hey guys
am gona do total rebuild for my nc23
it was fine and every thing but started to missfire and i did every thing about the fueling system and the carb still missfire at 5 rpm
and start very well when its cold but when it gets hot it like she wana start but it dont
and lots lots of prob

so am gona rebuild it
any advice ???

and i wanted to ask about piston rings ? cause this part i dont get it from the service manual :D

and if any 1 knows the exact size of the cracnkshaft shells or bearing ??

Have you checked your electrical system..

I would test/check in this order...
Spark Plugs
Plug Leads
Coils (my nc23 would not start when warm due to the coils breaking down at high temps)
CDI (kinda hard to test though without a spare)

Have you done the speed limiter mod or do you have a gold CDI?

1st i wana thank u sir for ur reply
yes i checked every thing
now iam rebuildinf it
it turned out to be broken pistons and broken piston rings
and there is leak in the valves
am gona post it in the project section and will put the link here :)