DT125R ARCHIVE

bkray · DTR Senior Member

DEP expanny

the only way is YAMAHA DTR · Guru

240 is standard on my bike (flat slide carb) so not sure why yours is 215

also was the pipe new and what silencer did you have

bkray · DTR Senior Member

yeah, i got a mikuni flat side, not sure why its 215, but its been running good so far. will probs put the 240 in tbh. the pipe wasnt new. >.> got it off another dt125. i de-coked it though. and its look fine. also sounded fine.... ive got a dep end can.

the only way is YAMAHA DTR · Guru

sounds like it was lean , two strokes can over rev if they are lean, but also are hard to start after being ridden hard

GADGET · Guru

what year is your carb ????

old dtr 1990 to about 1996 has vm26...carb and a 210 standard main jet

newer dtr/re/sm 1997-on etc has vm28...carb and 240 standard main jet

if its an old carb you were lean on main jet for full dep

if its a newer carb you were very very lean on main jet for full dep

deffinatly sort your carb before running the full dep again or your gonna be in the same situation

hope this helps with the years of carb /jets/pipes issue

good luck and let us know how you get on and the size of ya carb smile smile smile

bkray · DTR Senior Member

erm, dont know what year my carb is... but its got a 210 main jet in it. and its a mikuni flat-side. sorry i dont know much guys. my bike is an 90 so im assuming its got a vm26. what shall i do to make it run good again?

GADGET · Guru

1990 vm26 full dep ...try 220-230

and clean air filter and oil it

also check your oil pump and cable just to be safe

im running 1990 bike vm26 bigone spanny oldskool dep rear 210 main jet and its a little lean at about 7k revs so im gonna up it to 220-230 after iv played with the needle position to put the power where i want it

just to be sure measure the hole in he middle of yer carb

mammoth200 · DTR Senior Member

260 works perfectly fyi :)

GADGET · Guru

260 works perfect on the newer dt's but he has a 1990 so has the smaller carb

what year is your bike mammoth ??

-- Edited by GADGET on Sunday 3rd of July 2011 12:18:17 PM

mammoth200 · DTR Senior Member

Mine's an '03, 28mm carb, agreed though, didn't read the thread 100% lol apologies, 230-240 would be better suited.

Kinda makes sense, when I originally started looking around for up-jetting info when I first got the bike, most folk kept telling me I should up-jet to 240, when I already had a 240 in there. So went up to a 260 and jobs a goodun :)