Got some ?????S about a 99 kx 250

[ratherbefishin]

Well i got myself a 99 kx 250 the other day for cheap and it smokes real bad to the point it spits oil out the exuast....

I am goin to start with some general service like cleaning carb, check jet size, new pug and clean the filter. I was just wondering if its possible if trans fluid would be entering the crank area causing this issue, or maybe its time for a new top end?? any thought and advice would be great. THANKS!!!!!!!

[Dave S]

You more than likely need a top end rebuild i.e. piston and rings. The reed/reed cage might also be bad with the bike being 11 years old.

[ratherbefishin]

sounds good .....i did find a broken reed pedal this morning ( big chunk missing) this will only cause a running issue right not a smoking condition?

[Macgyver55]

No, a broken reed can also cause internal damage if the piece gets sucked into the crankcase. Aside from that, a broken reed will allow part of the fuel charge to be blown back out of the carburetor and then reenter as what should be fresh air, in effect causing an over-rich mixture.

Replace the reeds, make sure you have the correct mixture of oil/fuel, clean or replace the air filter, and give it another try.

[ratherbefishin]

Thanks for the info, i hope to get the parts by next week some time and cross my fingers she reduces the smoke to normal. I cant wait to take it for another rip. I used to have a 98 kx 250 back in 99.

[ratherbefishin]

well got it together, now its really boggy (falls on its face) when you give it lots of gas, like you would out of the hole, i didnt really notice this before but i did take it around my house once so........i still need to put a new correct plug BR8EVX has a BRPES in to see if that helps.

I checked the plug seemed wet soaked, I did do a comp test ( WARM ) it said around 175 after 4 kicks

Anymore input would be great