Hey to everyone!

[cumbria123]

Hello to everyone.


I am new to this site but have already found it very useful.

I recently bought a BT50QT-11 retro scooter and I am very impressed with it. I followed the derestriction guides on this site and was very careful not to damage or lose any parts (the instructions were very good and easy to follow).

However, I have a problem that I hope someone can help me with. Having derestricted the scooter it now has a "flat spot" on acceleration about mid way through the range. This translates into a cough when already moving.

Are there any further adjustments (ie mixture) that can be done? I would be grateful for any help.

Thanks

[ally1756]

what speed does this spot come into play at?

[cumbria123]

Flat spot is there when setting off (fully open throttle) and at about 25 mph when cruising, when you twist for a little bit more!

[ally1756]

ok i dont really understand what u eman then acn u explain in a bit mroe detail?
ally

[cumbria123]

Basically it starts to move away from a standing start normally, then struggles for a second, and then seems to pick up and go. When cruising at 25-30mph and you twist to go faster it hesitates before it does what you ask it to.

[baotian]

probly your mixture screw m8, id say 2 and a half turns out

[cumbria123]

Cheers mate, Ill give it a try in daylight tomorrow.

[Scootin]

Be careful!
#no_no#
a little goes a long way on that fuel mixture screw. Try moving it very small increments. Once you break the factory seal on that screw be prepared to keep tweaking it peiodically.

[ronaldihino1]

Also, check for kinks in your air pipes