[arjacobson]

Hello all. Quite a while back i ordered a 18 front sprocket and a 30 rear from a guy who custom makes that size. I put the 30 rear on my sons st and put the 18 front on mine. NOW i am going to order another set just like it and cannot remember where i got them from. Anyone have any ideas on who it was that made these? I am pretty much topped out with the gearing i have and would like to be able to cruise at 55 for some short 40-50 mile hops.. I can run right up to 57mph but am screaming the piss out of the engine .Already checked most of the well known parts places. Any help will be much appreciated

 

[tmas]

If you go to the 30 tooth won't the chain interfere with the hub? I have a 31 on my zb and it is cutting it pretty close.

tmas

 

[arjacobson]

We put on on the sons st90- Not too much of a problem. I think he had to trim the black plastic disk thingy(LOL) been running a 30 on that for over a year now.

 

[1TrikZB]

Sprocketspecialist.com ?

 

[KSKENE247]

what size motor

 

[d0n]

I had to remove my black plastic thingy to make the 31t work. 30 would be cutting it close on a ZB I think.

 

[racerx351]

I had to remove my black plastic thingy to make the 31t work. 30 would be cutting it close on a ZB I think.

+1 st 90 uses a ct 70 style rear hub it may work.. i have a 33t and 31t as well

my st90 110cc semi i use the 33t rear and 15 up front good combo cruises nice at 50 mph....