Maintenance & Technical > KX500 Original
Project "I was only gonna clean the air filter!"
USMC 500:
Oh by the way......for those of you who have never had the chance to hear this bike or see it in action.......here you go.....
http://www.youtube.com/watch?v=sG6Bq2VN9qQ
http://www.youtube.com/watch?v=S2h3gd8wQEY
USMC 500:
My high $$$ Pingle petcock showed up today. Here are some pictures showing the various measurements of the Pingle and a few side by side shots of the Pingle and the stocker....
This is what you get for $95......petcock and gasket
Height of the petcock from bottom to its mounting surface
Length of the valvebody and fitting
Width of the valve body
Size of the outlet fitting
Size of the inlet screen
Here is the inlet with the screen removed
Inlet screen size, stocker vs Pingle
O-ring compared to rubber gasket, stocker vs Pingle
Outlet size, stocker vs Pingle (no contest)
The instructions say that you must carefully expand the opening on the tank for the larger petcock screen
Here she is mounted :-D
Now keep in mind........I performed a flow test with both the stocker and the Pingle and there was no contest, the Pingle will empty the tank quick.......however even though the Pingle will outflow the stock petcock, you are still limited by factors such as inline fuel filters and the inlet on the carburetor. But this thing will not be the weak link when it comes to flow and it adds some major "bling" factor!!
sandblaster:
Thanks for posting the info.
I really appreciate it..
motopunk:
--- Quote from: USMC 500 on March 30, 2013, 07:40:51 AM ---I have installed a 15 tooth countershaft sprocket and I have to say that I am in love.....the tall 15/45 gearing has made this bike what it is supposed to be.....rear tire no longer explodes with wheel spin...it now hooks and drives. The "Flying M" motor has all the grunt in the world to pull this gearing through some technical secitons as well. You can read the ride report by going here....
http://www.kxriders.com/forums/index.php/topic,11397.0.html
--- End quote ---
the ratio for the secondary drive, you can easily calculate. you just divide the number of teeth on the big sprocket by the number of teeth on the countersprocket.
KX500 stock 47/14 = 3.357
yours 45/15 = 3.0
i normally use for mx track 50/15 = 3.333
some supermoto guys use 45/16 = 2.813 or 47/16 = 2.9375
the smaller the calculated number, the faster the motorcycle and more control on the rear wheel traction on firm ground.
the larger the calculated number, which is slower motorcycle. gives more power to the rear wheel. you can shift into a higher gear earlier. which is then good for sand or mud tracks.
Change of countersprocket a tooth is about the same as changing the sprocket on the rear wheel of 4-5 teeth.
turdle:
after seeing the picture of your tank, you wouldnt have to trim anything ,to fit the yamaha petcock ,being as its flat. the stock kx tanks are recessed, hence the need for a trim.
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