lost power at WOT

[PimpinSpree]

I was cruising down the road at maxed out speed. Probably 55mph on an ever so slight down grade. All of the sudden I lost power. I stopped and it idled fine. It wouldn't go WOT for about 5 minutes when all of the sudden it came back to life. Today I rode it to work and it ran just fine. What do you guys think for possible causes?

[devenex]

Could be some gunk was passing through your main jet, I would check the carb bowl for sure.

[swimmingfree]

you may have had a soft Seiz... do you have a temp gage???
swimmingfree

[patthesoundguy]

Both devenex and swimmingfree have really good theories , could be either one. I would check both things out, carb and cylinder. I'm leaning towards the soft seize side of the fence. Are you running a stock setup on whatever scooter it is? I'd check the airbox, filter and carb connection if it is a stock setup.

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[PimpinSpree]

Correct me if I'm wrong. But if soft seize was the problem it would have had different symptoms. It would idle fine but couldn't give it full throttle for a fee minutes. It idled like nothing was wrong

[Pete M]

I think you have a fuel delivery problem. Probably a vapor lock from the tank vent. Run it with the cap loose and see if you have the same problem.

[Trafficjamz]

maybe some carbon got jammed up in the exhaust.

or rust clogged the fuel filter.

[kingkamehameha]

Fuel petcock, dirty carb, high temps can also cause power loss and hesitation

[hondafan]

Sounds like a fuel problem. We're there any strange noises when you experienced the power loss?

[JJ Joseph]

I was cruising down the road at maxed out speed. Probably 55mph on an ever so slight down grade. All of the sudden I lost power.

I vote for soft seize, especially if you were running without an air filter, for example. It'll easily overheat to the point of seizing at 55mph downhill. If you had a CHT temp gauge, you'd see the CHT go through the roof as you started downhill. The mixture goes lean as you close the throttle going down hill. That's what 2-strokes do. If you're lucky, it'll start and idle right away, but do this one or two times more and it'll seize "real good".

[maddog]

You maxed out the oil pump that caused a lean burn, change your gear ratio and beef up the clutch, lower rpms= the engine will last longer...