Ballpark start, VM36 on 250 piston-port engine?

[John Orchard]

Hey Guy's,

I was wondering if anyone could give a ballpark starting point for jetting on piston-port 250 running a VM36?

l have it on a Yam DT1 with ported barrel & expansion chamber. The carb that came with the bike has the follwing jetting......

MJ - 330
PJ - 30
N - 6DP1
NJ - Not out yet :-)
S - 2.5

Any help is appreciated, thanks in advance.

[211]

have 3 250 piston port bikes - '74-76 all run
main 290 - 310
pj45
1.5 on slide

[John Orchard]

have 3 250 piston port bikes - '74-76 all run
main 290 - 310
pj45
1.5 on slide

Wow l didn't even know you could get a 1.5 slide!!!  :-)  What needles Dave?

[facthunt]

DT1 VM36

M 350
PJ 45
Q8
6DP17
2.5 Slide

[John Orchard]

DT1 VM36

M 350
PJ 45
Q8
6DP17
2.5 Slide

Thanks Fatty ;-)  What engine was that used on?

[facthunt]

DT1 VM36

M 350
PJ 45
Q8
6DP17
2.5 Slide

Thanks Fatty ;-)  What engine was that used on?

Pre 70 DT1