Ed

Hi guys. Got a DT 125 MX for a project. The previous owner bored it, not sure how far oversize he went though. he also fit a ktm racing muffler and cone filter. It's suffered 33 years of abuse, so I plan to do a full engine rebuild. Parts aren't difficult to find, neither was the Haynes manual... but a parts catalogue is, I can only find the one for the liquid cooled model.. Does anyone know where I can find one? I'd like to be able to search for parts by their number to avoid compatibility issues. Does anyone have/ know where I can get a parts catalogue? Also, it's moody when it comes to starting, I think its running rich on both jets, for these reasons: 1) i can turn the idle air screw in all the way with no stumbling, but it starts idling real bad if i turn it out more than 2 turns. 2) at wide open throttle, It sometimes dies, more on hot days and in low gears… 3) when cold it normally starts without choke (when it feels like it), but if I turn it off when hot it nigh on impossible to start. Also when it doesn't start and I pull the plug, its normally wet. Probably rich, yes?Just want to make extra sure since its air cooled and I wouldn't want to seize it with a jet too small.

Hi guys. Got a DT 125 MX for a project. The previous owner bored it, not sure how far oversize he went though. he also fit a ktm racing muffler and cone filter. It's suffered 33 years of abuse, so I plan to do a full engine rebuild. Parts aren't difficult to find, neither was the Haynes manual... but a parts catalogue is, I can only find the one for the liquid cooled model.. Does anyone know where I can find one? I'd like to be able to search for parts by their number to avoid compatibility issues. Does anyone have/ know where I can get a parts catalogue? Also, it's moody when it comes to starting, I think its running rich on both jets, for these reasons: 1) i can turn the idle air screw in all the way with no stumbling, but it starts idling real bad if i turn it out more than 2 turns. 2) at wide open throttle, It sometimes dies, more on hot days and in low gears… 3) when cold it normally starts without choke (when it feels like it), but if I turn it off when hot it nigh on impossible to start. Also when it doesn't start and I pull the plug, its normally wet. Probably rich, yes?Just want to make extra sure since its air cooled and I wouldn't want to seize it with a jet too small.

Hi guys, Got my first Yamaha a few months back, a 1982 DT 125 MX. Its going to be a project, right now its a bit of a moody bike when it comes to starting up. Super good fun to ride though. Looking forward to working on it, could use all the knowledge I can get from you guys Thanks in advance, Ed.