Really need some help with bike running at half speed.

[Msamuel022]

i own the yiben strider 125cc scooter which is a chinese import, done around 6k miles, but to day on my way to work i came off the slip road to get up to 60mph, around top speed and the power of the bike suddenly dropped, to 30mph.i continue to have the throttle all the way back but nothing.

when on the stand i pull throttle back to max, ticks over to 6k rpm hops about abit then raises to 9k rpm.

so could any 1 help me with whats going on and how much this thing is going to cost me to get fixed.

[B10Hazard]

I would start with giving the carb a good clean and giving the air box/filter a clean out.
Sounds llike it is being starved of fuel at a certain point.
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[Eddie Hitler]

Im not sure about the airbox as theres a problem at tickover also. I would agree with cleaning the carb but that may be tricky if your not sure how.

Simple checks I would make would be checking the airbox for anything obvious, spark plug maybe? Worth giving it a clean or better still replacing it (only a fiver if that).

[B10Hazard]

[Msamuel022]

ok when pulling the throttle back and raising up in rpm gets to 6k rmp holds there for 1-2 secs then continues up to 9k, instead of a graduale thing

[Msamuel022]

but defenetly bogging down

[Msamuel022]

so could it be dirt from fuel blocking up the emulsion tube,or something blocking air getting to the carb.

[Pete.]