can someone please help me ?

[dodgeit25]

ok first off im new to the forum and i have a 04 xb12r that i purchased last summer and have not had any fun yet do to this problem i am having i will be ridding down the road and the bike will shut off but all the lights stay on and you can not start it back up unless you wait a few minutes with the key on and you will hear the fuel pump prime then it will start, it also breaks up at the upper rpm range and pops through the exhaust sometimes backfires there are no cel codes and its driving me nuts so far i have changed ecm, pipe, plugs, wires, reset tps, all made no differance at all. all my wires seem to be ok its almost seems like there is a relay reseting when this happens i was thinking maybe the cam position sensor was going bad but not sure but seems to be getting worse my set up currently is erik buell ecm,d&d pipe,k&n air filter and air box breather mod with catch can.even when bike was stock had same problem so no need to tell me its the ecm or exhaust its somewhere else maybe cam sensor or bank angle sensor anyone please help me get this awesome machine running right thanks

 

[brumbear]

The only thing I can think of is:
A= check the headlights and make sure the wires leading in are not melted and ocasionally touching?
B+ change the coils and see if that does the trick
when the coils have small cracks they can open up as the bike heats up and close when it cools.
It's worth a try
sorry thats all I got

 

[buellbradski]

Fuel pump? Maybe?[confused] the kill switch to havent heard of any switch issues on buells but ive seen it on other machines. Does it tend to happen after warmed up or all the time? Does the fuel pump wine? When you did plugs what did you use? I used ngk dcpr8eix and they created a awfull stumble. Switched to dcpr9eix and solved my issue.

 

[captain chaos]

Check all of your grounds. Buells do seem to have grounding issues.

Also, Sportster are known for cam sensor issues causing all sort of wierd running problems. It's not much of a stretch to think that they probably used the same sensors in the XB's. That very well could be the problem. If it were my bike I'd start there and with the grounds.

good luck [up]

 

[uly luigi]

I'm betting fuel pump wire rubbed thru, let it sit with key on and soon you hear the pump prime up,

 

[Thaloc]

Sounds to me like its getting starved for gas at the top end. I would check your fuel hose routing, making sure there are no crimps or bends. After that, fuel pump. If it takes forever for the pump to actually start priming.

Hope this helps