1 post in this topic
I have a 2006 yz250. It was fully rebuilt top to bottom last winter before racing started
rode all year and it was fine
the problem I am having after winter start up is
starts no problem, run decent, when I turn the throttle smoke and. Lack oil spray out of the silencer like if I put a glove on there's a nice layer of oil
also the part of the carb that comes out of the tps and sits on the throttle slide. To me seems loose as in I can lift it to a point and it doesn't spring back. Is it suppose to stay tight to the top of the slide
it feels like it doesn't any force down till about 3/4 throttle when I hold it up with my finger
also when I lean my bike over the idle picks up a lot
2009 Husky WR 300.
New top and bottom end.
New brake pads and they were just bled.
Hyde skid plate.
FMF Gnarly pipe and FMF Q-Stealth silencer.
JD Jet kit.
Comes with extra cylinder, head and piston.
Comes with lighter springs for the suspension.
Pulls like a mule.
This is an awesome trail bike. If you ride Georgetown, Foresthill, Elkins Flat or Chalk Bluff this bike will not let you down.
By Steve Sutton
Apologies for the long post, but I’m including as much info as possible.
I have a 2-Stroke Yamaha TDR250 1KT, same motor as the TZR250 apparently.
I just completed a top-end rebuild. I only replaced the left piston as the right one look good. Probably should have replaced both, but anyway…
My problem is the right cylinder/exhaust gets very hot very quickly and smokes a lot. The exhaust is hot only after 30 seconds of idling. The left remains room temperature and does not smoke.
I don’t want to ride it too much in case it causes irreparable damage. But when I did try to ride her, I can only get a few hundred meters before she cuts out. I have to start again and can not get into 2nd gear before it stalls again. I’d have to limp home at a bicycle’s pace as anything above idle revs kills the engine.
Not sure if the poor running is related to the hot exhaust, or another problem entirely.
I’ve done the following troubleshooting:
- swapped around plugs – no difference
- swapped around plug leads – no difference
- swapped around Carburetors (but not the Jet Needles) – This then made the left cylinder smoke and the right smoked a little, but not as much as previously. The carbs are back on their original sides as they are specifically left and right.
- sprayed carb cleaner onto the carb boots to test for air leaks and that had no effect.
- Raised the Jet Needle in the right carb for a richer mixture – It appears to smoke less (could be my imagination), but it still gets hot quickly.
- Checked the plugs again and the troublesome cylinder’s plug looks to be running very rich (all dirty), so I lowered the needle this time for a leaner mixture. Still no difference.
I removed the exhaust and wiped my finger in the cylinder’s exhaust port. Looks like black paint!
Has anyone ever experienced this and what was the solution?
Hello everyone I am 16 years old and I was a quad rider ever since I was young. I had a ltr 450 that I sold recently. I'm about 5'5"-5'6" tall and weigh about 115 lbs. I rode my friends rm 125 just this past weekend and I enjoyed riding the bike! I'm looking into buying a 125 but I still cant decide weather to buy a yz 125 or a ktm 125 sx. Again I'm a newer rider to dirt bikes but I still know how to ride one and I'm also new to 2 strokes but I've been doing a lot of research lately and learned a lot about them and all the maintenance with them. I will be using the bike for pretty much all trail riding. I just want a reliable bike that I can take care of that will give me no problems. Any Opinions/Preferences? Thankyou Everyone!