MC28:

Cyl A - 54.008~54.011
Cyl B - 54.004~54.008
Cyl C - 54.000~54.004

Pis B - 53.966~53.969
Pis "" - 53.962~53.965
Pis D - 53.958~53.961

So there you have it. Strange lettering system, but that's Honda for ya.

When I raced the 28 we had B cylinders and used B & D pistons depending on the circuit. B (tight) pistons for short, point and squirt circuits and D (loose) pistons for circuits with long straights. The idea being that the tight pistons would give good comp, so good drive out the turns, whereas the loose pistons were good for flat in sixth for ever straights. The pistons could get warm without fear of nipping up, which may have happened if we ran the B pistons on the flat out stuff.

Never had a failure.


Last edited by Matt@TYGA on Mon Sep 10, 2007 1:28 am; edited 1 time in total