Mikuni - Kehin jets

[Sorelegs11]

I know this one is a long shot but is there any comparison charts in regards to mikuni and kehin jet sizes.

 I have a kehin that runs good but not "legal" and would like to put a new mikuni on my yam 250 dirt tracker.
Ran the sizes listed in a haynes manual and fried thpiston /rings after 3 laps.

It would be interesting to see what the compatable jets where.

Cheers Darren

[GD66]

Some info here for Mikuni, mostly VM roundslides. You haven't said what sort your 250 Yamaha is (2T or 4T) or how old, but have a peek.

http://www.braigasen.com/Mikuni_jetting_chart_two_stroke.htm

For what it's worth, there is bugger-all difference in the hole size of the two makes of jet but of course the threads are different so they are not compatible.

[micks]

hope this can help http://huntertoolup.com.au/forum/viewtopic.php?f=10&t=82

[GD66]

Wow, good find !

And that's my theory shot fair in the ar5e !

[Sorelegs11]

Good stuff
Thanks Darren