Bumps cause Spree-icide

[devenex]

My spree is yet another model that dies going over bumps. I finally got around to looking into the problem today, but couldn't find the cause.

I jiggled every wire I could find and never got the motor to die or even sputter. Even took off the horn cover and checked those wires, and still no luck.

Any suggestions? Does anyone know if there is a particular trouble spot? I checked the previous posts about this and it seemed like a loose coil was usually the cause, but I ruled that out.

[mookie]

your sure that the plug cap clicks into position onto the spark plug tip?

faulty kill switch?
could be at the switch on the bar and could be where it plugs in.
could be several things but you know it's electrical!!!

ignition switch plug in?

disconnect some suspect plugs and squirt some WD40 or whatever in there.

[devenex]

Well I made sure that the coil was secure on the plug, then wiggled it around with the spree running and observed no change.

The kill switch circuit is a good idea, I'll have to give that some extra attention today.

[Wheelman-111]

Greetings:

Check all the critical connections while you're at it. I thought I had developed a Deadly Problem when I first removed the airbox and re-mounted the Aero Coil. It was just one of the two 12V wires to the coil itself that had worked loose. Bumps would cause the stutter until it fell off altogether.

[devenex]

Yeah, I thought that might be the problem but the wires were holding on just fine when I checked them.

Also, if it has enough speed it will stutter but not die. Only at idle/low throttle do bumps kill it. My explanation for this is the motor restarting with its momentum, am I wrong? Would an electrical problem kill it every time?

UPDATE: Just got back from a ride and tested it some more. If I recreate a bump while stopped I can keep it from dying by applying throttle, but I noticed the idle drops for ~5sec then gradually comes back over the next ~5sec. This is making me toy with the idea of swapping the float with the one from another carb.

[Bear45-70]

Sounds more like a fuel related issue than an electrical one to me. High or low float setting could cause this.

[Wheelman-111]

Greetings:

I'm not with The Bear on this one. It's the sudden part of this that to me suggests it isn't fuel-related. The symptoms are wrong. A carb will keep feeding fuel for a while even when the bowl level drops a bit. Keep an open mind and let us know?

[Bear45-70]

Greetings:

I'm not with The Bear on this one. It's the sudden part of this that to me suggests it isn't fuel-related. The symptoms are wrong. A carb will keep feeding fuel for a while even when the bowl level drops a bit. Keep an open mind and let us know?

And if the level is too high it will slosh extra fuel in to the throttle bore making the engine do exactly what he described as happening.

[Wheelman-111]

Greetings:

You sure could be right, Bear. I went back and re-read the symptoms and it does sound like a fuel issue. What could make a carb go bad like this? Maybe a cracked float?

Just a hunch, but is your keychain festooned with every key for the Asylum? If so the first thing I'd jiggle is the ignition key. .

[Bear45-70]

........................Just a hunch, but is your keychain festooned with every key for the Asylum? If so the first thing I'd jiggle is the ignition key. .

I can't argue with that except he says he can keep it alive by applying throttle.

[devenex]

I tested today w/ just the scoots key in the ignition, no difference.

I'll probably swap the float tomorrow, any good suggestions for testing the other one before I put it in?

[Bear45-70]

I tested today w/ just the scoots key in the ignition, no difference.

I'll probably swap the float tomorrow, any good suggestions for testing the other one before I put it in?

Drop it in water and see if it floats. Try it with both sides down.

[devenex]

Swapped the float yesterday w/ my spare and there is no difference. It takes a sizable bump to do it and I know how to keep it from dying so I guess I'll just stand pat.

Thx for the help guys, if I come across another float (w/o paying much) that has demonstrated not to do this I'll give it a try. For now though I'm calling things good enough.

[jamadi112233]

i recently was having the same problem. it turns out when i was hitting bumps i was leaking in air around the bystarter. i sealed the bystarter into its hole and the problem is gone. i used a clear and semi soft sealer so that i can still remove everything in the future. just an idea that worked for me.

[devenex]

Hmmm, I'll have to check the bystarter tomorrow then. Thanks for the heads up jamadi112233.