Question on Ratio of Gears

[bda28590]

I have 17" rideing lawn mower tires and a 6.5hp engine and 12 teeth on the clutch and 60 teeth on the sprocket of the drive shaft it seems it does ok if i take off slow but it smokes its butt off after going it has good power but just trying to save the clutch from burning up or i heard of a tork converter can you make one? and if so what would i need for the ratio? also im useing a light frame its from a rideing lawn mower

 

[Kenny_McCormic]

Unless you have a machine shop at your disposal you cant make a CVT.

 

[bda28590]

oh, also one thing the chain keeps comeing off and it can be tight as heck on it and now the clutch is a little sloppy and i tightend the bolt on it thats in the middle of the shaft and its a brand new clutch any ideas it seems like i get closer at getting done then something else goes wrong also where i can i buy the brake and gas pedals? with the arm braket?

 

[bda28590]

Picture of Doom Buggy

Maybe this will help as the pictures show how i have the gears hooked up

 

[kibble]

I don't know if it's just me, but in pic #3, it seems like the engine is at a slight angle compared to the rest of the vehicle, which could explain why your chain comes off. Your chain shouldn't be ultra taught anyway, it should have a tiny bit of slack.

You might need a bigger sprocket on the axle.

 

[Kenny_McCormic]

What siazechian is that? 219?

 

[bda28590]

the chain is 35 length im not sure yea the motor is slighty angled so that would have alot to do with it? the higher the rpm is when it comes off and also would that have to do with the clutch smokeing if its angled and one time i had the chain pretty tight and i didnt want to do that but it kept poping off i didnt know if that would put strain on the clutch because now the clutch feels a little sloppy as in befor it felt solid other how it was when i got it

 

[bda28590]

i thank you so much for getting back with me on this from look at other post on here looks like you know what your talking about so im going to take your advice and i thank you

 

[kibble]

Well, that could be the reason why you're having so many problems. It kinda sounds like the clutch may have gotten damaged from being on so tight.

About the sprocket, what about a 72 tooth?

 

[bda28590]

60 and the clutch is 12 other then that as long as i take off slow ones it gets going it had good power has a kick too it just have to take it easy takeing off

 

[bda28590]

would there be much a diffrent in a 60 and 72?
and also i would have to get a new drive shaft well they are only 15 dollars but stuppid me i welded the sprocket on the shaft

 

[Russ2251]

View attachment 1694

I don't know if it's just me, but in pic #3, it seems like the engine is at a slight angle compared to the rest of the vehicle, which could explain why your chain comes off. Your chain shouldn't be ultra taught anyway, it should have a tiny bit of slack.

You might need a bigger sprocket on the axle.

When I first tried out the World's First Lawn-Boy Powered Mini Bike, I had problems with chain popping off, especially when turning under power.
I was absolutely sure chain and sprockets were aligned.
WRONG. I tried to use line of sight for alignment but discovered that using this method is just not good enough when dealing with long lengths of chain. To check alignment, use a straight edge against driven sprocket and see if chain "runs out".
My artistry skills aren't the greatest, but here is a lame attempt at showing you what I'm talking about. In this pic, engine would have to be shifted right or driven sprocket shifted left to align.

 

[bda28590]

makes sence on that i thank you that was a kool video really good job on it i hope when i align the motor the clutch will stop smokeing lol my luck it wont it smokes like a motor with bad oil rings

 

[bda28590]

other then that from makeing it out of a rideing lawn mower to this for my first time i guess i didnt do to bad of a job i meen i have rode on it and im still alive lol

 

[2or3wheels]

yeah i dunno what do you think is your top speed? If its higher than 30 it may be that your geared to high and need a 72.

 

[bda28590]

probally 35 40

 

[Russ2251]

Smoking clutch means it's badly over loaded. Need smaller tires/wheels or larger driven sprocket.

 

[bda28590]

and a new clutch too lol and sad thing i just bought it last week only if money grew on trees

 

[bda28590]

also i have on it is 17" tires so that is probally big for it

 

[Russ2251]

I have 11.5" tires, 72 tooth driven sprocket, and 17 tooth clutch. Clutch only gets warm to touch. Kart will do about 50 mph on open road.