Bultaco Sherpa 199 Engine Needs Settings

[bul159]

hello everyone,I will try to be clear (my english is not so good).

I have a brand new pre jetted mikuni vm26,needle clip is in 2nd position,new ignition stator(wich comes from a 175 lobito,I believe they are the same but is it ok?) 2.4mm advance timing.new piston rings ( stock bore).

The bike doesnt run fine and has no power in low rpm in the first 1/4 of throttle.(a bit like a motocross).idle seems to be good,bike starts good 2nd or 1st kick.

I would like to know what are the measurements/size of the intake manifold for a 199 (cylinder side not carb side),and what could be the cause of a bad reving.

Thanks a lot for your answer.

Edited January 6, 2010 by Bul159

[kttwofifty]

I think your carb is too small for a 350. I tried a 26 and the bike felt feeble and ran hot. I couldn't get a 28 Mikuni, so went to a 30mm set up lean. Voila....great low end snap that you could really notice. Try a 30.