Just curious if anyone has ever fitted a set. I've seen some 32mm FCRs for inline 4's available and am wondering if its possible to machine up and fabricate some parts to make it work on a V4. If so, what type of top end gains would you expect?

Speak to Luke Miller as he has a set. If you do make up the linkages etc I would be up for a set. Luke has the carb rubbers too, he sent me one to get copied

Lukemillar on here has a set on his racebike heres a link to his thread, its a good read: viewtopic.php?f=62&t=30587

Michael had a set on his insane track bike before switching to EFI: viewtopic.php?f=62&t=4014

They were used on some of the TT-F3 NC30 racers, this is where most of the sets have come from. I have some pics at home that I can put up later.

Gforece racing sold some with the inlet rubbers which they had custom made (hardest part If I remember)

I wouldnt exect top-end gains to be a great deal without some matching engine work, but the direct control of the throttle slide shoudl make the motor more resposnsive if your good with the throttle.

I wouldn't expect much on a stock engine either but mine's going to be worked on by Gforce later on this year. I already have the 57mm pistons.

The HRC ones just seem too hard to get but sets for I4's are available. I was figuring I could draw up a few pieces on a CAD and get them made up. Some detailed pictures of the HRC carbs would help.

Great thread. I read that a couple weeks ago. What a bike I'm going to have to go threw it again.

VFRkieran wrote:Lukemillar on here has a set on his racebike heres a link to his thread, its a good read: viewtopic.php?f=62&t=30587

On a standard engine I imagine you'd get around 3hp in top end gain - at least that's what was discussed in the nc29 forum at the time. Good gains, the sound alone would be worth it!

Some fairly complicated linkages needed on the v4 though.

Couple of pics:

-edited for clarity-

what bout FI?

In the case of g-force they ditched their flatslides in favor of FI right?

Since it's already been done, perhaps it won't be much more of a cost to get some FI done, depends on cost of flatslides of course and rubbers, but i'd look into both options.