Fixing the 1980 yz465

Discussion in '2 smokers' started by mudmantra, Jun 19, 2012.

  1. mudmantra

    mudmantra Been here awhile

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    I also found this. I've been told that a leaking crankshaft seal could cause a lean condition and ruin a motor too. And before I got the bike, a leaking base gasket was replaced. Maybe not good also.
    [​IMG]
    #41
  2. wfopete

    wfopete Suffer Fools; Gladly!

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    Mudmantra; PM sent.
    #42
  3. ADK

    ADK *********************

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    I had one of these , bought new. :thumb
    I wish I could be restored to my 1980 condition. :evil
    #43
  4. mudmantra

    mudmantra Been here awhile

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    Yes I wish I could too. But when I fire up the YZ465 I feel 30 years younger. Much cooler to me than the newer refined bikes. Plus you click it into gear and it takes off like an absolute dragster. :bmwrider
    #44
  5. mudmantra

    mudmantra Been here awhile

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    Installed a new crankshaft seal. Started the beast, after I remembered to turn the gas on. :huh I have to remember that out is off, and in is on. :lol3 On the bright side and got more kick start practice. Blasted up the hill and almost flipped it over on the first hill climb. That was a rush.:eek1 :D Things to fix. Silencer is still not mounted right. Pipe needs to be removed and mounted with the Yamaha dampers. The head pipe only has 2 springs, I think it needs 3. I think the pipe needs another hook brazed on it. If anyone has a picture of that, it would help. I need to look at the brakes too. the front completely stopped working. Might be an adjustment, but a better look them over, just in case I need to stop.
    #45
  6. anotherguy

    anotherguy Long timer

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    Yeah my bike has three springs,safety wired at that. The third goes to a washer on the front cylinder base stud.
    #46
  7. mudmantra

    mudmantra Been here awhile

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    The 2 springs I have now are going a washer on the front stud. I think I need a longer spring to go to the cylinder. That might balance it out. How many spring mounts do you have on the pipe?
    #47
  8. Twin-shocker

    Twin-shocker Long timer

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    Sell it and buy a more modern enduro type 200 would be the best possible advice here. The negatives against using a worn out out big bore MX bike for trail riding, are far more than the positives, and the difficulty in starting a 465 alone is a good reason to opt for a 200.
    #48
  9. anotherguy

    anotherguy Long timer

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    Shut the fuck up Captain Contrary. Find something other than your overinflated ego to massage.
    #49
  10. dtysdalx2

    dtysdalx2 Just glad to be here.

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    :huh

    :lol3
    #50
  11. Mr. Carts

    Mr. Carts Been here awhile

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    Some guys, myself included just perfer riding old bikes.

    I would not own a new bike if I got it for FREE. It would be on Craigslist and out the door with the money spent on some old cool bikes from back when I was a kid.
    #51
  12. ctune80

    ctune80 Been here awhile

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    A YZ465 makes a great trailbike. It's also an easy starting bike IMO.
    #52
  13. mudmantra

    mudmantra Been here awhile

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    I'm getting the starting routine down to an acceptable routine. Step 1. always turn the gas on. I think even a new bike would have a problem, if I left that step out. :lol3 Once the YZ465 is warm, it's easier to kick and starts on one or two kicks. Most of the time on one kick. I think the only way I could sell my YZ465, would be If I already had another YZ465 in much better condition, plus I knew it was going to someone who really would enjoy it. :beer
    #53
  14. Twin-shocker

    Twin-shocker Long timer

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    I wonder have you ever tried something like a KDX200? It will do pretty much everything better than your 465, as well as being a lot easier to ride quickly in tight woods riding conditions.
    #54
  15. mudmantra

    mudmantra Been here awhile

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    I like the KDX200. I might even buy one some day. But it's not the same kind of beast the YZ465 is. Even the IT200 would be easier to ride, but that's not what it's about for me. Right now I just plan on setting the YZ465 up the best I can, and go have some fun. BTW I also have the remains of a 1982 YZ490. It's considered the worst bike ever by some. I might bring it back to life after I fix the YZ465, just as an act of defiance. Setting that beast up well be all kinds of fun. :ricky
    #55
  16. mudmantra

    mudmantra Been here awhile

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    More stuff to do. I got some jets and I got ready to do some more work. First a run test and a short ride. This was the first time I rode the bike on a hard surface. Rolling the throttle on in the first 4 gears pulled the front end up with ease. I couldn't try 5th because I ran out of room, plus I discovered (again) that the brakes don't work. The fronts stick and the back brakes do nothing. I better fix that. New shoes on order now. I need to install my silencer, It won't fit right unless the pipe is mounted right. New springs on order and I have to drill the new mount I welded to the pipe, for the Yamaha rubber mount to fit. I also discovered some small cracks in the pipe, So I'll fix those too. Still lots to fix. I'll try to do the carburetor, exhaust and brakes first. And work the other things in as I go.
    [​IMG]
    #56
  17. crg infidel

    crg infidel Adventurer

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    Nice YZ!!! That looks like a great old bike. I'm after an IT465, so I'm following your progress.
    #57
  18. mudmantra

    mudmantra Been here awhile

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    Cool, :beer I'd like a IT465 or IT490's also. I'm still working on the yz465. Just pulled the clutch cover off to check the condition of the motor, and installed a new cover gasket. The rear brakes just arrived, I'll put them in too. New pipe on order. Going to still weld the old pipe as a spare, and now I'll know exactly where to install the brackets. Plus I just picked up another YZ to keep it company. Getting it ready for the woods should be fun also.
    [​IMG]
    #58
  19. brucifer

    brucifer Long timer

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    Excellent! Was that pic taken at the old Cooper tire place?
    #59
  20. mudmantra

    mudmantra Been here awhile

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    The picture is behind the old caterpillar shop. I should have enough room to get the jetting dialed in. Right now I'm waiting on the intake for the YZ490. It's cracked beyond use. The intake side of the piston looks perfect. The carburetor looks like it has stock jetting. I modified the YZ465 carburetor slide to a 3.5 today. It took a little longer than I expected. While I removed the metal it seemed like a lot, but the picture looks not that dramatic. Right modified, left stock. Now to check the carburetor one more time, to make sure I have the right jets. I don't know where to set the needle, I think it's in the middle groove now.
    [​IMG]
    #60