Just got my F1R 12.7 pounder.
I'll be having its balance checked tomorrow.

I got the 11 lb one, I have about 450 street miles on it and about 100 "aggressive" miles on it, about 60 of those being at MSR houston, I am loving it, revs a little quicker and with the 6puck clutch it came with it shifts like a beast.

Took mine to the track this weekend, eveything broke but this flywheel.

Haha damn that sucks but also good too

Well I got it (F1 Racing 11.7 lb flywheel) back from the balancing shop.
Balance was within 0.5 gram which is their limit.
So was the FM stage 1 clutch's pressure plate.
So was my crank which I had balanced 5 years ago.

^This. You cannot reuse your old PP bolts.

10.9 Hardware store or bolt store are necessary.

BTW - I've had mine for eight months and I wish I went even lighter on the weight.

M8 x 1.25 x 20 mm bolts fit perfectly if you reuse the factory lock washers, despite being 2 mm longer than stock.

why 10.9? it's only torqued to like 20 ft lbs

I didn't know the torque value for one thing. As long as I was in there and there was a negligible price difference, I was using good quality components, especially for drivetrain parts. I'm not sure it was necessary, but I feel good about it.

Well 1500 miles later the flywheel and FM1 clutch work great.
Initially the FM1 clutch engaged way down near the floor even after their recommended adjustment procedure which maximizes stroke. (before procedure it wouldn't disengage and I got a bit of a panicky feeling). After about 200 miles it broke in some and got much better.
Clutch feel is good. Not too heavy underfoot.

Flywheel feels "pleasantly" lighter than the de-ridged (lightened) stocker, but not hugely so. The engine revs smoother than before (may be because it doesn't have a weak #2 cylinder lol).

I was considering getting my stock 1.6 flywheel lightened but the shop wanted liek 250 ish for it i was like mmmmmm wait on that.

I ended up ordering clutchnet performance disc with street pp and a f1 flywheel.

I may have the shop balance the clutch kit and flywheel but i'm not sure how to have the disc maintain its centralized position. would it make sense to leave the alignment tool in place? should the shop worry about that not me haha??

I would highly recommend that you do not get anything from clutchnet. Ask Braineack how he tried to cheap out and ended up doing a clutch job 3 times in a week.

Really? Scott, wanna chime in?

Shuiend is an alarmist IMO. I've had several Clutchnet clutches without issue as well as dozens of other on here, including during that GB. Brain and I think one other person just had some bad luck. That could happen with any company. I wouldn't label it as a regularly occuring issue.

There were far more then just 2 people during the groupbuy that had issues. All I can say is changing a clutch is a PITA. I rather not skimp out on a clutchnet clutch and have to redo it anytime soon. The extra money for a ACT or FM is well worth it to me.

yeah, back in 2008 we did a GB. like half the PPs that us members got wouldn't disengage. It was at least 5-6 members. Newbsauce was one.

I kept the disc, returned the PP for a refund, and bought an ACT PP...had no issues after that.

Clutchnet=F1???

I bought an F1 clutch and flywheel kit from Gripforce. The PP wouldn't disengage. I've now used the F1 1.6 light flywheel with both an ACT PP/stock disc and a full ACT HD pp/disc with perfect results. What Lars said, I wouldn't do a cheapie PP/disc again.

My twin plate clutch organic disks were made by clutchnet. For all their inability to coherently convey information I wanted, the disks were produced and worked flawlessly.

Any more news to report on this? How is it wearing in? How have you been treating it?

I am currently running on the FM "heavy" flywheel and FM1 clutch after swapping out the twin plate clutch for a more daily drivery feeling car.

So far it's holding the ~250whp just fine and is a lighter pedal than my wife's civic's stock 100k mile clutch pedal. engagement is wherever I want it. Currently about an inch off the floor and there's more available.