the rev limiter cuts in at 10 - 11 rpm or about 75mph i finally found out what it was.....the problem was a leaking carb at high revs!

johncbr1100 thanks fort he advice never thought of that, but sold the scooter a while ago now as the problem did my nuts in lol, but thanks all the same, info may be helpful for others tho.

I assumed rev limiter but rev limiter kicks in higher than that, it was a leak on the inlet manifold.

Hi, I have the same temperature problem, at higher speeds my temperature drops. is it a bad temperature sensor? Thanks

its a rev limiter standard fittment on most bikes now

Change the head cylinder thermostat!

First new rings, than throttle cable than check all dash wirering ... Replace the coil

clean the gauze disk on the fuel pump thats attached to to fuel pump as its there as a breather and if clogged up you wont be getting the full amount of petrol through to carb. the fuel pump is on the left footboard and the gauze disk is attached to the underside of the fuel pump. this part when u find it should be brass in color and i bet yours will be same color as pump black. clean with a little petrol on a cloth just dab it

Change spark plug

spark plug has been changed.

Fuel filter in tank

bad pinion contact on the engine

I know what it is