I had my 04 kx250f rebuilt (my dad picked it up for me due to my job and didnt try to start it) when I got home I tried to start the bike it will rarely start and only will run for seconds if that.. It sounds very bogged down for the brief seconds that it does start I havent got a clue on what the problem is I just picked up a manual for it and would greatley appreciate any help I can get thanks.
Problems...
Started by
Blaker454
, Mar 08 2012 05:42 PM
51 replies to this topic
Posted 08 March 2012 - 06:14 PM
Maybe a good carb cleaning and check your jets?? Good starting point perhaps.
Posted 09 March 2012 - 06:20 AM
It had a cracked right case replaced and then totally rebuilt, the bike ran before that... I will prob check the carb and jets also the spark tonight hopefully
Posted 09 March 2012 - 09:22 AM
Check your timming to see if it's spot on. I had one of my bikes motors get worked on a while back and sounded like what your problem is and it was out of timming by one tooth. Would start but would bog and pop and cut out. Just make sure all your timming marks are lined up befor your jump into the carb.
Posted 09 March 2012 - 09:46 AM
Yeah double check the timing.
And when older bikes sit for some time when being rebuilt the carbs usually gum up with varnish. Clean it out.
And when older bikes sit for some time when being rebuilt the carbs usually gum up with varnish. Clean it out.
Posted 09 March 2012 - 12:55 PM
Thanks guys I will check some of that tonight it sounds like the timing
Posted 09 March 2012 - 05:29 PM
If you paid someone to do the work take it back and ask them what is the problem. If you start trouble shooting and kind ID the problem once you do take back they can say this is a new issue and you created it. Besides if you paid for a bike that should run why waste your time tinkering with it.,
Posted 09 March 2012 - 06:30 PM
dmay4, on 09 March 2012 - 05:29 PM, said:
If you paid someone to do the work take it back and ask them what is the problem. If you start trouble shooting and kind ID the problem once you do take back they can say this is a new issue and you created it. Besides if you paid for a bike that should run why waste your time tinkering with it.,
Sometimes its better to just bite the bullet than take it back to someone who was supposed to fix it right the first time and trust them to "fix" it again. Not only that whose to say they dont just say it was a new/different problem and charge you again anyway. Timming, valve clearance, carb, spark. Start with the basics and go from there.
Posted 09 March 2012 - 08:16 PM
I like to tinker and fix myself if I can but if I had paid for a job to be done would like to get the job I had paid for. But that is right they may find another whole problem, that is why I think its good to find a trustworthy local place then hopefully this never happens.
Posted 10 March 2012 - 10:28 AM
I don't think I'll take it back to him I am just gonna try to figure this out on my own right now I'm checking the timing, valves, spark, and carb I have the maintenance manual for the bike I want to be able to do this stuff on my own instead of spending extra $ for a shop to do it I never should have sold my old bikes
Posted 10 March 2012 - 02:34 PM
Bike was severely out of time... camshafts are different than what the manual shows them being don't know if that's a problem also when I go to put the timing chain on the bike does it have to stay at tdc till I put the tensioner back in?? I'm new to this and also the manual is not very informing of this... I hopefully will have everything done tomorrow if this is the problem
Posted 12 March 2012 - 08:47 AM
Make sure the bike is TDC when you put the ex cam in first, and make sure you have slight tension on the chain from the crank to the ex cam when you slip it under the chain while tipping the cam forward toward the gear end. Once you have the ex side in correctly, count pins per the manual to line up the in side. When you think you have them both in right, slip your pinky finger slowly into the chain tensioner hole and press lightly against the chain. Line up TDC one more time, check the dots, hopefully good to go.
Posted 14 March 2012 - 06:06 PM
Timing is fixed bought a new CDI Pro Circuit JD Ignitions new spark plug cleaned the carb out and I honestly have never seen a carb as gummed up like that... Bike starts but the second kickstart goes back up the bike dies... I am going to pull the right side off and see if something is wrong in there but that's where I stand as of now guys... Headache...
Posted 15 March 2012 - 01:01 PM
If the Carb was so gummed up i would get new jets ..atleast a pilot jet
Also have you checked your valves ?
Also have you checked your valves ?
Posted 16 March 2012 - 01:46 AM
Blaker454, on 14 March 2012 - 06:06 PM, said:
Timing is fixed bought a new CDI Pro Circuit JD Ignitions new spark plug cleaned the carb out and I honestly have never seen a carb as gummed up like that... Bike starts but the second kickstart goes back up the bike dies... I am going to pull the right side off and see if something is wrong in there but that's where I stand as of now guys... Headache...
I'm not really understanding this. Are you saying the kickstarter isn't disengaging?
Posted 24 March 2012 - 07:05 PM
Finally found time for the bike... pulled the right side off and found that the kickstart shaft has alot of freeplay and that I had 2 teeth of a sprocket.... tearing more into it later
