Hey rcosmax,
in the manual for my OS TR(p)-T 5 port it shows a few OS TR models
OS TR
OS TR(S)
OS TR(P)
OS TR(p)-T
OS TR(p)T E spec with 11a carb ... is this your engine? if so what color head do you have on it? and how many ports is it?
i would assume you would have to lean your bottom end more that a little! i would reakon you need to lean it off half a turn if yours is overly rich like mine! but if you do that your engine temps will go way up!
Can these motors run at 270-300 without damaging the internals?