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[kenworth85]

I am trying to build my grandson a go kart I have 6.5 b&s engine w/1 inch shaft have purchased a clutch w/ 14t also have a jackshaft w/10t it is 5/8 inch shaft the drive axle has 60t can anyone tell me what size sprocket I need for input on the jackshaft also the tires are 16" tall

 

[mckutzy]

Hello and welcome
Whats the tire size....

Off hand to keep the 6:1 ratio.....14t on the input....
Clutch- 14t
JS in- 14t
JS out-10t
Rear sprocket-60t

Here's a calculator to try different ratio's
http://www.affordablegokarts.com/GearCalc.php

 

[kenworth85]

mckutzy thank you I have been reading on this forum for about 2 wks you guys are very well informed my grandsons birthday is Monday he will say thanks too

 

[Poboy kartman]

Thanks for the compliments.....remember...be safe...Coffee is your friend....Speed kills....

And going back a few years (more than I like to admit) ....."Keep on trucking! "

 

[bob58o]

I wish I had a grandpa like you growing up. Maybe then I wouldn't have to spend my adult life playing with toys.

 

[Poboy kartman]

I wish I had a grandpa like you growing up. Maybe then I wouldn't have to spend my adult life playing with toys.

YEAHHHHHH....RIGHT....cool story braa....

My grandfather gave me high powered rifles to play with....and my uncles gave me booze...I'm eternally grateful?

 

[bob58o]

I'm guessing 40/41 chain?
With 16" I might try

14 T clutch
17 T JS input
10T JS output
60 T Axle

7.3: 1
16" Tires
23 mph at 3600 RPM

 

[chancer]

Hello and welcome
Whats the tire size....

Off hand to keep the 6:1 ratio.....14t on the input....
Clutch- 14t
JS in- 14t
JS out-10t
Rear sprocket-60t

Here's a calculator to try different ratio's
http://www.affordablegokarts.com/GearCalc.php

That is a useful link, But I would not go with the 14 tooth. 6:1 is a little to high with 16" tires. Try 15 or 16.

 

[mckutzy]

I say go with that to start... It had worked with me, and I just upgraded to 7:1 with a little better take off....

 

[kenworth85]

thanks for the help I don't know that much about small engines or go karts I'm diesel mechanic
whole new ballgame tried the 14 tooth just about right for my 9 year old grandson