skuddlebug

ok now what about gas ratio? i've heard from 30:1 up to 50:1 for break in then run normal ratio after that

What's the best method to break-in new pistons and ring? gas ratio, full throttle/half throttle, how long? Thanks for any help you can offer.

I think its old and just put back on. the piston looked fine other than carbon build-up and there were no scratches on the walls. and the dome itself was rough as you can tell but it didnt have shape edges, it felt like it has been like that for awhile. as for mods...it doesnt appear to be stroked but it has been bored .040 (1mm) over, 29 mm keihin carbs, fmf fatty pipes, boost bottle, new holeshot HD front and back. as far as altitude....who knows. (east TN) cleared trails and open field riding. 91 is about the highest octane pump gas around here, there are a few with 93 tho.

one more question....I think i read somewhere that the smaller the cc of the dome to more you lose at top end (and also need higher octane gas). is that correct? I had 22cc domes and my top end would scream! I was keeping up with traffic on the interstate but kept bogging down and had to keep it reved up on trails in the woods. so I would like to have a little more low end power but not give up to much on speed.

it has a groove for the o-ring to sit in.

I think you pretty much answed my question. I didn't have any spacers. heres a pic of the one that got beat to death. its not a very good pic tho....

It still has the stock cylinders but when i googled the numbers on the pistons (513m06500) it says they are wiseco 65mm (stock is 64 if im not mistaken)

I am changing pistons and rings. When i took the head off, one dome was beat to hell so now I need to replace them. They say "22" on the side so I am asuming they are 22cc domes. I would like to go with 19 or 20cc domes. It has been bored .040 (1mm) over and is suppose to be stroked 4mm. everywhere i look online you can pick any size from 15 to 22 cc domes or the one for bored and stroked motors. can I just buy a set of 20cc domes and they work? They never say what size they are for bored and stroked motors. Here is a link to an example of what I'm talking about: http://www.motosport.com/atv/product/MODQU...HA;BANSHEE;2001