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The HSR42mm Mikunis are overkill. You need to jet them down so far it is a waste. You also need to completely disable the accellerator pumps too. These are the same carbs pretty much all the serious flattrackers run too, but they also run WOT all the time.

I am working on a set of 36mm flatside Mikunis and will probably offering them as kits in the near future. These do not have accellerator pumps either, but have the holes so they can always be added later.

The Amals are just like the old Amals, leak, flood, poor fitting bits, stay away.

The 39mm FCRs are very nice, if you just won the lottery. But you have to be careful as they will flood the motor from a dead stop if you give it even a little too much gas. This stalls the bike, it's embarassing and potentially dangerous if the car behind you runs you over before you can restart and get away. This is a well documented issue with them, they are more for serious road racers than road warriors such as us. But I bet they would be nice to have a set, If only I had a spare $2000 sitting around.

I cannot say for sure anything about the other CR carbs out there, but a lot of guys have them and seem to like them.

There is an old Norton guy (racer, rebuilder, restorations) near me I ran into the other night. He told me to come over to his shop and we can talk carbs. He seems to think that a set of the DelToros would be ideal for my Speedmaster, I'll keep everyone posted on that subject later.

Me, I'm most likely gonna go with the Mikunis for my bike once we get them in and dialed in. Ed already has them and his bike is almost as fast as mine, and he is still at 790cc!



Thanks for the reply, I'm very intrested in the flatslide's you plan to offer up. Any idea of a time frame on this...?

Maybe you need someone else to test something for you...? ;-)

SC

http://www.sccinc.us.com