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Several customers have inquired about these recently, so had a few made...
I believe there are several members running these (not from me, but lightened nonetheless) with success.
RC51Parts.com :: Lightened Flywheel
Reduce the rotating mass of your engine with a lightened flywheel.
I believe there are several members running these (not from me, but lightened nonetheless) with success.
RC51Parts.com :: Lightened Flywheel


Reduce the rotating mass of your engine with a lightened flywheel.
- Stock flywheel mass = 78oz (~2300g)
- Lightened flywheel mass = 67 oz +/- (~1980g)
- Rotating mass loss = 11oz +/- (~320g) or approx 14%
- Outer diameter machined a reduction of 5mm
- Fully balanced
- Fits SP1 & SP2