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wheelup

Which rad. cap part number for 650R?

9 posts in this topic

Somebody has to know which radiator cap to use from PepBoys, like a Stant to get 1.6 and not have to get one from the "Pros" for $34 + shipping. Any help? I already searched and I found a lot of stuff on just getting a 1.6.

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I called a local Kawi dealer and he told me the kawi rad cap that fits (I think an old KX model (500?) , but don't quote me on that) listed at $72.00 Cdn :lol: . The stant racing one is cheaper than anything else I've found up here.

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Please explain to me what I am missing on this subject. You want to exceed the manufactures specs on your cooling system's pressure? First, if your trying to avoid overheating, why make it harder for the system to overheat, thus making the engine temp higher? Sounds like that would not be good for the motor? :lol::confused: :confused:

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Did you ever read up on the overheating of these unless a LOT of full throttle happens? Which doesn't happen on street bikes!!!:lol:

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Please explain to me what I am missing on this subject. You want to exceed the manufactures specs on your cooling system's pressure? First, if your trying to avoid overheating, why make it harder for the system to overheat, thus making the engine temp higher? Sounds like that would not be good for the motor? :lol::confused: :confused:

I don't have a good tech answer for you other than going to a 1.8 cap on the XR650R almost emiminates the overheating problem they experience when run at slow speeds. If you're always moving and don't ride hard you won't have a problem.

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this is what little i can tell you about the rad cap stock is a 1.1,raising the cap pressure gets the bike running hotter so it doesn't boil over as soon. A cap from a KX500 is a 1.6 Kaw part #49085-1059. Also change the thermostat I bought the one from Summers racing. And was told to add "water wetter". These are things I did to mine when I had one. It is gone now and I have an L it seems to fit my needs a little better. In some ways

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I don't have a good tech answer for you other than going to a 1.8 cap on the XR650R almost emiminates the overheating problem they experience when run at slow speeds. If you're always moving and don't ride hard you won't have a problem.

Uncork the bike, jet it properly, and the overheating issue seems to go away unless you sit at idle for a long period of time. I am not sure, but run in stop and go traffic and I bet i:ride: t will heat up. But, what is the bike made for? Running, and Running... full speed ahead... if it heats up during this time, something is wrong with the system. If you want to convert it to a "street bike", I applaud you of your choice of bike, but I suggest running this bike on the street when you can really run!!!:lol::confused:

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