3hp flywheel on 5hp motor?

[bigmike1463]

so here is my question other thatn rpm's what would you gain?
do you loose torque?
I see many people putting billet flywheels on the bikes and some putting smaller(3hp on a 5hp motor) but why?
Mike

 

[bandit 40]

so here is my question other thatn rpm's what would you gain?
do you loose torque?
I see many people putting billet flywheels on the bikes and some putting smaller(3hp on a 5hp motor) but why?
Mike

I believe this is done to free up RPM'S ,for instant power like using billet aluminum flywheel and rod, that lightens up the rotating asembly:smile: but im not sure about torque

 

[Strigoi]

you'll lose some "torque" when going with a lighter flywheel due to less rotational mass.

 

[bigmike1463]

so the only real purpose of going "lighter" would be for top end the bike I am building is more for hill and soft dirt so heavier would be better right??

 

[Strigoi]

the motor will wind up quicker with a lighter flywheel. they're more for top end though.

it's also a good idea to go with a billet flywheel and rod for safety if you aren't running a governor.

 

[motor_head]

just makes it rev up faster

 

[~JM~]

Reduces rotating mass to allow a faster throttle response.

I believe the key-way is cut in a different location & advances the timing.

 

[INJUNTOM]

Anybody done it?

 

[~JM~]

Anybody done it?

I think the Go-Kart & Jr. Dragster guys have, plenty.

I have not been able to find any posts on the topic other than the occasional eBay posting.