Radiator gremlins

6 replies to this topic
  • Jason_Williams

Posted August 28, 2001 - 05:32 AM


Something has been bending the cooling fins on the back side of my rad. The fronts are near perfect. This is very puzzling!!! I can't figure out how anything is getting behind there and having enough force to bend the fins!! If the front fins were bent I would fully understand but the backs????

very stumped :)

  • WR_Jason

Posted August 28, 2001 - 06:31 AM


Are they bend up or down? Maybe water comming off the front wheel when blasting shallow water at high speeds? Either that or little kids! Little kids will touch all kinds of stuff if they can get their sticky mitts on it. Kinda like those mice that build nest in the airbox :) .

  • Scott_F

Posted August 28, 2001 - 07:45 AM


It could be from washing the bike, especially a pressure washer. A scribe does a nice job of straightening fins, but it is very tedious.

[This message has been edited by Scott F (edited August 28, 2001).]

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • John_H

Posted August 28, 2001 - 12:00 PM


I've bent the cooling fins on my car radiator before by using high pressure H2O. It doesn't take much. The maintenance man at a hospital I worked at had some plastic tools for straightening them back out. They looked similar to a comb with short square teeth and he had different sizes to fit wider or narrower fins. Don't know where he got them, but I'm sure either autoparts store or Granger.

  • Bill

Posted August 28, 2001 - 12:40 PM


You can also find some pliers that have the zig-zag shape. Their sold the concourse car guys for straightening the fins on their radiators prior to shows. You can find them in Hemmings.


99 WR400f, YZ timed, MX-Tech suspension, Scotts steering damper, White Bros E-Series (12 discs), tapered header and a/f. Kouba T-handle for the fuel screw. Works Connection billet throttle tube and frame guards. Cycra Pro-Bend, triple clamp mount handguards. Thumper Racing rad guards, Renthal Jimmy Button highs, YZ Tank and IMS seat, YZ number plate, odo removed, EKP #4, 50PJ, 175MJ at 500-1000' Thanks James Dean!

  • Jason_Williams

Posted August 29, 2001 - 06:27 AM


It must be from washing the bike. I have never used a power washer but I do use pretty high pressure. Thanks for the tips on straightening things out.

  • Flamed1

Posted August 29, 2001 - 10:36 AM


You are not alone. I recently noticed the same phenomenon. I do not even wash my bike so power washers are not the problem :) No solution, just wanted you to know you are not alone on this one! I will keep an eye on it and post any findings.
Keep Roostin'

Life is nothing but a game.... he who has the most fun wins!


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.