Forgot to add, looking at it last night the reservoir tank is below the rad - so is there some sort of one way valve required that fluid can only go into the rad from the reservoir? I get on some systems expanded fluid could go into a header tank, (so no one way valve), but on these Gen 1's - if it's lower than the rad, shouldn't there be something stopping the fluid going into the reservoir tank - even if it's just pipe routing up and then down? If it is routing, then does anyone know which pipe goes from the rad to the reservoir tank, and how it's routed?
Cheers
Markie "Frustrated of Hampshire" Wales
Lift the tank and you'll see the expansion tank pipe running over the top of the engine. It shouldn't gravity fill, that's for sure.
Have you checked the thermostat, Markie?
the reservoir is just an expansion tank so doesn't work by gravity. the expanded water goes into the tank and is sucked back as it cools again i believe.
it could only fill while filling rad if the water was going down the overflow pipe (i think)
Well problem solved. As I had begun to suspect the over flow pipe (at the top of the filler neck) and the carb heater pipe (1/5 way down the radiator) were swapped over. Easy mistake to make when rebuilding a bike I suppose, and with 1/5 less water in the rad didn't notice until the weather got a bit warmer.
So I didn't need the new rad cap, and been through several litres of coolant sorting it out!
Once I traced the hoses to see they were indeed incorrectly routed/connected, swapped them over, refilled the rad and reservoir tank, fired it up and all was good. Will take out for an extended ride over the weekend with plenty of stops to check but all looking good.
cheers
Markie
15-07-16, 06:04 PM
(This post was last modified: 16-07-16, 07:47 PM by markie_wales.)
Dave, yup great when you sort something out before the weekend. Out for a few sherbets tonight with a crowd as it's my birthday next weekend, so the beer will taste that little bit sweeter, and no nagging thoughts at the back of my mind!
Cheers
Markie
A Result, well done Markie.
Stupid things like that cause all sorts of thoughts to run through your mind and us bikers we tend to think of the worse case scenario.
Really glad its sorted, a couple of minutes swapping the two pipes over and jobs-a-goodun. :thumbup [size=78%] [/size]
well done on sorting it,, certainly was a weird one 8)
glad to see you sorted it,
Ive just bought my Fazer and have noticed its getting very hot very quickly,
the header tank was low so I topped it up, didn't like the look of the other residue in there, or the residue on the rad cap...
Im seriously thinking head gasket, but hoping its not.
anything else i can do and has anyone tried that steel seal I've seen?
gutted!
on mine, couldn't just be a thermostat could it?
Suspecting overflow and carb heater hoses may be swapped over. 
