1991 KDX 250 Power valves do not always open
Posted: 11:46 am May 27 2018
I need some advice/help here.
This is now after the bike has been warmed upt thoroughly.
When I do accelerate it seems that the power valves do not always open up. The bike will make a dull noise and do not have high rev/speed power.
It is fine from idle to about half power. I can also hear that the power valves do not open. When they do open the bike has a lot more power and the exhaust note has a much higher pitch.
This happens about 50 % of the time. The power valves will then sometimes just open up suddenly but mot always. Then at the next run it seems fine again.
I then took off the exhaust/expansion pipe and also the plastic cover/boot at the linkage to the governer rod. I also took of the collar on the rod. While looking through the exhaust port, I the pulled this rod back and forth to make sure if it is loose or stuck. Everything seems fine and I can see that the side valves and the exhaust valve are opening and closing. Could it be that there is something wrong with the covernor lever/linkage to the governor rod?
Or what must I look for?
This is now after the bike has been warmed upt thoroughly.
When I do accelerate it seems that the power valves do not always open up. The bike will make a dull noise and do not have high rev/speed power.
It is fine from idle to about half power. I can also hear that the power valves do not open. When they do open the bike has a lot more power and the exhaust note has a much higher pitch.
This happens about 50 % of the time. The power valves will then sometimes just open up suddenly but mot always. Then at the next run it seems fine again.
I then took off the exhaust/expansion pipe and also the plastic cover/boot at the linkage to the governer rod. I also took of the collar on the rod. While looking through the exhaust port, I the pulled this rod back and forth to make sure if it is loose or stuck. Everything seems fine and I can see that the side valves and the exhaust valve are opening and closing. Could it be that there is something wrong with the covernor lever/linkage to the governor rod?
Or what must I look for?