i have just bought a clutchmasters 8lbs flywheel but they sold me one for a sohc instead of a dohc. so i'm taking it back. which one sold i get or should i stay with brand. what are the gains if any?

 

Clutchmasters flywheels are made by Fidanza, pretty much the premiere aluminum flywheel company. I'd stick with CM.

 

chromoly flywheels

 

Fidanza/CM Chromoly is fine too, though they're often heavier &/or more costly and unless you're making massive amounts of heat(metal clutch) unecessary.

 

chromoly flywheels wont break apart like the ring gears on clutchmasters etc....

chromoly flywheels-toda, jun, spoon etc

 

I have a Fidanza. I don't hear about many of them breaking, nor do I hear about many CMs breaking, this doesn't mean it doesn't happen. I believe Jun flys have had problems with teeth being eaten either on the fly or the starter. None of the companies you mentioned are cheap either. By default I go with the company with the best product/reputation @ the lowest cost. When I bought mine that was Fidanza IMO. Your milage may vary.

 

Does anyone have experiences with Aesco? I heard great things about them as well.

 

Spoon seems good. Chromoly, 4.2kg = 9.24lb. @ $350.00