Flaws

Hy guys, Does anybody know of any problems the 04 450 has? Have they fixed the week valve problem? Is there anything i should watch out for? :)

Hy guys, Does anybody know of any problems the 04 450 has? Have they fixed the week valve problem? Is there anything i should watch out for? :)

Oops, Saw the header and thought you were talking about my wife. :D :D

My '04 is still kicken strong... so far. KNOCK ON WOOD. :)

Mine is fine, except you have to be careful not to twist that throttle thingy too hard.

Mine is fine, except you have to be careful not to twist that throttle thingy too hard.

02' and 03' have the same problem.

mine rocks...no probs other then a head gasket which was my error from being WFO too long.

Might want to watch the torque on the rear axle nut. I think Honda says 95 lbs., mine ended up pulling the threads back then cross threading itself. When I went to remove it, the axle spun in the axle block. After an hour cutting I had to replace the axle, nut, and left axle block. Now I tighten it to 80lbs.

Also, be vigilant about checking the spokes the first few rides.

Thanks for the heads up. :)

Another buddy and I have been trying to figure the valve deal out. Best we can tell it's related to heat. Excessive heat "may" be the culprit. Whether it is or is not, the following is good advice:

*Keep your engine as cool as possible.

1) do not idle long.

2) do use engine ice, red line, etc. in place of anti-freeze in summer months

3) do use quality synthetic engine oil.

4) careful using radiator guards/don't block airflow

5) watch out for tight trail riding/ motocross in the heat of summer - keep airflow across radiators

6) keep your bike jetted correctly/ not too lean

7) clean air filter

8) unobstructed radiator fins

best of luck! it's an awesome bike :)

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Similar Content

    • By jakebarritt
      I have a 2005 CRF450R with a Trail Tech fan kit installed. I need a little bit larger tank and would like to know if anyone has an aftermarket tank that fits with the fan kit.
      I dont need a monster 4 gallon, just maybe a 2.4 or 2.7 from IMS would do fine.  I talked with both the tank vendor and Trail Tech and neither could give me any answers.
      Thanks guys.
      Jake
      Minden, NV
    • By smythe
      Complete 2009 CRF 450r cylinder head with valvetrain.
    • By NickC18
      So I emailed Factory Connection today to see what spring rate I need for the rear as I’m about 6’2” 220 lbs without gear. I also asked for a baseline front fork PSI to start at. This is what I received:
      Nicholas, 
      The spring series we made for your bike is limited when it comes to larger/stiffer rates.  
      The spring rate you need is 5.9/6.0 range. We don’t sell that over the counter as it requires special installation process.  So we can’t sell the spring “over the counter”.  It would have to be installed at our shop.  
      Fork PSI I would recommend:
      Inner 160 psi
      Outer 11 psi
      Balance 160 psi
       
      Are they blowing smoke up my ass? What kind of ‘special installation’ could a spring take? I’ve changed and removed them before but not on a 16’ CRF before.
      Also, aren’t those psi settings for the Kawasaki KYB? I don’t think the psf2 have inner/outer/balance do they? Maybe he was having a bad day...or maybe I’m an idiot. FC’s website list there spring as ALS-0059. Can I not just order this spring and install it to set my sag correctly? Help?
    • By johnsbikerepairs
      hi, i have a crf450R 2009, having difficulty setting the idle knob to factory setting.  Having problems interpreting manual Japaneses interpretation.  Can anyone out there assist with the correct factory setting and how i can manually do the setting ie how many clicks out or in etc...   would appreciate any assistance 
    • By Baja Designs
      Hello CRF450R Owners,
      Bailey here with Baja Designs.  We recognize ThumperTalk as one of the go-to sources for information on the CRF450R and we receive emails daily regarding the best inexpensive light setup or purchasing the B1K setup ran by Ox Motorsports.  We would like this thread to be a General Discussion area for members and guests to discuss Dual Sport Kits (DSK), Lights, and Lighting Acessories based upon stock and modified charging systems.  Please Post up if you have any questions or comments CRF450R related! 
      www.bajadesigns.com