ok me and my buddy got into it today. He has good knowledge when it comes to cars but what he just said today just blew my mind.

we are doing a project, building a go-kart out of my old FZR 600. He tells me that we are going to use smaller rear wheels on it and to make up for the gearing we are going to put a larger rear sprocket on it. I told him that thats going to kill the topend and be the opposite than what we want.

someone please back me up on this. TIA

 

Exactly....with small wheels you will not need a large rear sprocket. but with too small of a sprocket youll be doin like 150mph

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eyewitness &raquo;</TD></TR><TR><TD CLASS="quote">Exactly....with small wheels you will not need a large rear sprocket. but with too small of a sprocket youll be doin like 150mph</TD></TR></TABLE>exactly what i was trying to tell him, i even demonstrated it on a mountain bike but hes to thick headed

 

You are right. But, how fast do you want to go in a home made cart?

If you know what the top gear in the transmission is, then multiply that by the redline to find what the max rpm's are on the output shaft. Then measure the circumference of the tires you are going to use. From that you can figure the rpm's at the top speed you want. If the motor can turn 12k and the tires are at 3k at your planned top speed, then the rear sproket needs to have 4 times as many teeth as the front one.

Don't forget to make sure the brakes work too.

 

this sounds like a rerun of junk yard wars,,,

 

why such a big engine for a go cart .... i would think a 250 would be big enough

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stripped Honda &raquo;</TD></TR><TR><TD CLASS="quote">why such a big engine for a go cart .... i would think a 250 would be big enough
</TD></TR></TABLE>

*****!

 

thats like saying why make your car faster when it runs 12's.. 250 is enough but how much fun is that!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sackdz &raquo;</TD></TR><TR><TD CLASS="quote">

*****!</TD></TR></TABLE>

LOL

 

the reason is because i already have a 600 motor and all the wiering from my crashed bike