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Author Topic: 1983 YZ 490  (Read 2776 times)

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Offline Nailhead

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1983 YZ 490
« on: May 17, 2012, 04:57:51 AM »
I have been building this bike for the last few months to run in the evo class. It probably isn't the ideal bike but for most of our GP's it should work well. Al Holley engine, ProForm pipe and silencer, TBT suspension, JT Racing replica stadium plate, DC Plastics side panels, wide pegs from a CR250, all new motion pro cables & levers,  and lots of OEM goodies that I have found. Still need to restore the tank, but its been built to be ridden.   


« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline riffraff

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1983 YZ 490
« Reply #1 on: May 17, 2012, 05:49:25 AM »
Looks good Nailhead. I just sold my '89 YZ490 to a friend and picked up an '81 IT465. I can't resist big bore air cooled bikes.   :D
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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aaahhhhh yes, I remember the good old days

Offline SachsGS

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1983 YZ 490
« Reply #2 on: May 17, 2012, 04:18:42 PM »
Looks good!Did you do the cylinder head mod?
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline Brap

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1983 YZ 490
« Reply #3 on: May 20, 2012, 12:52:40 PM »
Can we see video of you riding it and shifting through the gears
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline Nailhead

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1983 YZ 490
« Reply #4 on: May 21, 2012, 03:35:49 PM »
Quote from: SachsGS on May 17, 2012, 11:18:42 PM
Looks good!Did you do the cylinder head mod?
Yes, did both the cylinder & the head mods.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline MXLord327

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1983 YZ 490
« Reply #5 on: May 23, 2012, 01:36:23 PM »
That year YZ490 was the first Open Class 2 stroke I ever rode, it had the proper head mods and porting to get rid of the detonation and blubbering.  I was racing a YZ125 and a Maico 250 that year and got to ride the bike at my practice track.  I remember twisting the throttle WFO and thinking I wasn't going very fast because it wasn't screaming at 10,000 RPM, until I hit the first corner going about 20 mph faster than I expected and blew right through!!!  Even though I am faster around a track on a 125, I still love Open Class 2 strokes!!!!  Your bike looks great!
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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