Keihin carbs

[Mickey Sergeant]

Has anyone used a keihin carb before.I see they make a 28mm. Just wondering if they are Ahrma legal, and what your thoughts are on them.
Mickey
74 Berkshire

[joe novak]

I have one on my 74 Penton 125.  I have been told it is a 28 mm.   Joe

[brian kirby]

The only Keihin that would be AHRMA legal would be one off a '74-75 Elsinore 125. It has to be round slide all the new ones are oval, D or square slide. The Elsinore did use a 28mm if my memory is right, but its no better than a Mikuni and parts are both cheaper and easier to find for the Mikuni.

Brian

[Dwight Rudder]

Yes, The round slide VM Mikuni is the best carb of the era.  Sadly the newer oval and flat slide Mikuni are not as good as the Keihin. Back then a Keihin was primarily a 4 stroke carb.

[joe novak]

Good point, Dwight.  Any carb which was jetted for a four-stroke might not be ideal for a two-stroke engine.