kill switch, the kickstand switch and the bank angle sensor. There is also a fuel cut relay, but I don't think it would only do it at idle. I would also check all of the grounds and wires. This could all be a loose connection somewhere.

 

Turning the idle up only seems to have affect on start up. The bike always starts after starting when the rpms begin to drop is when the rough idle begins to show.

Bank Angle sensor is bypassed the previous bypass wasnt done right and caused the fuel relay to constantly click. part of the issue is lag in throttle response thats starting to make me believe its timing the mechanic i had look at it said something about a backfire in the engine also makes me think bad timing unless my ecu is fried which is a whole new can of worms.

 

Well after thumbing around in the bike for a few hours I found out the problem was a overly simple problem of the vacuum hose from the map sensor was off. The sad part was the shop that charged me $40 to look the bike over missed it. Well i guess we all make mistakes. Thanks for the help