40 tooth sprocket

[Crazy Nick]

IM SO PISSED !!! I need a 72 tooth sprocket type 40 for my 13hp go kart with 20x 8 wheels on it. Please help anyone. The site above only goes up to 70 teeth. my clutch will be a 1inch . i want torque not speed and im 240lbs so this man cart will climb hills. scaledodger@live.com

 

[Crazy Nick]

My end goal is 30 mph but with lots of torque. engine was said to come off of a commercial pressure washer. Ive never herd of a 13hp briggs on a pressure washer. But the engine is strong.

 

[redsox985]

70 and 72 are nearly interchangeable. The differences is torque and speed will be unnoticeable. It will also be considerably large. 70 will do just fine for you.

 

[r97]

near bottom, its #41 sprocket, but #40chain fits #41sprocket fine http://www.gokartsupply.com/sprocket.htm

p.s. redsox, read this, good info on roller chain, http://www.gizmology.net/sprockets.htm

 

[redsox985]

Ah, yes. I've been on there before. #40 and #41 are interchangeable although #40 is stronger.

 

[r97]

40 is wayyyy stronger,http://gokartsupply.com/chain.htm

 

[metalthrashinman]

Watch your gear ratio. I had a 10 tooth front and 40 tooth rear with 18" tires, and was smoking belts and overloading my Tav2 30-100 to the point that it would stop shifting. Switched to a 54 tooth rear, and now is much better. Actually made my top end speed faster with lots more low end because the TC is working better now. I am considering trying a 60 tooth rear now because it still gets hot and does not shift after 1/2 hour of really hard riding.

What do you guys think of switching to a 60 tooth? Is it worth the trouble and $ for 6 more teeth?

 

[Blazkowiez]

No, these sprockets do not all match. Often times there are sprockets which have greater width and can not run 41 or 420, also 428 rarely rides on these common sprockets as both the links and rollers are thicker. Do not assume that your sprocket will run any type of chain if its 1/2 pitch. Also bicycle sprockets typically are so narrow that it will not hold torque under high strain if you use a chain that is too wide.

 

[Doc Sprocket]

Watch your gear ratio. I had a 10 tooth front and 40 tooth rear with 18" tires, and was smoking belts and overloading my Tav2 30-100 to the point that it would stop shifting. Switched to a 54 tooth rear, and now is much better. Actually made my top end speed faster with lots more low end because the TC is working better now. I am considering trying a 60 tooth rear now because it still gets hot and does not shift after 1/2 hour of really hard riding.

What do you guys think of switching to a 60 tooth? Is it worth the trouble and $ for 6 more teeth?

I wholeheartedly agree. My tires measure 17.5", and I was at a 4:1 final ratio. I regeared to 4.8:1 and actually picked up top end speed for the same reasons. Could probably safely go a little steeper, even, like 5:1. And 6 more teeth WILL make a difference. It may not put you exactly where you want to be, but it will make a difference going from 5.4 to 6:1. You may, in this case lose a little top end, but you will gain takeoff ability, and your CVT will thank you. Lots of variables though, mainly weight. Only testing will tell.