Posted May 14, 2002 - 08:01 AM
my 98 yz400 was over heating in slow stuff
so i added a overflow tank off a wr.
the cap isnt an air tight seal and it seemd to empty but never fill
still the bike over heated
so i tried a 1.6 rad cap off a kx500
ok so as far as i can tell its not bubbled over since,
but twice now there has been water leaking from the front of the barrel, from the o-ring on the metal tube that connects to the water hoses.
i assume the higher pressure from the rad cap is highlighting other weak links in the cooling chain.
ive replaced the o-ring once and am about to do it again.
ive been filling the radiator to the top with pure distilled water, i guess the higher pressure cap isnt allowing the excess water to vent.
ideally id like some WR / YZ426 radiators which are slightly wider.
any ideas how i can cure this so i dont keep blowing orings?
Posted May 14, 2002 - 09:02 PM
Posted May 15, 2002 - 01:42 AM
Posted May 15, 2002 - 01:51 AM
1. Redline Water Wetter in the radiator. supposed to make it run cooler.
2. Vented front Number plate
3. Drill a series of 3/16 holes on your radiator guards "black louvered things" to get more air to flow.
4. Boysen is supposed to be making a new water pump cover and impeller that is supposed to flow more coolant. IE run cooler.
5. Have a radiator shop strip the paint off the radiators. Bare aluminum is supposed to disipate heat away better than w/ paint.
6. Ive seen some company offer a fined round tubular aluminum gizmo that goes inline of your radiator line. It is supposed to help disapate heat. Looks a little sketchy to me though.
Ive done the top 3 things and it seams to help mine. I diddn't want to do a higher pressure cap. That diddn't seam like the right thing to do as you are finding out. Hope this helps.
Posted May 15, 2002 - 01:53 AM