OEM for CBR/R1/GSXR etc are usually Mikuni CV or Keihin CVK.
FCR were an upgrade for sports bikes but generally not OEM.
That was going to be my next tack, I was pretty sure I'd never seen a proper flatslide on any of them only CV type carbs. But if they did come with flatslides, from my experience with MX bikes they would be limited in tuning potential compared to aftermarket ones.
btw turn69up, I think it would be possible to do a set of ITBs for $500, though more like $1k if you use an ECU you don't have to build yourself.
i see, was wondering why i couldent find 41mm downdraft FCRs for under a grand so i went r1 Mikuni's for $200
You sure the Hyperpak ignition works with a small port dizzy? Any links/info?
Yes they need to know if its the 4 wire (small port) or 3wire (bp) dizzy when u order, in the link i put up before i think it says somthing about it
I've been running R1 carbs on my very tired 4AGE for a while now, from actual experience of doing it they're a pretty good thing. Agreed they're not as good as a set of FCRs but they definitely don't cost half as much. All the ignition setups already mentioned are all good, I'm looking to revert back to a hyperpak + standard distributor, as for the moment I'm running a mechanical advance dizzy. Seems to work alright.
Keeping in mind my 4A is smokey, in serious need of a rebuild and the only tune on the carbs was done by myself with no prior knowledge of tuning CV type carbs - the old girl managed to out lap a silvertop 20v clubman around Symmons, pull away slightly on the straights and also pull away from a freshly built smallport in a panelvan.
I drive it everyday, it's an asshole to start when cold but once it's warm it starts and runs almost like an EFI car. There is some videos of it below. If you've got the resources do it! But get to know your local motorbike workshop/tuner, they will come in handy for jets/needles/etc and maybe some good advice.
SHIT JUST GOT REAL!
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