1974 DT250 NeedleJet / Jet Needle

[Economy Cycle John]

1974 DT250 NeedleJet / Jet Needle - what sizes were they?

[jradnich]

5DP7 jet needle. O-0 needle jet.

[SoCal250]

^^yep that's what I came up with.
I see why you're asking John. The Yamaha data for the 250A is all messed up and co-mingled with the 360A.

My records gave me this (after a little cross-referencing and back checking)

DT250A
MJ  #140
PJ   #50
NJ   O-0  I believe this is a 169 type. It is the same nozzle as the DS7 and same type used in the R5
JN  #5DP7
Slide 2.0

[automan]

Just to confuse.

My DT250A, that I believe is stock..

VM30
MJ 150 BUT CAP IS STAMPED 180
JN 5DP7-1LEAN
NJ O-8 (241 SERIES)
CA 2.0
SJ .026"
NV 2.5 STEEL WITH SPRING
PJ 50

Cliff

[Economy Cycle John]

ok thanks guys

[Twill864]

What about a 1975 DT250?

[SoCal250]

What about a 1975 DT250?

This is what I have.
Note: The main may be a #150 or #160, the spec sheet is not clear and there are two parts marked as standard

DT250B
Carb: Mikuni VM28SS (ID no. 49861)
MJ  #160
PJ   #50
NJ   O-4 (169 type) 
JN  #5F21-4
Slide 3.0
Starter jet #60
Air screw 1-3/4
Float 17.5mm