The person who I picked up my mc16 from said that they dont think the carbs on the bike were the original ones.

I see on the jet settings page that the carb is supposed to be a TA10A

The one I have is a Keihin and on the side is stamped "TA 10 A B(with a block around it) A K t(mirror japanese character)"

Now that could be interpreted as TA10B because the B is "selected".

Also what are the intake chambers for? I cant really see how anything is put in them, they are just connected to the top of the intake "manifold"

EDIT: I also have got another set with the bike, disassembled, stamped "TA 10 A A(with a block around it) A J Y(japanese character)"

Thanks
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Suzuki RM125W
Honda NSR250 MC16

the chambers lengthen the inlet length creating more torque and hp at lower revs. they also absorb negative pulses when the reeds are closed stoping blow back and keep mixture flowing in one direction .

you can probly get a bit more top end which is good if u plan on keeping the engine above 7000rpm but not if your not.
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Honda nc23 CBR400 AERO 1986, 1990 honda NC23 Tri-Arm, 1987VFR400 NC24 Rothmans Rep, NSR250 MC16 1987, CL250s 1983. Moto guzzi zigolo 110cc 1958. Fantic 50cc 1972. Suzuki Cobra Race bike 500cc 2t 1975 , GP125 1975. Triumph T110 1954. BSA Thunderbird 1955. Ariel VB 600 1952, 1990 MuZ 125 etz.