Hi guys I am hoping someone here may have already gone down the path of jetting a Mikuni VM30 (Not VM32) on a single 250. I have a VM30 and a few jets etc as per below but the bike its was off was an 1100 so more than likely too rich, 2 x needles and jets: 6F5 (needle jet for this in the carb I have not removed it yet) 6DP4 with needle jet 166-Q2 4 x main jets 195,200,250,330 2 x pilot jets 025,030 I was hoping mikunioz would be helpful but it was like I asked them for the winning power ball numbers, because it wasn't an variation they had int he system they really struggled to give me a starting point which was disappointing. Yes I can go straight to a VM32 for a starting point for an extra $200plus dollars but I thought I would use the power of knowledge on the internet first fingers crossed cheers steve
Welcome to the forum. The only issue with using a carby off another bike is the jetting could be changed to suit that bike, compared to the Mikuni factory jetty for that carby To use it you may need to change everything back to standard VM30/32 spec's and tune it from there, may need to change the air jet, slide (throttle valve), slide needle (jet needle), Needle jet (emulsion tube) main and pilot jet's, also possibly the float level
Yes I am expecting to do that, however there is no factory setting for a mikuni vm30 on a single 250, I am after a starting point where someone has already had a shot at this, failing that I will start some trial and error with what I have working on the basis that I am too rich on main jet and needle/jet and dial back when/if I order more jets etc.
Latest Mikuni VM30-83 Specs Standard Jetting Specifications Main jet (VM4/042) 250 Pilot Jet (VM22/210) 40 Needle Jet P-5 Jet Needle 6F5 Throttle Valve 2.5 Air Jet 2.0 Needle Valve 3.3
As always, try it (it may be closer than you think) and see what is needed before buying any new jets.
Ah cool this is what I was chasing over the phone this morning, I am not sure why it was such a mission, now I can start to play and move from there, really appreciate it cheers