NEED HELP on a yamaha dtr 125 1993

kiszka94 · L Plate Warrior Joined: 07 Nov 2011 Karma :

hi im new to the forums so bare with me i recently brought a yamaha dtr 125 1993 and ive rode it about a month and it ran like a dream but all of a sudden i started my bike which i had just ridden about a mile or so i revved it while in neautral and it cut out and would not start again i changed the spark plug and it fired up again but the same thing happend. i'm not sure if it keeps flooding but if it is how can i fix it so it dosent keep flooding or can anyone else tell me what it could be. is there any chance it could be a head gasket ? thanks all

FBSF · Nitrous Nuisance Joined: 23 Mar 2011 Karma :

I would start with the carb - get yourself a haynes manual, and give the carb a clean / service. It could well be that a bit of crap has got stuck in the float needle, stopping fuel from getting into the float bowl at the correct rate.

If a damn good carb clean/service doesn't sort it, it's probably time to break out the multimeter and check the electrics.

Unlikely to be the head gasket IMO - unless the coolant level has started dropping rapidly.

Vincent · Banned Joined: 16 Oct 2006 Karma :

Could be a fuel blockage. Is there an in,line fuel filter? What type of fuel tap is it? A "vacuum" type or gravity fed? GF ones should have "On", Off" and "Res" on them, vacuum taps usualy just have "On" and "prime".? A good way to find out would be to remove the float bowl when it's just packed up and see if there is any fuel in there. I'd be a bit careful dismantling the carb if you've never stripped one before.
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FBSF · Nitrous Nuisance Joined: 23 Mar 2011 Karma :

From memory I think it's a GF fuel tap, and it's just a standard round-slide carb - not CV I don't think.

Saying that, if you have a mate who has taken a carb apart, get him round. If not, take it steady (or maybe take the carb to a local bike mech to be cleaned?).