Stalling on Bumpy Roads By ellpee (Read 361 times)

[ellpee]

Re-posting from the trike classroom, as this is more likely a generic problem and I'll get more answers here.

Finally got most of my problems resolved and have been able to put 100 miles or so on my 2012 Magnum, good fun. But I notice it does not like bumpy roads -- not just off-road conditions, even rough pavement, of which we have far too much here in Tucson. If I hit a really bumpy stretch filled with patches and crack seals it wants to die, almost as if I had run out of gas. If I react quickly on the gas I can sometimes pull off the road and keep it running until it smooths out again, and if it actually dies it's perfectly willing to start again. But I'm not real sure where to start looking for the problem or what to do about it. Would be happy to limit myself to smooth pavement all the time, but that's not realistic. Thoughts on where to start looking? Thinking maybe carb float bumping up and down enough to intermittently shut off gas flow???

Read more: thescooterprofessor.proboards.com/thread/4783/magnum-again-new-question?page=1#ixzz5OeTo9Uik

[cyborg]

Id put it down to the carb float is set too high and there's a minimum amount of fuel in the bowl and when it gets bumpy the main jet is sucking air,,,or one of the ignition related plugs is not seated completely and is getting jostled around and is going intermittent on you

[ellpee]

Yeah, I'd given some thought to the float too, I can imagine it bouncing up and down like crazy on those rough stretches. Hate to have to pull the carb again, but may have to give that a try. I presume just bending the float tab a wee bit should do the trick; seems like I'd want the float to let a bit more gas accumulate in the chamber before the needle valve closes, right? The fact that just pulling over and letting it run while standing still "cures" the problem steers me away from something electrical, though I don't rule it out entirely. Any other ideas out there in scootworld?