Maintenance & Technical > KX500 Original
jetting for 6200-10k above sea level.
bjohn07:
found the comp test psi. 105-164. ill be doing that today. also the 2 o rings on the fmf pipe are shot. little oil was coming out so im sure that had an effect on the way it was running. to bad the local bike shop is closed till tuesday.
Foxx4Beaver:
See what you get for a compression reading....if it's under 125psi,if it were me,then I'd just yank the motor out of the cradle and pull the jug,send it out to be re-plated,with a fresh piston/rings....and while you're at it,you can check for play in your crank bearings.I'm not saying this is what you have to do...but if it were me,with it being winter,now's the time to freshen things up for the start of the new season :-D
If it still reads well above 125psi...which is what you're hoping for,then I'd be pullin off the carb and cleaning the snot out of that,get a handful of different jet sizes,and take small steps.
Keep in mind too,with it being winter...you are gonna want to be a bit rich....and yes,get the OEM exhaust o-rings,they last longer than the FMF's...and don't be afraid to use a little red RTV to help seal it tight :wink:
Foxx4Beaver:
I really can't give you a good starting point for your jetting....as I run in 500-1000ft elevation at the most.I'm sure someone will chime in that can better guide you for your kind of elevation.
Also,what are you running for a pre-mix ratio and what brand of oil are you using?
bjohn07:
--- Quote from: Foxx4Beaver on January 27, 2013, 02:42:14 AM ---I really can't give you a good starting point for your jetting....as I run in 500-1000ft elevation at the most.I'm sure someone will chime in that can better guide you for your kind of elevation.
Also,what are you running for a pre-mix ratio and what brand of oil are you using?
--- End quote ---
well not really sure. guy i got it from didnt ride much so im more than positive this is old gas. not sure what mix. but if the compression is good im gonna go grab fresh 91oct. and mix 32:1 with benol. buddy told me its good stuff and it adds a distinct smell to the exhaust which will help to let me know if im running to rich. i wont test it out again till tuesday once i have the exhaust orings. so i already pulled the carb last night. im gonna run a cold compression test just to get a base. what should the psi reading be.
Foxx4Beaver:
--- Quote from: bjohn07 on January 27, 2013, 03:01:12 AM ---what should the psi reading be.
--- End quote ---
You already know that answer from one of your previous posts :wink:
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