Maintenance & Technical > KX500 Original

Kx 500 standard style graphics

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Friar-Tuck:
Kiwi,
 The thicker head gasket is to lower the compression a tad.  This may be something to consider, http://www.kxriders.com/forums/index.php/topic,3158.0.html
   The carb spacer is avail from Jerry "JFab"  I got one from him, Less than Moose and excellent quality. ( If you have the gumption, you can make one yourself at very little cost.)
 Just like lengthening the intake tract on automotive engines, this will move torque lower in rev range at some top end sacrifice.     
   You also mentioned re-gearing, again, gaining bottem end giving up top end.
 The guys here have worked out some head modifications that improved performance, (squish angle and width). This will help out across the whole rev range w/out any downside, at least to my knowledge.
 Another consideration "if your budget permits" is a PWK 38mm Airstryker carb.  This will give you more of the "snap" in the low and mid throttle,however... sacrificing top end.  The 38mm airstryker also uses the same type needles and jets your present 39.5 pwk uses.

I think several other guys will agree just going through the old girl and bringing her back up to snuff, (Reeds,seals,rings etc.) will give you a good baseline to start with and may surprise you how much the bike has in it stock. 
   Tuck\o/

KXcam22:
CBmoor,
  For MX I liked the reed spacer gnarly pipe combo to widen the power and focus it down lower.  On big bores I prefer to use the mid-range and short-shift them.  Uses the power spread better, less wheelspin and take less effort to race. Stock, my K5 power wasn't to my liking for MX.  Cam.

Uzi9mm:
Will graphics for a KX250 work for the same year KX500?

KXcam22:
No the shrouds are different.  Cam.

cbmoor:
Thanks for all the input guys started stripping the kx tonight one of the radiators is a bit mangled so will sent it away for repair. Going to tear down the top end soon and replace piston and check out the kips is ok. The bike has just been imported from the States so going to check out the carb and see if the jets are the right ones for the north of Scotland  :lol:  Thats where this site is amazing going to follow the carb settings on the fuel section cheers to who ever organized that.

Over the next couple of days going to get the exaust brackets repaired.   Does anyone have any pictures of the top exhaust mount as mine is totally missing would be good to have an idea what was there. On reading some of the other threads on here, some people were mentioning welding square bar which was formed around the frame tube anyone got some pictures on that. The first exhaust bracket also broke off but it was still connected to the exhaust so will be able to get that welded on and get it strenghened.

Has anyone sandblasted and bleedblasted the paint of the subframe and swingarm if so what was the finish like, As the bike is going to be used for MX the less paint the better.

So got a moose spacer ordered from the States, get the jetting checked out and a fresh top end and will see how it goes.

 

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