Hi
New member here. (just got my nc 23)
My problem is.....It will tick over but rises from 1000 to 3000 then falls to 1000 the back to 3000 continuously !
I have cleaned the carbs, jets etc BUT Im confused re the jet sizes ? according to the engine number (NC23E 1035719) it is the "J" model BUT the jets in the carbs are 35's ? not 40's. these I believe were the jets from the Nc29 CARBS, i DONT KNOW IF THEY ARE THE ORIGINAL CARBS.

ARE THE PILOT SCREWS TWO AND A QUARTER OR TWO AND A HALF TURNS OUT ?

Any help much appreciated.

Thanx

You're right with the jet sizes j is 40 , kis 35. Haynes says 2.5 turns out for pilots!

Perhaps the carbs need balancing?

Thanks for that. Ill try 2.5 turns rather than 2.25 and Ill balance the carbs
I have a two gauge set so I think its 1+ 2 then 3+4 then 2+3 should do it.
cant wait till shes all done. will be more fun round the twisties than my 186bhp Blackbird I think lol

So after having the carbs off AGAIN AND AGAIN !!
It now ticks over at 1000 rpm, steady as a rock ! carbs balanced, 2.5 turns out on the mixture.
its actually smoother than my blackbird !! (injection)