Faster! By conora (Read 538 times)

[conora]

I have a 2007 tank urban 50 moped with a BBK, new ignition coil, new cdi, new air intake, straight pipe, 95 jet and 9g roller weights. Right now it tops out around 45. I was wondering what would be the next step to make it even faster? Thanks!

[Alleyoop]

Do you have a performance variator bigger in diameter than the oem? For the bucks taller tranny gears will get you 3-6 more top end mph.
Alleyoop

[conora]

No just weights, what variator would you recommend?

[Alleyoop]

Measure the one that is on there now like in the poicture below, you want one that is close to 1/2 inch larger in diameter.

Scrappy has a one that is 79mm in diameter which is 3.11 inchs across: But google for performance variator they have them even a little bigger for your motor which I assume it is a 139QMB.

MEASURE yours across and also measure the FAN PLATE you want to have them match in diameter(THE PART that the belt rides on not the teeth for starting.
www.scrappydogscooters.com/139QMB_50cc_Performance.html

This one is 89mm in diameter 3.50 inchs across

www.aliexpress.com/item/Chinese-Scooter-Performance-Racing-Front-Clutch-Variator-GY6-50cc-139QMB-1P39QMB/32450299530.html?spm=2114.40010208.4.177.zOcJI7

MEASURE YOURS LIKE IN THIS PICTURE: The picture are VARIATORS for 150cc motors the 50cc variators are about 1 inch smaller in diameter.