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Motorcycle Repair/watercooling for CG250cc atv


Ive got a 250cc watercooled atv, my waterpump packed up, i can get a new one, but was thinking to convert to electric waterpump? What must i do, or can i just put a electric pump?

Deon, I don't know anything about your vehicle, but adding an electric waterpump is probably not the best idea for engine longevity, unless you are going to blank off the engine case where the old pump was. You would want the impeller to be out of the fluid flow of an outside pump. If it isn't turning and doing its job to move coolant through the motor, then it becomes a flow restriction that might cause cavitation when an external pump is being used. Assuming the original pump is driven off of a shaft or gear, you would have to cap off that end of the pump housing, as well, removing or modifying the drive system. I suggest that you stay with the OEM parts for a quick and easy repair. Either replace the pump assembly or install a repair kit that fits your model.

Bill Silver

Motorcycle Repair

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Bill Silver


Need help with vintage Hondas from the 1960s? I am an expert with 250-305cc bikes in particular and most all of the other pre-91 models, in general. I do NOT claim to have a great deal of experience on Gold Wings, Cruisers, ATC/ATVs and dirt bikes.


I have owned/ridden/maintained Honda motorcycles for 35 years. I have written five books on Honda repairs and collecting. I was a service manager for two Honda shops back in the 1980s.

VJMC (Vintage Japanese Motorcycle Club) of North America

VJMC newsletter, as editor for two years and as contributing editor currently.

3 years auto shop in high school, teacher's aide in Automotive Technology in Jr. College, Diesel mechanic course in college, self-taught mechanic and automotive writer.

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