34mm flatslide mikuni

nobby1 · Number of posts: 26 Registration date: 2007-12-22

hello, could anyone give me some idea what size jets and needle sizes i should be using as a staring point for a 34 mm flatslide mikuni on a 175 cc engine comp ratio 12.5:1. whats installed seems really over the top. thanks scratch

alan · Subject: Re: 34mm flatslide mikuni Sun Nov 01, 2009 8:16 pm

Hi Nobby,
Which Mikuni flat slide is it? TM or TMX ?
Should be able to give a ssfe starting point then.
Cheers,
Alan

nobby1 · Number of posts: 26 Registration date: 2007-12-22

alan its a tm 34mm

alan · Subject: Re: 34mm flatslide mikuni Sun Nov 01, 2009 8:46 pm

Hi Nobby,
It is a similar basic carb to what I use, the jet numbers do seem to be high on that model, but do not be put off! I think you will have a 250 jet fitted as standard, but if the bike goes well you could be up in the 280 to 290 region. I would fit a 280 and expect it to be very rich on full throttle to begin with. At least you will be safe! work on bringing it down steadily.

The TMX jets are down in the 180 190 numbers and bear no relation to the ones you have for that carb.
Cheers,
Alan

nobby1 · Number of posts: 26 Registration date: 2007-12-22

cheers alan thanks for the info.