whistling gear ups

does anyone no wer to get those gear up kits that whistle my mate had one on his jog and it sounded sik i heard they have to be twisted teeth cos all gear ups i can find have straight teeth for less friction and less gear wear any1 got one of these or no wer to get thm thanks

 

if i remember right its the straight cut gears that make a whining noise once fitted

 

yes as said its straight cut gears that whine

i was dissapointed to find my malossi gears did not whine in my trekker

 

o isit ye i bought a malossi gear up a while ago just for the whine lol but found out it does'nt
does the stage 6 or polini primary gear whine ??

 

As kids we put a playing card in the spokes of our push bikes held on with a peg, maybe you could try something similar !!.

 

am i serious well na i just waste my time and everyone elses chattin shit on forums