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  1. COPTEC1

    99 yz400f hurricane conversion

    I will look into 426 radiators.HUMMM---MORE COOLING? WHY THE HELL NOT!! as far as the tank ---IMS black tank cuz black goes with everything. I really appreciate all the help and info. I will photo capture the entire process and i am going to powder coat the frame black.
  2. does anybody know what differences there are between the tank and plastics of a 99 yz400 and a 2000-2002 yz426. i want to do a hurricane conversion but was told by one industries that their kit for the 2000-2002 yz426 would not fit my 99 because the plastics are different. I appreciate any help. thanks:ride:
  3. COPTEC1

    '03 450 Hurricane Conversion - Pics

    I myself would love to do the hurricane conversion but I have a 99 yz400. I contacted one industries about their kit and was told the plastics are different . I dont give up easy so I checked to see if there is a difference between the tanks of my 99 and that of a 2000-2002 426 and they are the same. so if you guys might know just what is so different about them I can come up with a plan on how to pull this off. I have never liked blue yamahas. i guess I am old school and think that a yz should be yellow. my first was a 76 yz125 when i was 11 and i will soon be 41 and still love the yamadogs.
  4. COPTEC1

    Auto Decomp Cam

    Thanks for all the info. I have the cams on order at the local bike shop. should have them monday or tuesday.
  5. COPTEC1

    Auto Decomp Cam

    how hard is it to install an auto decomp cam in a 99 yz400f . do they really help?
  6. COPTEC1

    Pitbike Running Problem

    gapped a new ngk at .010 and it made no change
  7. COPTEC1

    Pitbike Running Problem

    I need help guys. I have a little chinese honda knock off that my 7 yo son rides. problem is when he puts it under a load in 2nd or 3rd it misses real bad. I put a spark plug in it and relaced the plug wire ( it had a burnt spot from the exhaust). could it be the cdi box or the coil or both? I ruled out the carb after i took it apart and cleaned it( was not even dirty inside but i ran some cleaner thru anyhow).
  8. COPTEC1

    Electric Cooling Fan On A Yz400f

    We are actually limited to a couple of places to ride trails unless you know someone with a bunch of property
  9. COPTEC1

    Electric Cooling Fan On A Yz400f

    Yea i think the guy thinks he is funny. my son just started riding and i dont want to push him you know. i think i will try some engine ice . thats what everybody has been telling me at the yamaha dealer.hey i bet you guys in new zealand have some awesome places to ride huh?
  10. COPTEC1

    Electric Cooling Fan On A Yz400f

    I ride with my seven yo son and he does not ride that fast yet so thats not an option
  11. Does anyone know if its possible to put a cooling fan on a yz400f and if so what needs to be done.
  12. I just want to say thanks to all that gave advice on getting my yz400f up and running.I put a new plug in it this morning and this afternoon i hopped on it ,followed the starting instructions to the letter and it fired right up and I was feelin like a little kid again. This has to be bar none the baddest bike have ever ridden.I see me havin a lot of fun with this beast.Only bad thing,I broke the secondary throttle cable today but I can still ride so NOT SO BAD HUH
  13. COPTEC1

    New To Yz400f

    thanks for the advice. i will try that tommorow
  14. COPTEC1

    New To Yz400f

    Just got a 99 yz400f. The guy i bought it from had a hell of a time starting it but it eventually fired. The outside temp was in the low 50's. I tried to start it today without any positive results. What gives with this ? Is this normal? The guy i bought it from said they were hard to start in cold weather. Any help would be very cool.thanks