i stripped the carb,the choke seemed to be working last time i had it running as when i pulled it on it just killed the engine,pulled the motor out again today as im convinced there is an issue with seals or some tranny leak into the combustion,i took it for a run over a local bit of land lastnight and the gearbox has issues,1st 2nd fine third a vague(all gears are there just temperamental) and it locked up 2 3 times where i couldnt even select a gear.
when i rebuilt it i replaced the gear drum and gear change mech cos they were shagged,since then i bought this 87 motor for spares(wish id waited before spending money on gear drum and gearchange mech) and the box and selector forks in that look good and are same as my 88...so its another reason to pull it apart anyway and sort that out.
I give up trying to source the valves dave,tried everywhere,mine are useable just worn,i will pick up the search again after ive got the bottom end sorted the bloody thing running right.