Question about 1990 Yamaha FZR 1000

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Im a Harley tech and dont know much about the cooling systems on these bikes, havn't even removed the fairings yet but im overheating and just noticed some plastic part has bubbled on the left side and burnt through the fairing. Is this a hose? Where do I start and can I just flush out the radiator like on a car? Couldnt resist buying the bike only has 4000 miles, bought it from a 64 yr old guy who collects. Please help.

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The systems are like a car, but as they are all alloy there is not much debris that collects in the rad, so just flushing may not help, They have a thermostat, and a temp sender switch that turns on the fan,
At 21 years old there is a possibility the water pump seal is bad, if you top it up the coolant may come out a small 5mm telltale hole, on the RHS down near the crank, a rad pressure test may help locate this, but your going to have to undo a few screws and take the fairings off

Posted on May 27, 2011

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