lightened flywheel

[donfjohnston]

how much can one lighten a flywheel and still have a reasonably smooth idle...228mm 300 m sport cam weber 38/38

[Tommy]

Flywheel isn't a big factor regarding idle. If your carb and ignition settings are good idle will be fine. Because of the cam it may require some more revs.

Tommy

[granth]

Is it safe to lighten the stock flywheel? I assume that it is a cast unit, so when you remove material and spin the motor at higher rev's would the flywheel not want to come apart like bullets?

grant

[Senna27]

Is it safe to lighten the stock flywheel? I assume that it is a cast unit, so when you remove material and spin the motor at higher rev's would the flywheel not want to come apart like bullets?

grant

Can't remember how much I lightened mine but that was 20 years ago and it's still in one piece!

[granth]

Can't remember how much I lightened mine but that was 20 years ago and it's still in one piece!

Was that for a racing application? and what kind of Rev's are doing?

grant

[Tommy]

There are both cast and steel flywheels in m10's. Later are cheaper cast ones but I don't know when they've changed it. If you use the steel wheel it's safe as anything. I've had about 5.5 kg wheel and rev limit at 7200 - no problem. Now I've made a new wheel using 215mm as blank. It's made for 184mm race clutch and weight is about 5 kg. Will use more revs after I've updated rockers.

Tommy

[Senna27]

Can't remember how much I lightened mine but that was 20 years ago and it's still in one piece!

Was that for a racing application? and what kind of Rev's are doing?

grant

I lightened it for street use however I've had it out at the track many times. Lots of continuous 6000+ RPM. No Problem!

It has little or no effect on idle. Revs freely though!