Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)
2006 kx500af Done Building, Needs Tuning
crooscroos:
My kx500af is complete it just needs a little tuning done. I used a 2003 kx500 motor with a 2006 kx250f frame. It vibrates like crazy so I am looking to put rubber washers on all of the engine mounts, along with Flexx handlebars and a steering stabilizer. The motor has a brand new Wiseco piston that has just been broke in. The bike is running a little rough so I may look at jetting options, any opinions out there? Also, I am struggling to keep the temperature down, I routed my radiators according to a diagram I found online but my bike is running around 235 degrees which seems a little high to me. I am losing a little coolant ever now and then as well. Any advice or questions are appreciated and encouraged!
Thanks, Cody
sandblaster:
Hey Cody.
Nice bike.
What is the altitude you ride at now?
What is your current jetting?
Is that water temp or head temp?
What are you doing to reach that temp and what was the air temp?
What coolant are you running?
Did you burp the head and the left radiator?
When you installed the head gasket which side did you put the small holes on?
Post a pic of the rad hose configuration you used.
It looks like the back of your bike is sitting a little low?
Have you checked the sag?
umberto:
I had a lot of luck with Best Dual Sport Bikes handle bar ends. They killed all the vibration on my 2004 KX 250.
http://www.kxriders.com/forums/index.php/topic,14005.0.html
alward25:
sounds like its time for an overhaul to include a crank balance, Highway dirtbikes and Fasst Flex also have brass bar end inserts.
my only real words of advice, watch till the end
https://www.youtube.com/watch?v=qBR0oNp9A7c
crooscroos:
--- Quote from: sandblaster on January 25, 2015, 06:46:54 PM ---Hey Cody.
Nice bike.
What is the altitude you ride at now?
What is your current jetting?
Is that water temp or head temp?
What are you doing to reach that temp and what was the air temp?
What coolant are you running?
Did you burp the head and the left radiator?
When you installed the head gasket which side did you put the small holes on?
Post a pic of the rad hose configuration you used.
It looks like the back of your bike is sitting a little low?
Have you checked the sag?
--- End quote ---
I'm planning on making it a sand bike so I'm riding at close to sea level.Main Jet 165-168
I'm running stock jetting at:
Pilot Jet 52
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
That temp reading came from the heat strip located just bellow the KPS on the cylinder. You can see in the 3rd picture.
I was riding in the sand when I reached that temp but I was not riding aggressively by any means. Air temp was 55 F.
I'm running a 50/50 mix of Napa coolant and water.
How do you burp the left radiator? I simply topped it off after 30 minutes of riding.
It was so long ago when I put the head gasket on, I don't remember where the little holes were. I thought it only fit correctly one way when I put it on.
I copied Benny Lindberg's radiator hose setup but I can't seem to find his write up at the moment.
I thought the back was sitting a little low as well. I haven't checked the sag but I plan to in the near future!
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