Honda-SOHC

if you were nearer the midlands, I would have said try my brother (shameless plug  ) has had some of the bikes he's painted for people appear in streetfighter magazine for example. has done most things from monkey bikes to gsxr race bikes. you could always come for a day at alton towers, dropping your stuff off enroute then come up here again when done  lol
here's a pic of his bike he's been hooning around on this sumer, z650 with gpz1100 motor 
if you are going to NEC classic bike/car show in a couple of weeks, he'll be there with this very bike and you'll also be able to say hi to me  I'll be running old skool performance stand 

what is the largest size pistons that can be used in std (over bored) sleeves, also how much bigger sleeve can be made to fit? all for 550 motor. anyone done similar or have links for me?

I'll try and did out a pic of mine when I had it  do like the xs wheels, they go well

between uttoxeter and alton towers to be precise 
been pointed in this direction by steveD over on another sohc site. well I've had an on/off affair with honda's (sorry to say I've ventured to other jap makes  ) it all started back in '85 when I passed my test and got my first big bike (just after I sold my x7) a CB500/4 it was a bit of a shed but me and my brother tarted it up a bit, treated it to a new Alpha 4 into 1 it already had non std stuff on, like ducati alloy rimmed 18" wheels with iron discs, so it didn't phase me to fit a (if you are a purist please stop reading now, it will get worse  ) square head light off a k*wasaki, and when a seat couldn't be found it ended up with a xj550 seat and tail piece told you to stop reading  ) due to missing an air filter, a rummage under the bench turned up some alloy bellmouths  so that's how it was for the 2 years I owned it. then I brought a 750/4 but didn't like it as much (specially as the cam split/sheared in half and I had to limp home on two. did it up, but whilst sourcing bits, my brother lent me his yam and my head was turned.