I am pretty sure the water pump is rpm activated....thus the more revs the more it pumps. I noticed this with my first few passes on NOS. No head gasket leak on mine. A friend of mine, 650maniac, had one of the first 760's other than Jeff's and his would regularly spray just a very small amount of anti-freeze after several high-revving passes. Are you sure it's the head gasket? Just my 2 cents....


LB

 

No, I am not sure, I hope it isn't, I guess I will try to find somebody to check it.. Thanks for the advise.

 

Big waynester- I see a lot of head gasket leaks around here. By the end of the day a few will be leaking. Under normal riding you never notice it. Shower down all day hard and some leak.

 

Big W Take it from me it is your Head Gasket!! Good news is Samcoe carries the new Head gasket for the Pami motors and his kits also. Give him a call. He is pretty spendy on it though. $56.00 Get a hold of SamcoeDs I think he may have a connection at a more reasonable price. Also when you put it back together use Pliobond or Yamabond. The Pliobond is the Shizznit!!![img]i/expressions/face-icon-small-happy.gif[/img] Good luck.

 

Just looking at the basics. Did you check your hose connections? I had the same problem and the hose clamps all shook loose.

 

Befor going off the deep end and pulling the head, check someing else first. I took great care when doing your motor, so it would surprize me if it was a head gasket leak.

Pull the clutch cover and look at the water pump seals. In some cases, water pump seals are installed backwards. This would let the motor run fine for a little while, but as the seals warmed up or wore a bit, case preasure[not combustion] would leak into the cooling system.

It is possible that it's a head gasket, but you would be much better off checking the seals first. If I had to put money on anything, that is were my money would be. I've seen many people do this with the seals [including a local dealer] and after replacing a couple of head gaskets that seamed OK, only to see the same issue, I figured out why. I had a helper working for me that was guilty of it himself.

 

Check all your hoses carefully first. Our 01 DS had a hose come loose and spray hot coolant on my dad. It was about 100 degrees this last weekend so my dad was wearing shorts when it happened, he got burned a little but he is ok. Sean

 

It does sound like a head gasket but you might want to do a hydrocarbon test to verify first. Most quality auto repair shops can do this for you and all they need is a sample of your coolant from the quad. Or you could buy a block test kit at a quality auto parts store for about $30 and about $6 for a bottle of test fluid and do it yourself. This test will tell you if there are any hydrocarbons in your coolant, if not then it isn't a head gasket. The only way for hydrocarbons to get into your coolant is from combustion gases. A leak down test might not be conclusive due to the potential for a small leak that only manifests itself "after about an hour of riding".

 

Most likely head gasket leak.

TVI has HD studs stiffer than PAMI. They work. I've got a set, no more leaks.

I also use HD studs for the 8mm bolts.

I've cleaned my head up a couple times. Even 0.001" of warp is enough to cause a leak.

Make sure radiator cap is tight enough. You can bend the radiator cap tabs in a little to make tighter.

Make sure the coolant overflow tube is air tight at the radiator. I replaced my clamp with a better one.

 

we pulled the clutch cover today and checked the water pump seals, they were correct.
we pulled the head cover and cams to check head bolt torque - they were loose slightly. two of them starting turning before the wrench reached 40 lbs., the other two just after 40. we torqued to 55, Wayne called Gary at TVI and this is what he said to torque them on the 760 - what do you guys torque them to?
You think the studs stretched? i'm sure they were torqued correctly as Knutz said, no doubts there, but they got looser over time, and probably less than 10 hours motor time I'd guess.
He hasn't ridden yet since we finished, not sure if it'll be okay though, gotta wonder if the gasket will seal once it has already leaked.

hey I like the suggestin of hydrocarbon test - that's a good point, thanks Ken.