SC500 cylinder on ebay, auction [or buy now] 230980144565, about 60 odd other sc related bits in his other listings too although some might be mx250. Saw wellington [thinking nz] but is 'wellington ohio' by memory. Cylinder is probably the last thing you'll need now anyway, plus it doesn't say what oversize its on. Hope you get an original airhose so you can use original airbox set up, don't recall any issues with them in that respect except if the base is riveted into the airbox housing it might pay to seal that part really good into the box as had problems with all the early yz's getting dust bypassing the filter. Also , [in my opinion], don't be tempted to lean it off 'too much' to try & get it to carburate clean like a trail bike as they were prone to seizing if leaned off in the midrange. Might pay to carefully eyeball the slide needle jet [emultion tube] where the needle slides as tend to get egg shape worn over time & then run super rich midrange or load up on the start line so you end up sitting there constantly revving it to clear it's throat, [then of of course the flag drops as you close the throttle!!]. Don't be tempted to leave the ballancer out [if you have it], just makes it horrible [did that for a bit, then put the chain back on]. Anyway, enough bullshit, 'hope she all goes well'.
