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Honda TRX420TM FourTrax Rancher...


Owner: Rancher42013
Added on January 21, 2016


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2005 Honda TRX450R Running HOT!!! NEED HELP



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6 replies to this topic
  • XFR_Jay

    TT Newbie

8 posts
Location: Massachusetts

Posted November 19, 2007 - 08:59 AM


I have a friend who has a 2005 450r as you can tell from the title he is having problems with it overheating. He's owned the bike since new and never had a problem, recently he went with a 520 big bore kit and a vortex adjustable ignition. Since the changes he has had problems keeping it cool. It is properly jetted and we are from Massachusetts. He has a stock radiator and fan and we were wondering if people with the larger bore combos were running different radiators. Also we were wondering if anyone has a coolant temp guage installed so we could know what temp the fan should be turning on at.

Any import would be greatly appreciated.

Thanks in advance,
Jay

  • andyman450r

    TT Member

74 posts
Location: North Carolina

Posted November 29, 2007 - 08:22 AM


try engine ice. good stuff.

  • NO_FEAR

    TT Platinum Member

1,574 posts
Location: Maryland

Posted November 29, 2007 - 10:51 AM


Im sure a larger radiator will help ALOT!! But maybe even try to run a richer jetting, and yes 2x for engine ice! great product

  • aussie_450exc

    TT Member

52 posts
Location: Australia

Posted December 18, 2007 - 06:45 PM


Just wire the fan to direct power so it runs al the time while the key is on. Also when a radiator cap fails it will let coolant flow back to the overflow tank and the bike will get hot because the coolant system isn't under pressure. You can use stick on temp strips to see the temperature of different parts of your bike. I got one stuck to the head, top and bottom tanks on my radiator just to see when its getting a bit hot.

  • Denn10

    Get Help Now

6,151 posts
Location: California

Posted December 18, 2007 - 09:12 PM


engine ice wont drop the temp that much maybe only a few degrees. ICE is alot more for cooling down faster and not as much as keeping high temps down. It may be worth the $20 but a bigger radiator and maybe a bit richer jetting, not so rich that it runs bad but just a tad rich, will help alot. Why a 520 BB kit on an already fast engine???

  • 2 stokes for life

    TT Gold Member

1,333 posts
Location: British Columbia

Posted December 18, 2007 - 09:20 PM


Well, thats what happens when water jackets get real thin, they dont cool! So, like everyone eles has said, big rad, engine ice, run slightly rich, and a engine fan or 2.

  • Nohlen

    TT Bronze Member

134 posts
Location: Alabama

Posted January 21, 2016 - 10:23 AM


I have stock bore. And my 05 trx450r runs really hot. As well..





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