KDXRIDER.NET

Hi all, I have just recently acquired a 1991 KDX200, and have just got it running. It sounds good and shifts smooth, but when I start it up, the water in the radiators goes straight to the over flow tank, and out the overflow tank onto the ground. When its running the overflow tank looks like a jetted tub it is super pressurized, I thinks its the head gasket, but I want to hear some other thoughts on that. Also am wondering what the stock bore and stroke is.

Yep, the system is being pressurized.

Did you replace the head gasket (or have it apart)?

66 x 58

I concur, probably head gasket.

thanks, and no I have not taken the cylinder or head off, yet. Do you know what the sock hp, torque, and top speed is ?

stock HP is around 27 or so, top speed around 70 mph with stock gearing

for the 91 ?

89 - 94

ok, another question, my 91 has been sitting for 15 years and the clutch is not disengaging when you pull the clutch lever. I think maybe the clutch pads are stuck but I'm not sure. What do you think

Have you changed the oil?

Setting for 15 years is not the best thing for them.

yes,I changed the oil

Did you try to put it in gear when it was running?

They can be a bit stubborn sometimes but generally you can break it loose by putting it into gear with the clutch lever pulled. At idle if the bike dies when you shift into gear try a bit of throttle and shift up from neutral into 2nd gear.

That's exactly what happened, I put it into gear while it was running (clutched lever pulled) and it died, ill try giving it a little throttle next time to brake it loose, Thanks

bump start it in gear

Well I actually forgot that while filling the engine with tranny fluid I ran out so I filled the rest of the tranny with motor oil. So most of the tranny was filled with motor oil. So that's probably why the clutch was a little sticky, lmao. I forgot I did this so I recached out to you guys when the problem was my own stupidity lol

as long as you got it going!