2 STROKE WORLD .net

The 2-Stroke Garage => Turning Wrenches => Topic started by: LMS on June 30, 2023, 09:32:34 AM

Title: Sprocket sizes
Post by: LMS on June 30, 2023, 09:32:34 AM
When I re-timed the bike, I figured I should find out what sprockets I have, teeth number wise. So, this bike has 16 39 which seems somewhat of an oddball size based on my searches? Is this okay for street driving, doubt this will see freeway action, lots of stop and go.
Thx.
Title: Re: Sprocket sizes
Post by: m in sc on June 30, 2023, 10:19:31 AM
stock is 15/39. do you know if somebody put a 250 primary/clutch in the bike?

i run a 16/40 ont he 70 r5 and its fine. 15/39 is good, especically in town. 14/39 is lots of wheelies but fun. max of about 80-90 mph best case scenario wound the f out.
Title: Re: Sprocket sizes
Post by: LMS on June 30, 2023, 10:35:09 AM
I'm not even sure what that means (250 primary/clutch)? :umm:  I know the guy I bought it from put Barnett friction plates and springs. Then took half the springs out cause it was harder than snot to pull the lever.
Title: Re: Sprocket sizes
Post by: m in sc on June 30, 2023, 10:50:07 AM
the rd250 primary/clutch gear has a more aggressive ratio, most people don't do this (i do), and a common 'correction' is to go up one on the front sprocket. If this was done, i would have bet it would have been mentioned.

I mean, ride it. see if you like it. front sprockets are cheap. experiment with what you want, its def a personal preference thing. .

Title: Re: Sprocket sizes
Post by: LMS on June 30, 2023, 02:36:59 PM
The guy ran this bike on the salt flats, once, so anything is possible.