Home made flywheel weight?

[BigMattyG]

Has anyone tried to build their own flywheel weight? I'm thinking of cutting out circle out of half inch steel plate, drilling and tapping a hole in the center the same thread size as my flywheel nut and threading it on there, then I can have it turned down on a lathe if its too thick or heavy? Any input or anyone done anything similar?

[uuhhhh]

I'm sure someone has, and I'm sure someone made it work, but all of the machine work should be done on a lathe to ensure concentricity, as even a slightly out of round FWW will shake the bike apart. Also, IIRC flywheel weights have a male thread and use set screws to lock it down, so using a die to cut threads, and even using 1/2" plate would be difficult.

[powermonger525]

I built one out of brass

Works great

But like the last guy said you have to do it right or it will really cause problems

I didn't thread it onto the crank

It just slips over (tight fit to center it) then attaches with thru bolts tapped into stock flywheel

[EnglertRacing]

Well... Adding weight close to the axis of rotation doesn't as much effect gram for gram than it would if added to the perimeter of the flywheel.

Keep that in mind.

[BigMattyG]

So larger diameter and thinner walled, maybe thicker on the outer edge and tapering toward the middle?

[grayracer513]

Don't use the weight as a substitute for the nut. You'll spin it off by its own inertia one day.