Hi i have a TR1
with first generation Hitachi Carbs
I have recently cleaned up the carbs replaced the diaphragms ( one had a rip ) and generally cleaned the carburettors up
and  replaced the air-filter with an external K@N filter
its now backfiring on idle with the pilot screws 3 turns out and im pretty sure its just on one carburettor
( whats the limit on how many turns out on the pilot screw 3, 4 ?)

the bike ran ok before the rebuild ( even with the holes in the diaphrams !!!)
and I do understand i have changed the air filter to more  free flowing any
advice on what to do next would be great thanks J

ps i do have 2 new 36mm mikuni vms that were for another project would it just be better to start again with  Mikunis ?
J