Maintenance & Technical > KX500 Original

Miles per gallon

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kaw rider:
i know on a sled motor, running 800 rpm higher then peak power you will use double the fuel.

KXcam22:
I would think that on a 2-stroke there will be a "sweet" spot where the pipe and porting start working most effciently together to give best mileage.  I streeted a 2cyl RD350 Yamaha for a few years.  Never got much better than 25 MPG (Canadian gallons).  You could tell the sweet spot by the sound and feel. My fireblade gets 50mpg around town (mostly since it too difficult to ride it hard). It has one huge sweet spot. Cam.

Mick:
I would think for street riding a Gnarly pipe would be the least preferred.  The PC pipe alone could make a noticable difference.  You're turning pretty good rpm to be running at those speeds (+60mph).  A wider ratio trans will curtainly yield better mpg for this application.

For trail riding both my 500s get 30mpg.  That's basically what I consider the max mpg of these bikes to be.  Riden at low rpm and coasting the down hills of the Pacific North West with the engine shut off.  I frequently ride 60 mile single track loops with the OEM two gallon tanks.  My three gallon Clarke tank will feed my CR for 90 miles of a 100 mile off road ride under the same conditions.

What I think is ironic is my RC51, a V-Twin Superbike (2x 500cc cylinders) also gets 30mpg.

Motorrad:
Which tank is that danger?

Danger4u2:
IMS tank.  Yes, on the PC over the Gnarly for the street.  I made this bike into a dual sport off road bike.  I only ride the street on special occasions and between trail heads.


https://www.imsproducts.com/Cart/viewcart.cfm

3.6 gal.  I bought it back in 2004,  if you want one now it's a 4 to 6 week back order.  They must be making them as needed.  $275 now, I think I paid $220.

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