2006 klx250h
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Junior Member
Joined: Aug 2024
Posts: 1
2006 klx250h
Hi guys,
So I'm having some issues with my 2006 KLX250H Trail Bike.
Bike has sat for almost 12 months after my old man took it out for a muddy weekend.
Since getting the bike back its had a full service, carby cleaned right out, fuel dumped and fresh fuel put in.
I can't get this bike to idle without full choke and I'm at a loss as to where to look at next.
Dad said it ran without issue when he took it out and had no mechanical issues before or during his weekend out on it.
Any Ideas?
Cheers
So I'm having some issues with my 2006 KLX250H Trail Bike.
Bike has sat for almost 12 months after my old man took it out for a muddy weekend.
Since getting the bike back its had a full service, carby cleaned right out, fuel dumped and fresh fuel put in.
I can't get this bike to idle without full choke and I'm at a loss as to where to look at next.
Dad said it ran without issue when he took it out and had no mechanical issues before or during his weekend out on it.
Any Ideas?
Cheers
Senior Member
Joined: Jun 2013
Posts: 3,315
From: North Texas
1st Gear Member
Cleaning the pilot system ( the pilot jet and all pilot system passageways ) is not an easy task.
But it is a task that you will do over and over, until you get it done right. Yanking off and dismantling the carb is required and I would wish for all members to "get it right" the FIRST time.. SO....
Pilot Jet : With carb off, remove the pilot jet. Use a bristle off a wire brush to clear obstructions, shoot it with a cleaner, blow it out, check for remaining obstructions, repeat until every single hole ( especially the hole in the end of it) is clear. IT IS NOT UNCOMMON to have a pilot jet that just needs to be replaced due to it being totally "varnished up" internally. I have spent hours cleaning "varnished up" pilot jets - mainly due to having to use tiny drills to remove the varnish plug that runs the length of the pilot jet internally.
Pilot system passages : Remove the idle mixture screw. The pilot system has air/fuel passages in the floor of the carb barrel. These are passages in front of, and behind the butterfly. ALL of them ( as well as the passage to the idle mixture screw) must be clear and verified functional. You do this by spraying cleaner into the pilot jets' mounting boss and observe fluid passing into the carb barrell THRU EACH PORT of the system. Hint: Once the idle mixture screw passage is verified clean and clear, you can replace the screw in order to continue cleaning the other passageways.
Again, you will suffer horribly until you do this right. The system not only controls idle, it provides the initial "shot of fuel" whenever you crack open the throttle - these are called the transfer ports and they are the ones aft of the butterfly. Think of them as the "anti-bog" passageways.
But it is a task that you will do over and over, until you get it done right. Yanking off and dismantling the carb is required and I would wish for all members to "get it right" the FIRST time.. SO....
Pilot Jet : With carb off, remove the pilot jet. Use a bristle off a wire brush to clear obstructions, shoot it with a cleaner, blow it out, check for remaining obstructions, repeat until every single hole ( especially the hole in the end of it) is clear. IT IS NOT UNCOMMON to have a pilot jet that just needs to be replaced due to it being totally "varnished up" internally. I have spent hours cleaning "varnished up" pilot jets - mainly due to having to use tiny drills to remove the varnish plug that runs the length of the pilot jet internally.
Pilot system passages : Remove the idle mixture screw. The pilot system has air/fuel passages in the floor of the carb barrel. These are passages in front of, and behind the butterfly. ALL of them ( as well as the passage to the idle mixture screw) must be clear and verified functional. You do this by spraying cleaner into the pilot jets' mounting boss and observe fluid passing into the carb barrell THRU EACH PORT of the system. Hint: Once the idle mixture screw passage is verified clean and clear, you can replace the screw in order to continue cleaning the other passageways.
Again, you will suffer horribly until you do this right. The system not only controls idle, it provides the initial "shot of fuel" whenever you crack open the throttle - these are called the transfer ports and they are the ones aft of the butterfly. Think of them as the "anti-bog" passageways.
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