radiator

  1. 836RADIO

    Information The experience sharing of debugging the coolant overflow issue

    Hi, I'm a KTM RC390 rider locate in Taiwan with some experience sharing in debugging the coolant overflow issue. Hope it will helpful for everyone if you are meeting related leakage problems. I use RC390 for commuting and touring every day, the bike never shows up the high-temp alarm, but often...
  2. N

    Radiator Loosing Fluid

    I changed my radiator and removed the thermostat. When I refilled it with water wetter, it filled up pretty quickly with probably about half a liter in the radiator. I filled the about 0.3 liter in the compensating tank. After a few track days and races, I saw that my compensating tank is empty...
  3. Y

    What's with all the rubber?

    It amazes me that a motorcycle with a marginal cooling system has so many obstructions to air passing through the radiator. I've disassembled my bike to make modifications, and there's rubber everywhere! I searched extensively, and the only thing could find was a suggestion by someone who...
  4. Kinetic Analysis

    2nd Radiator (real fix for your cooling problems for $750.00)

    Hey so I don't normally post and I know this could/should go in the technical forum, but I think this one is important. Many of you have notice by now that the RC390 is not, actually, Ready-To-Race. In fact it's not even ready for particularly hot weather. There are three problems that I had...
  5. Tom

    Stripped radiator bleed screw.

    I'm really not sure how this even happened. I stripped the radiator's bung for the bleed screw today... Worst part? I was only using a screw driver to tighten it back when it happened... I had to use a small ratchet wrench to loosen it while the engine was hot, then decided that in case more...
  6. Tom

    Upper radiator hose kink?

    Hello all, I decided to replace the green stuff with the factory suggested Motorex M3.0, I figured I may as well sleeve my radiator tubes while the bike is apart. I just finished putting heat sleeve on my radiator hoses, and I think I may have made a kink in the upper radiator hose during the...
  7. M

    proper routing of radiator drain hose

    I'm putting the left side panel back on, and I can't remember where the radiator overflow hose goes. As you can see in the photo, I have it fed through the proper hole, but I just don't know where to feed it after that so it doesn't get burned. Do I pull it through further? Then where does it...
  8. K

    Dreaded fan failure....

    Hi all, so it's happened, the radiator fan on my 2015 has decided to stop working on me, got a bit warm sitting at a stop sign the other day, so decided I'm not mucking around iv ordered the spal fan to upgrade, and plan on changing to engine ice as well since its drained. While its apart I'm...
  9. reenmachine

    Cheap & easy DIY radiator guard

    I had my radiator out to do the SPAL fan upgrade and thought I'd make a simple radiator guard while I was at it. I found this stainless steel mesh screen on amazon. It comes with three pieces, each just a little larger than the radiator core, all for $12. I trimmed it to size with tin snips...
  10. T

    Pls help rc390

    My rc390 started showing the low oil pressure light so I took it to the shop they told me it was a gasket at first then that it was a case bearing then that it was my radiator they ended up wanting to charge me 1400 dollars and I had gave them my bike still in the 1 year engine warranty they...
  11. D

    Radiator Fan KTM RC390

    Hullo from South Africa! Quick one, my KTM RC390 radiator fan has died. In South Africa we wait months for parts half the time and I am looking for an aftermarket fan. I've read a lot about SPAL being the preferred replacement but this is where my issue starts. What I would like to know is...
  12. Andy

    Samco Hoses

    I'm currently installing my Samco hose kit, 8 pieces which I know the four larger pipes attatch to engine/radiator and two thin pipes go from radiator to overflow/catch bottle. But what are the other two thin pipes for?
  13. mattv

    Radiator Bleed Screw Threads Stripped

    Think I stripped the threads in my radiator for the bleed screw. Has anybody done the same and tapped it for a bigger bolt successfully?
  14. N

    Removing Radiator Shrouds

    I wanted to put an R&G radiator guard on my 2017 RC 390; but the OEM radiator shroud needs to be removed to install it. What's the purpose of the radiator upper and lower shrouds? I was wondering if I can remove the shrouds to install the radiator guard and shed some weight.
  15. S

    Looking for an aftermarket/upgraded radiator?

    Anyone know if there's and aftermarket radiator available for the RC390? Thanks, Mike
  16. L

    Need help finding missing bolts

    Decided to change the oil today (just got the bike few weeks ago 950 miles on it) When removing the lower fairings there's what I'm assuming is some kind of radiator shrouds attached to it. not the one on the radiator but below it attached to the fairings. Upon removing the fairings it fell...
  17. Michelle

    Distilled Water

    I can not understand why its so hard to get hold of now ,, I have been everywhere for it ,, Wicks ,, B&Q ,, supermarkets.... Nothing so I have had to order it from the bay... I can get De-ionised water ,, man in the shop said its the same thing ,, I said its not... I was rather hoping to do my...
  18. H

    Purchased 2015 RC 390 w/214miles on it

    Knew nothing bout the bike but was satisfied with the older 690 Duke...heat issues became apparent almost immediately...came to this site and are ready to order the fan upgrade, already ordered 1.6 radiator cap and hoping they will solve the heat issues. I also noticed the plastic vanes in front...
  19. S

    Temps rise once bike is shut off, how to bleed the radiator?

    Hey all,So,here's the problem, When I run the bike for 20+ kms at high rpms continuously lets say in the twisties.it runs all fine but once i turn off the key,and turn it back on, themp bar goes all the way upto 11-12 bars and shows high coolant temp,but once I start the bike and let it run for...
  20. chevaliernoir

    over heating -> remove calorstat (?)

    Hello Our bikes are famous for over heating easily. I removed the grind in front of the radiator but it's not enough. I'm thinking to remove the calorstat inside the collant line, on order the water goes more easily to the radiator. Of course the engine will tame more time to warm up, but for...
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