1986 Yamaha YZ490 S 17

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Vital MX member vmx3
36070 vmx3 https://p.vitalmx.com/photos/users/36070/avatar/c50_Farleigh_VetsMXdN_2012_127.jpg?1351695282 https://www.vitalmx.com/community/vmx3,36070/all 10/31/12 3 6 https://www.vitalmx.com/community/vmx3,36070/setup 11 222 26 1
Bike of the Day! 2-9-17

Farleigh Castle Vets MXdN 2016
Bike of the Day! 2-9-17

Farleigh Castle Vets MXdN 2016 What I started with, found by a friend on a forum for $300 tear down begins I made a skid plate for it, not only for the look but it helps eliminate the frame flex that these old 490's used to suffer from All powder coated and ready to go together, the frame should have been red because it's an '86 but I wanted it to look like the rest of the Team International Air Hammer bikes Excel did the silver rims, which was stock 88 on and EBC supplied the rotor. On the back I went with a 19inch over the stock 18 incher Tom Morgan Racing worked his magic over the motor and Installed a crank that Crank works Inc. rebuilt, balanced & trued. These mods transformed the how the bike revved and made power. It's a joy to ride. Pro-Form racing supplied the Exhaust pipe and silencer the front end came off an 89 YZ250 Throttle Jockey provided the team graphics All finished and ready to be shipped to be shipped to Farleigh castle for the Vets MXdN Finally at Farleigh, it seemed like the bike wouldn't make it on time but thankfully it did. The very first ride on the bike was qualifying on Saturday Morning EVO500 Moto #1 Sunday morning EVO500 Moto #2
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General Info Additional Info
Model Year 1986
Brand Yamaha
Model YZ
Engine Size Other 490
Engine Type 2-Stroke Air Cooled
Engine Type 2-Stroke
Parts Brand Model Additional info
Graphics Throttle Jockey
Plastic UFO
Handlebar Renthal
Grips Renthal
Clutch Lever Works Connection
Seat Other
Footpegs IMS
Exhaust Other
Clutch Other EBC
Piston Wiseco
Air Filter Twin Air
Air Intake Boysesen
Engine Mods Tom Morgan Crank Works Inc. Crank Crank Works Inc. Crank
Fork Kayaba
Rear Shock Kayaba
Suspension Mods Race Tech
Tires Bridgestone
Rims Excel
Sprockets Renthal
Chain RK
Brakes Nissin
Brake Pads EBC
Brake Rotors EBC
Oils/Lubes Maxima
Additional Info Tom Morgan Racing Modified the Engine and installed a Crankshaft that was rebuilt, trued and balanced by Crank Works Inc.
Gear Brand Model Additional info
Goggles 100%
Jersey Troy Lee Designs
Gloves Troy Lee Designs
Helmet Troy Lee Designs
Pants Troy Lee Designs
Boots Alpinestars
Knee Protection AXO
  • ctune

    8/26/2017 11:29 AM

    What rear wheel did you use? I'm guessing it's not a Z spoke rear?

  • vmx3

    8/26/2017 7:42 PM

    It is a Z-spoke, stock hub just with 19 inch rim and Buchanan Z spokes

  • Pal

    8/19/2017 1:43 PM

    Enjoyed looking at the pictures, great to see the bike being used too.

  • vmx3

    8/21/2017 8:53 PM

    Thanks, anything I build I do it to ride

  • Mark Vernon

    2/11/2017 12:46 AM

    Hi all I'm new to the forum and notice there is some love here for the 490, I have just bought a low hour 85 one that has recently been imported to the UK from the States . I want to upgrade a few things inc the head mod, but I bought it really because I had one in the day and vintage mx is big over here now and I thought I could have fun with a n investment. The bike is totally standard and very clean, any advice would be much appreciated.

  • sjsingle1

    10/24/2014 8:47 PM

    sweet ride ! ....I am in the middle of my 86 rebuild.....not as far along as I want to be

  • Hal_396

    10/3/2014 2:38 PM

    God I had a 87 YZ490 and I think it was the worst bike I have ever owned. I turned it into a Glamis sand dune bike with a paddle tire and all. The bike excelled in that environment.

  • vmx3

    10/6/2014 6:14 AM

    They are not so bad if you do a couple small mods to them

  • Vecchia Scuola

    10/3/2014 6:48 AM

    Love it!
    The Italian flag on the thank means "Rebuild in Italy"?
    BTW you must be single tu fill your kitchen that way..!

  • vmx3

    10/3/2014 9:14 AM


    The flag is actually green, white & orange which is the Irish flag, I built it here in the USA, in Indianapolis but Im originally from Ireland and after I finished building it I shipped it over to England so I could do the Vets MXdN on it.

    I'm not single, I just have a very understanding woman who likes bikes and racing as much as I do.

  • Detroit Dick

    10/2/2014 6:09 PM

    Straight-up Moto Porn there.

  • Detroit Dick

    9/9/2014 9:17 PM

    That's a Thing Of Beauty. Nice Work!

  • vmx3

    9/26/2014 1:31 PM

    Thanks a lot

  • nc_mx_kid

    9/7/2014 2:28 PM

    nice build!

  • vmx3

    9/26/2014 1:31 PM


  • Roostarvo

    9/6/2014 8:30 AM

    I like the way you do your work. The heck with the garage,use the kitchen and dining room. Really good pics of the work,and bike came out Excellent!!

  • vmx3

    9/26/2014 1:33 PM

    Thanks, the truth is that the garage is full of projects and I had a deadline to get this thing done in time for Farleigh so in the kitchen it went and its actually a perfect place to build a bike lol

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