very bad stumble

powerwheelie · Aug 2, 2011

I've got an 2004 xb12r. just turned over 16,000 miles. It stumbled twice on me, so I did a tune-up (plugs, oil change, air filter clean) that I wanted to do anyways. The bike has an exhaust, k&n, and race ecm. At 60 mph at 3 grand it stumbles VERY badly. to the point where it almost stops running. The engine light flashes on and goes off usually. I just parked it from my test ride because it was getting very bad. It seems electrical, and something major. any ideas???

buellbradski · Aug 2, 2011

Tps reset maybe?loose ground?thats where id start

Kid1620 · Aug 2, 2011

When was the last time you cleaned ur fuel system

iman501 · Aug 2, 2011

out of blinker fluid?

tseldon · Aug 2, 2011

out of blinker fluid?

hahahaha i have used that one a couple of times on some girlfriends. they were not amused, i thought it was hilarious though.

powerwheelie · Aug 3, 2011

The lights/dash dim also, which indicates electrical. I regularily run sea-foam through it.. My first thought was a wire hittin the frame of block, any ideas where to look? I'm new to these bikes and electrical is my weakest trait.

powerwheelie · Aug 3, 2011

It seems you need a computer and software for a tps hard reset also, is that correct?

buellbradski · Aug 3, 2011

yes up to 07 you need ecm spy to reset. but if ypu lights are dimming i would check all grounds make sure your batt has a good charge. im not sure but i think your voltage regulator could make it run shity if it wasnt puting out proper voltage?aslo if your eng light is going on i would get a cable n read the code your throwing.that would tell you for sure. without your just guessing

Iamarchangel · Aug 3, 2011

When you start your bike you get about a four second engine light. If it comes back on or stays on longer there's a code so you know there's a problem.

However, if that's not happening, you've got a ground issue.

If your clock is resetting, you're losing electrical power.

powerwheelie · Aug 4, 2011

There is no engine light, except when the problem occurs and does NOT stay on. I was going to check the wires for bad connections or bad grounds for starters, but there's quite a bit of wiring for a bike.. The clock doesn't seem to be resetting.

powerwheelie · Aug 5, 2011

fixed! for everyone elses knowledge- it was a bunch of loose wires and fuses. It apears it rattled everything loose.

Cbyerspace · Aug 28, 2011

I was having the same issue a day or two ago, I found some lose wires I tightened down and I hope that cures it...

very bad stumble

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