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just checked the valve and the ball was at 06:00. Looks like either the water pump or radiator at this point. Maybe I'll remove the WP and inspect it. I"m just not that ambitious right now, plus I have another cycle.

here's a pic of a little plastic valve just above the oil filter, not sure if this is the dump valve or if it's in the right position. The knob reads "Drain Off & On Pour". http://picasaweb.google.com/chadsprague/Vmax/photo#5233699106953511394

i don't have a manual and never did get a clear explanation on where the 'dump valve' is located

no, haven't rode it since replacing the thermostat.... contemplating replacing the water pump... really just want to sell the thing, but don't want to sell a lemon

thanks for all the suggestions... I will see if I can get an accurate coolant temp reading before I look into the radiator further or even the water pump. I originally suspected the water pump, but after dropping $60 for a thermostat I can't imagine what yamaha wants for a water pump. Also...

I'm sure the PO experienced cooling problems. He either replaced the thermo switch or thermostat or both. Flushed the cooling system and switched to some fancy coolant. The radiator itself doesn't looked clogged, it has a screen in front of it that is bug-free. The resevoir is at the right...

Haven't rode the bike since my initial post, but finally replaced the thermostat today. Purchased the replacement from K&N, $60 seemed kinda pricey. Made sure to 'burp' the cooling system while replacing fluid. I also added back about half of the Blue Ice and the rest distilled water. All I...

I'm not familiar with the 'dump valve'... I'll call K&N and go get a new thermostat today. I originally suspected an air bubble, but I've had that problem in other bikes and they will go straight to red no questions. This bike has been running ok until this recent hot spell in the 90's.

The fans come on pretty early, but like I said it's all easy highway riding. I actually pulled over the other day to get gas and let it cool off. Today I decided to wait it out and see if the needle would actually sweep completely into the red. Never actually was in the red but pretty close...

Bought my first vmax a few weeks ago and have been commuting 30miles to work each way. I have been keeping an eye on the temp, because the first day I bought it, the temp needle ran right up to red and scared the crap out of me. The PO said he had just flushed the radiator and filled it with...