2000 XR100 smokes worse than a 2-stroke

[kdxtodd]

I just picked up this 2000 xr100 that is pretty beat up. It smokes a lot to where its spooging like a 2-stroke. Im not sure where to start. I wanna believe its maybe worn out rings and be an easy fix, or it may be leaking oil through the valves.

Arnt these things indestrucible? would the valves be bad on this type of bike? I guess anything is possible since the bike was thrashed.

any help appreciated
thanks

 

[cr125freak]

I always thought they were unbreakable, we sunk mine seat deep in mud, and never had it stuck

 

[Crzyfrlss1]

You already aswered your own assumptions.

Time for a top end rebuild (piston and rings, etc)
And/or valve seals.

Fix it now before you blow it to pieces :laugh:

 

[2 strokes for life]

Stop putting in pre-mix :laugh:
Nope it is time for the rebuild :nod:

 

[snb73]

Is the air filter dry and dirty, probably. Sand and dirt will ruin any rings, even in an indestructable XR. Take the top end apart and replace the rings, piston too if it is out of specs. If that doesn't solve the problem, rebuild the head.

Good luck, Steve.

 

[Matt 193]

Just incase give your silencer a repacking job. I did it to my bike and it smokes less and runs quieter then with my 2 year old packing.:)

 

[kdxtodd]

Thanks for your help guys. I got a new top end coming so i'll throw that in and see what happens. oh and forgot one more thing. The choke slide vibrates a lot and wont fully open. I have to manually flip the lever to get it run right, well put the choke on so the slide is all the way open. I dont know why its doing this. and yesterday it just stopped. I pulled the plug off and cleaned the gunk off and put it back in and it started a litttle but quit. maybe the plugs fouled or its not getting fuel.