While I'm busy working up to blowing up my second Duro Powergrip I ordered a 13 tooth countershaft sprocket. Does anyone else have one of these or is it even a good idea?
My bike already came with a 54 tooth rear sprocket so I can't see spending money on a 55 tooth. Will it be ok with a 13 and a 54?
ShaggyAnt, that is the set-up I have with my Duro, 13 in front, 55 in the rear. Due to Duro's significantly larger diameter this is not really ridiculously under geared. As Tom hints, it does give the Power to Grip darn near everything. I max out at about 63 mph but it is much happier at 55 or less. I consider the gearing correct for the intended use...trail riding in challenging terrain.
Last edited by ShaggyAnt; 04-03-2015 at 09:36 PM.
You should be happy with the 13/55 combo then; enough torque in second gear to take advantage of the traction afforded by the ATV tire yet with a low first gear to fall back on for the truly nasties. Where do you hail from Shaggyant? Last Duro fan I met rode primarily in muddy conditions with much taller gearing but I prefer your intended set-up despite the reduced service life of the tiny 13 tooth front sprocket.
I've been running 13 tooth s since mid 90's on 2 of the 3 TW's I've had. On my 99 13/54 with Bighorn 35 sounds happy.
'99 TW,Ricochet skid plate, Seat Concepts, Jimbo shield, 2" extended swingarm w/Maxxis Bighorn, 5.10 Kenda K270, Stealth exhuast, YZ80 hybrid front forks w/HyperPro proressive springs, ProCycle high mount front fender, ProCycle wide foot pegs, TT-R stainless head pipe, Lizrdbrth cooler, D-Flex hand guards, XT350 gas tank.
2002 Honda Spirit Shadow VT750
'78 Honda XL100
Well, you certainly live in Duro country then.
Hope that rascal pops on soon so you can enjoy it and the fun that comes with 13/55 in steep terrain. Must be getting prime riding conditions with trails melting out and winter deadfalls to be negotiated. Once upon a time I worked and rode a bit NW of Upper Priest Lake in the mtns. where the Air Force ran one of it's Escape and Evasion survival courses. ( now called SERE, Survival Evasion, Resistance and Escape). Nice country.
Last edited by Fred; 04-04-2015 at 02:13 PM.
SERE is over at Fairchild still. A guy I know teaches some of the classes. Were you ever out at the research center on Ponderay in Bayview? Know a couple of guys up there too.
Edit: Woo Hooo!!!!!! I just let the air out, re-lubed with KY and 90% isopropyl alcohol. Then I put the chuck back on and sent her up to 95psi and she popped right on like it was nothing. Awesome!!!!! I'm going to try and get ahold of the other guys who left three hours ago and get up on that mountian to try this beast out.
Last edited by ShaggyAnt; 04-04-2015 at 03:01 PM.