gear ratio

[chadm3us]

i have 72 on the motor and the ? is optional i have a 36 and a 14 then on the other side of the jackshaft is the clutch which has 12-14 teeth i dont remember and the wheel has 72 teeth.

 

[2or3wheels]

ok, the bigger one will give you more power, i recomend taking the 72 off the motor and putting the clutch on the motor, if possible. 72/36 is 2 to 1 72/14 5.14 to 1. then 12 to 72 is 6 to 1 definatly go with the 36 and if thats not eneugh power go with a different set up on the motor.

 

[chadm3us]

i cant change the wheel its 72 then up to my 12-14 tooth clutch on the jackshaft across to either a 36 tooth or 14 tooth and then down to 72 on the motor in my pics the small gear that is shown is the one i can change between the 14 or 36.

 

[2or3wheels]

right, change the 72 on the motor, not the wheel, thats if you cant on the motor, just try the 36 and if that not right then were back yo the drawing board.

 

[chadm3us]

yes i have a clutch i have now put a 36 tooth gear on the motor and 36 on the jackshaft and a 12 tooth clutch on the other side of the jackshaft all are new and the 72 tooth gear on the wheel and it still starts just fine if i jack it up the wheel screams (and immediately broke my brand new clutch) but if i leave the wheels on the ground it goes nowhere and im lost ????????

 

[crazycart]

cant you mount the clutch on the engine?

 

[chadm3us]

i had a clutch for the engine it has a 1 inch shaft and is expensive it did the same thing as its doing now so i went back to the 3/4 clutch because it is about half price.

 

[mikeandike]

are all the sprokets aligned properly? mabe the chain is binding on the sprokets

 

[crazycart]

i can get clutches at northern hydrolics 3/4 and 1 inch for same price

 

[chadm3us]

does anyone know how many rpms a 6 horse briggs motor runs at idle?

 

[chadm3us]

the way all my math adds up i just have too much top end and not enough torque to get it started but i cant find anywhere that has a gear calculator with a jackshaft so im not sure if it adds up correctly or not

 

[2or3wheels]

i think it would be fantastic to get a jack shaft calculator.

 

[chadm3us]

any ideas how to add it up

 

[2or3wheels]

didve the negine sproket and the sproket on the jack shaft that runs to, then the other sproket on the jack shaft to the sproket on the wheel, then you use those in concideration to the wheel somehow., but with the same gearing on the engine and jack ahft it should not matter how tall is your tire?

 

[chadm3us]

19 inches and the circumference is 59.66

 

[chadm3us]

for reference i dont know how accurate but i found a calculator.
http://www.compgoparts.com/TechnicalResources/JackshaftRatioCalculator.asp

 

[2or3wheels]

i tried using it but no speed.