http://dualratiosprockets.com/ MAN! I would pay the money in a heartbeat if it fit my 511! I would just kill to go from 15/38t sprockets to 15/49..... Good God I would be a happy camper Requires a cush drive and horizontal drop outs....so far. So marchesini wheels with a rear cush drive compatible, and then machine the dropout axle bracket and an axle.
it looks like it takes up alot of space that prolly isn available on a dirt bike . and not sure how weather proof it looks either .
What is it, a planetary gearset? I tried to verify on their website kind of strange they won't come out and say. http://www.stuntlife.com/forums/2-stunt-discussion/294848-dual-ratio-sprocket.html
It was not made for me and my dirt bikes ... To be a little clearer, if you tried to give me one, I would not accept it even it you installed it. -- Never been in a stunt bike forum before ... I usually try to avoid stunts ... Or at least leave them to friends and PROs.
How is it dumb? IT has potential to allow you to change your final drive gearing in 5 minutes time. Pull off the freeway, unbolt 4 bolts and ride dirt with dirt gearing. Stop at the end of the day, bolt in 4 bolts, and cruise home at 75mph and 5000rpm. Personally I would want to gear 15/38 then be able to lower the gear ratio to 15/46 or 48. That would be PERFECT. Without any change in chain tension or sprockets? Sign me up. unfortunately without another set of gears it looks like they just have extreme ratio's.
Kawasaki had some type of set up on their 100 Enduro back in the early 70's that changed the c/s by a few teeth. One for riding on the road and than you could change it once you hit the dirt without adjusting the chain. I don't recall how it was done off hand.
if your riding a "dirt bike" where you need or can 75 down the pavement your either gonna have crappy tires that wouldnt do worth a crap in the dirt or dirt tires wore plu out cause you just went down the street and tore them all to hell and back.... AND.... changing from a 40 to a 79? SAY WHAT..... thats like running a 25 front sprcket.... not even a KX500 would pull that.... if you need to go extended distance on pavement to get to riding area put it on a trailer.... this product is LAME
pipe dream for off road/DS cost vs sales, you all will never see it for dirt bikes like the ones you are all discussing especially out of production models. PS Ive seen many guys that know how to ride their bikes ride single track with Baja gearing and others ride roads in baja with single track/race final gear (me on TE and TXC310 with 13/50)