Just a general cooling system question . As it appears now that I will have to fabricate the upper cooling system hoses for my 97 section , I was wondering if anybody knew what the operating pressure of the radiator cap on most trials bikes is ?

or in other terms at what pressure will they release cooling system pressure ?

Thanks in advance !

Glenn

I thought the operating pressure was usually stamped on the cap?

Your right ! I neglected to read the fine print on the reservoir cap ! I thought it only said made in Italy ...

1.00 BAR or in my terms 14.5 psi .

Thanks for opening my eyes

Glenn

I had to replace my lower hose on my Section. It was so soft it would constrict when pulling coolant and overheat. I made a replacement out of a metal gas supply line for water heaters.

I may have to look into that for my 97 , I've got 2 each of the 2 lower hoses , but the top 2 hoses are unobtainium ! and mushy enough to scare me ...

I used to fabricate car heater lines for a show car or two when younger. It was to rid the engine bay of ugly, long rubber hoses.

I used 1/2 copper water pipe with 90 deg elbows or plumbers pipe bender to fab custom angle. It polished up well... joints were silver soldered.

I made the pipe terminate 1/2 inch before heater nipples and used a 1 inch or so length of suitable hose to join copper pipe to nipple or fitting via two jubilee clips (ring grips). So hose bit was straight and copper pipe did the turns.

Just an idea if you don't get some hoses? Just check copper is compatible in the glycol type before you start? Might not be? Don't want to accelerate cooling system corrosion.

Mags