49cc Scooter X Kart 5hp Briggs Swap

[MrNoizyToyz]

gear problem 12t clutch 20t on 3/4 axle, Tires are 5" think this will be a problem??????????? I have pics on my page yall can check out

 

[qtband]

Don't know what kind of torque you'll get, but it should go about 32mph.

 

[MrNoizyToyz]

Thanks qtband

 

[landuse]

Having 12T on the clutch and 20T on the axle gives you a ratio of 20/12 = 1.6666:1. That figure is so insanely high for gearing that you have a major, major problem. No matter how tiny your wheels are, that type of gearing is going to get you absolutely nowhere. Your clutch will be fried in less than 2 seconds, I promise you.

You are going to have to look at a ratio of at least 5:1. With your tyres being so small you can get away with a slightly higher gear ratio than a normal kart. This means you are going to have to get a axle sprocket of at least 60T. The problem is that I don't think you have the clearance for a sprocket of that size. You might have to invest in a jackshaft.

Just my 2c.....

 

[klicky96]

By looking at your pics, it looks like you have a TAV on the engine or a gear reduction unit. If you have a TAV or gear-reduction unit then this will work. If not, it won't.

 

[qtband]

I knew there would be more to this answer!

 

[landuse]

Klicky96 is correct in saying that you have some reduction on your engine. I missed that. This will definately affect gearing , but you will have to tell us what the reducton is (eg 2:1 or 6:1 etc) or if it is a CVT.

If it is a reduction unit, it might even have a build in wet clutch. More info from you is required before we can help out. Maybe post some close up pics of the engine and unit on it

 

[MrNoizyToyz]

I think you guy are looking at at wrong cart

 

[MrNoizyToyz]

 

[klicky96]

Sorry, I was looking at this pic:

 

[landuse]

Having 12T on the clutch and 20T on the axle gives you a ratio of 20/12 = 1.6666:1. That figure is so insanely high for gearing that you have a major, major problem. No matter how tiny your wheels are, that type of gearing is going to get you absolutely nowhere. Your clutch will be fried in less than 2 seconds, I promise you.

You are going to have to look at a ratio of at least 5:1. With your tyres being so small you can get away with a slightly higher gear ratio than a normal kart. This means you are going to have to get a axle sprocket of at least 60T. The problem is that I don't think you have the clearance for a sprocket of that size. You might have to invest in a jackshaft.

Just my 2c.....

View attachment 21630

OK. We couldn't see the business end of this engine in your pics. As this is the engine you are going to use, my post which you see above still stands.

 

[MrNoizyToyz]

Im going to go to northern tool today and see if I can get 8in tires then I can go to a 40t sprocket and I sould be good

 

[landuse]

Im going to go to northern tool today and see if I can get 8in tires then I can go to a 40t sprocket and I sould be good

You should be "better" than what you have now. Your ratio will be 3.3:1, which is still very high. Just keep an eye on your clutch that it doesn't burn up

 

[MrNoizyToyz]

Well I went to northentool and got a 20t sprocket and 12t clutch and guess what,The thing Fly's,I have a seed app on my phone that works like a GPS but its like a digital speedometer anyway it top out at 39mph before I had to slow down to turn, I know it has more,yea,yea faster faster

 

[MrNoizyToyz]

By the way this thing is less then an inch of the ground it kind of scared me lol I think I have poop in my shorts

 

[MrNoizyToyz]

You should be "better" than what you have now. Your ratio will be 3.3:1, which is still very high. Just keep an eye on your clutch that it doesn't burn up

The clutch is working as it should,I road it for about 20min and the paint is still new on outer part of the clutch,on my other Kart the paint bubbled first ride same Hillerd clutch and it has 12t clutch 40t sprocket and 10" wheels that kart tops out at 43mph By the way can Video be posted on here ?