Need help with dirt bike

[FireInTheWire]

I bought my boy a ttr-50 for his birthday. Got it home and cleaned up the carb. It fired right up... but i'm getting a lot of blue/white smoke out the pipe. I've had to clean the plug twice and it's real wet with black when I do. What do ya'll think is causing this issue... My pop in law said the carb probably needs tuned. I might need to get the manual and get the air/fuel screw set in correct location. Would this cause all the smoke? Or my rings shot?

Thanks for any info

 

[TheDan]

Blue smoke is usually rings, black or grey smoke is running too rich. You could possibly have both bad rings and running too rich... Can you tell if the wetness on your plug is fuel or oil?

 

[FireInTheWire]

Blue smoke is usually rings, black or grey smoke is running too rich. You could possibly have both bad rings and running too rich... Can you tell if the wetness on your plug is fuel or oil?

I would say oil. I was afraid of it being the rings. Wonder if I can pressure test the cylinder like a car?

 

[avvidclif]

I don't remember if the TTR is a 2 stroke or not. If it is smoke is normal but fouling plugs is an indication of wrong fuel mixture.

 

[deemus]

I would say oil. I was afraid of it being the rings. Wonder if I can pressure test the cylinder like a car?

Sounds like you don't need to pressure test it. Maybe you have a friend who can rebuild that upper?

 

[FireInTheWire]

It's a 4 banger

 

[deemus]

I don't remember if the TTR is a 2 stroke or not. If it is smoke is normal but fouling plugs is an indication of wrong fuel mixture.

Its a 4 stroke

 

[avvidclif]

Ok, disregard. Bad rings......

 

[ZX9RCAM]

Cool dad!
Hope you get it worked out.

 

[FireInTheWire]

Thanks for sharing ya'lls knowledge. Much appreciated!

 

[grasshopperglock]

http://www.fast50s.com/i-18695575-t...kit-54mm-z50-xr50-crf50-xr70-crf70-ttr50.html


Good thing is the wrist pin is free floating. It doesn't have to be pressed out. The piston can be switched out without having to take the connecting rod out the motor. Pull the head and cylinder. Replace the piston and rings, hone the cylinder bore. Stick it back together. Researching the bike, smoking is a common problem.

 

[FireInTheWire]

http://www.fast50s.com/i-18695575-t...kit-54mm-z50-xr50-crf50-xr70-crf70-ttr50.html


Good thing is the wrist pin is free floating. It doesn't have to be pressed out. The piston on can be switched out without having to take the connecting rod out the motor. Pull the head and cylinder. Replace the piston and rings, home the cylinder bore. Stick it back together. Researching the bike, smoking is a common problem.

Thanks for the link and i'll go read some threads.

 

[deemus]

Thanks for the link and i'll go read some threads.

I have a buddy that does this often.

 

[TheDan]

Wonder if I can pressure test the cylinder like a car?

Yep, same principals. Good news is bikes are generally easier to work on.