Maintenance & Technical > KX500 Original

A cooling system experiment

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maddoggy:
martinfan, what rated cap are you using? 1.1 bar or the 1.6? did you capture the lost coolant in the overflow tank you made? i guess i'm wondering if it's coming out the overflow or exiting somewhere in the engine.
                                                                                           MADDOGGY

martinfan30:

--- Quote from: maddoggy on June 07, 2009, 08:48:52 AM ---martinfan, what rated cap are you using? 1.1 bar or the 1.6? did you capture the lost coolant in the overflow tank you made? i guess i'm wondering if it's coming out the overflow or exiting somewhere in the engine.
                                                                                           MADDOGGY


--- End quote ---

Its a 1.1 cap. The coolant does collect in the bottle and does not enter the engine. I was hoping it would recycle the coolant in the reservoir, but im at a loss.

maddoggy:
sounds like all the coolant loss is exiting via the overflow. if i had to guess i would say the cap is the problem. my bike used to blow coolant out the overflow when i rode in the dunes under high h.p. demand + high heat. i put a 1.6 bar cap on and solved the problem. your cap may have lost some spring and therefore will not hold to its rated psi anymore, or maybe the engine is getting a little warmer than the stock cap can take. i would advise you to get a 1.6bar rated cap and then your covered either way. just some fyi             ( 1.1 bar=15.95 psi) ( 1.6 bar= 23.20 psi)                 MADDOGGY

martinfan30:

--- Quote from: maddoggy on June 08, 2009, 01:17:49 PM ---sounds like all the coolant loss is exiting via the overflow. if i had to guess i would say the cap is the problem. my bike used to blow coolant out the overflow when i rode in the dunes under high h.p. demand + high heat. i put a 1.6 bar cap on and solved the problem. your cap may have lost some spring and therefore will not hold to its rated psi anymore, or maybe the engine is getting a little warmer than the stock cap can take. i would advise you to get a 1.6bar rated cap and then your covered either way. just some fyi             ( 1.1 bar=15.95 psi) ( 1.6 bar= 23.20 psi)                 MADDOGGY

--- End quote ---

Where can I get a 1.6 cap? Is there a Kawi part number?

KXcam22:
Martinfan,
  On my red 450 I used the X model recovery tank which is custom molded to sit between the frame tube beneath the engine, expensive but very cool.  What I noticed that being very low (like yours) it took a number of rides before it would recover.  Essentially, the hose has to be completely full so it can siphon back and forth.   My other tanks were mounted at the rad level and worked right away. Also, if you have a leak in the hose where it connects to the rad, air enters and breaks the siphon.  My cap is a 1.1. Hope this helps. Cam.

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