im new i need help with gettig more speed

[freeman508]

i have a 1972 Suzuki tm400 engine on my go kart it has a 13 tooth sprocket i need to know the best rear sproket that i can use to get the best speed it has 6500 rpm 5 speed and im new to building go karts and i like to rde street so i need to know wat size whells i need ans lots kmmore ht me up

 

[freeman508]

oh its got 40 hp

 

[sideways]

Do you know what your top gear ratio is? But really any wheel size that is similar or smaller than what the bike had will be fine.

What speeds are you aiming for? How heavy is your go kart? And what surfaces are you going to ride on?

Thanks

Hayden

 

[freeman508]

i want the highest i can (reasonable) like 100mph and i dontwant to put 55" tires on it my whole kart is 120pounds and street most of the time

 

[freeman508]

im racing it on long sreches probaly with minamal turns

 

[modelengineer]

LOL 100mph. You're crazy, where do you drive it at speeds like that?

Either way if 100mph is the target you're going to want to know the exact ratio's in your gearbox and gear it so the engine reaches max RPM at 100mph. That way you get your 100mph top speed with the maximum acceleration possible.

B.T.W you're crazy.

 

[freeman508]

ik i have it a 6000 rpms

 

[freeman508]

i can do 93 but i want faster

 

[freeman508]

and the funny thing is im 14

 

[freeman508]

so u guys got anyadvise

 

[freeman508]

like tire siz gearing

 

[r97]

I'm guessing you have a racing chassis

 

[freeman508]

nope home built

 

[r97]

your crazy, have you gone 93 in anything home made yet?? send us some pics and maybe we will see why 80 is reasonable.

 

[freeman508]

yeah ive went 93 i just drive it on the road but i takes a while to get up speed and im getting a new carborator 4 itso ill send u guys some when its back on

 

[freeman508]

but can i have some suggestoins on gearing
and tires plz

 

[fowler]

basicly bigger tyres and bigger rear sprocket
but like model kinda said u can acheive that high speed but if the accelaration is crap then whats the point

 

[r97]

just gear it really low and have fun burning the tires instead of getting run-over by an suv on the street going 90, way more fun that way, if i really wanted i could prob hit about 90 but whats the point cause ill end up driving of the end of a runway before i hit 60, pics? i wana see what your hiiting 95 in

 

[redsox985]

First, how have you clocked your speed? Secondly, you wanna jump from 93 to 100mph? Put on tires with a 1" larger diameter.

EDIT: See that edit post button? It eliminates the need for 5 posts each with 5 words.

 

[freeman508]

ok ty 1" bigger and i went to a dyno place down my street theye do it 4 50 bucks