Originally Posted by
look no hands
So what you're saying is if the bore had been 25mm on the Theoben then it may have made power easier? I think the other thing is the weight of the piston (heavy) and the piston seals aren't the best and are pretty hard, so probably don't seal very well (so power is lost there as well), not sure what the TP sizes are or what the stroke is, if it was easier to put together and take apart then I'd muck about with it more but trying to get the spring in with my spring compressor and then getting the circlip in place is a pain, it's even worse trying to get it out, what makes me chuckle is that a lot of the shed tuners always seem to revert to O ring heads when doing reduced cylinder conversions, so the Airsporter/Merc heads can't be all that bad, I agree they run better with the Meteor O ring.
Pete