212cc predator engine gear ratio

[BigThieme]

So I'm curious what you guys think a good gear ratio would be for a off road go kart with 15 inch tires and a 12 tooth clutch on the engine and go about 32 or 35. I want to have good hill climbing power to

 

[OzFab]

If you want hill climbing ability, get yourself a torque converter, a centrifugal clutch will get you nowhere...

Also, a lot of torque is needed for hill climbing &, if you have loads of torque you won't have loads of speed; pick one or the other...

 

[BigThieme]

Well what if I had a 420cc or 346 then could I reach those spreads easily

 

[BigThieme]

Speeds easily

 

[OzFab]

With the governor intact & with a cent clutch, no

 

[gtmud]

Just my 2 cents.. I am running a 212 preditor with a stage one kit. (header, larger jet in carb, heavier springs, off-set keyway to advance timing) But even with out all that stuff, this engine stock was working really well with a 30 series torque convertor set-up, using a 7" driven, 10T jackshaft gear and 60T on final drive running 19" Spider Keated tires, pushing a yerfdog 30032. Set the driven spring to position '3', wind the hell out of teh driven spring, and just try to find a hill it won't climb!! Even with about 190 lbs(me, son and duaghter) it still is climbing canal banks! All this and it still has the govener hooked up! Also doesn't do bad for speed either. 35-40 mph.
So if your running 15'' tires you should doo quite well, but like it was stated before, for the best results use the torque convertor set-up. You can either by a complete kit, but I think they only come with 6" drivens, You can purchase the items seperately, including the jackshaft plate. The 6" will give you ALLOT of speed( 45-48MPH!!) with the rest of the before mentioned gearing. This speed was noted by driving next to the kart on wifes Sportster!! Blew my mind.