KX Riders

Maintenance & Technical => KX450F / KX250F => Topic started by: Jscrambles on August 10, 2015, 01:52:12 PM

Title: 09 KX450 troubles
Post by: Jscrambles on August 10, 2015, 01:52:12 PM

I just purchased a worn out 450 about a month ago. The bike started cutting out when it  got hot as I would hit the gas. It would idle fine. Had the top and bottom rebuilt by reputable company. Motor was shredded. Put motor back in bike and broke it in according to recommendations. Ran fine. Took bike to the mountains to ride and after about a hour the bike started doing the same thing,ie(cutting out on acceleration, backfiring, stalling,etc...)   Still idles along fine. I'm at a loss.. Any suggestions would be greatly appreciated

Title: Re: 09 KX450 troubles
Post by: sandblaster on August 10, 2015, 02:22:38 PM

I would run the OHM specs on the stator and see where it is at.
If it tests ok then I would run the bike till it gets hot and starts to give you problems.
Then, before it cools off I would run the ohm specs again.

Title: Re: 09 KX450 troubles
Post by: Jscrambles on August 11, 2015, 06:57:33 AM

Thanks for the reply. Sounds like a good place to start. I will try that as soon as I get time and let you know what works out.

Title: Re: 09 KX450 troubles
Post by: alward25 on August 11, 2015, 08:16:09 AM

Unplug the grey stator plug behind lh radiator, blow out with air and apply dielectric grease, normal problem.  Start with that

Title: Re: 09 KX450 troubles
Post by: sandblaster on August 11, 2015, 12:48:10 PM

That's cheap and easy.
Hope it solves your problem.

Title: Re: 09 KX450 troubles
Post by: Jscrambles on August 11, 2015, 01:00:55 PM

That's definitely cheap and easy. I hope so to, will give it a try and see what happens. Thanks for the info

Title: Re: 09 KX450 troubles
Post by: Motorrad on August 11, 2015, 02:57:56 PM

If that doesn't do it... It could be all those extra parts in your motor... Parasitic parts.....

Sorry.  Someone had to go there

Title: Re: 09 KX450 troubles
Post by: Jscrambles on August 16, 2015, 02:01:16 PM

Well tried unplugging stator plug and blowing it out and applying dielectric grease. Took a little longer to start bogging but it did about an hour into ride. Back to trying something else ie stator or temp sensor.