Hey guys i have a ke 125 im having problems with. It will start and run but when u put it in gear and try to take off it will die on you what could it be?
The plug when you take it out after you let the jug get hot looks light to medium brown. good or bad. Also do any of you know what a good compression reading would be? Thanks for the help

 

Does it shut off when put in gear? If so check the side stand switch if it has one. My KLX had a sticky side stand switch. I took it off.

 

even with the rpms reallly high?

 

Generally it is the slow circuit in the carb or a cracked boot. What year do you have?

welcome to KF

 

its a 1981 model. i replaced the rubber boot for the carb. i did ride it down the street and after a couple of runs it will idle but when givin thrttle it wants to die.

 

also its a rotory valve engine. in case you didnt know.

 

will it run with the choke on?

 

no it will fire up and idle up for a few seconds and then it will die. then its hard to get started back.

 

Hey dj, just hoping I can catch your eye sent you an email.

For some reason Share It would not take my aol email for delivery and I used a secondary one but I must have messed it up as nothing has come. Can you check your 'support' email, I sent the particulars there.

Then you can delete this topic, thanks ;- just trying to increase my odds at catching you over the weekend
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Sounds like it is lacking in fuel, maybe float height, maybe the fuel filter clogged (it's inside the tank), fuel line clogged?

Either that or lack of spark. Could be enough spark to get it going but not enough when the load comes on.

Compression should be approx 160 - 180 lbs/sq inch

Is the rotary disk valve ok?