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DOUG JAEGER Posted on May 23, 2018
Answered by a Fixya Expert

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Yamaha 1980 MX 80 Front Fork Disassembly? - Yamaha Motorcycles

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johnny bonacci

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  • Expert 325 Answers
  • Posted on May 23, 2018
johnny bonacci
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Start off by removing the forks from the bike, then remove the top caps (bolts) from the forks. Once removed take out the spacer and fork springs from the forks. Tip them upside down to get the fork oil out. Now with the forks empty from fluid and springs you will compress the forks all the way to make them as short as possible. You will need a fork dampening tool or a air gun to split the forks by removing the bolt inside the fork tubes. Once this is achieved you can pull the forks apart and replace the fork seals. When putting fork oil back into the forks if you are not sure how much to put back in, just compress the forks all the way down and fill each leg 6 inches from the top. That amount works for just about any motorcycle with conventional forks. Use 10 w fork oil.

Testimonial: "Thank You but this does not apply to this model, it has sealed stanchions and no retaining screws in the fork cylinders. ??"

5 Related Answers

tombones

  • 3567 Answers
  • Posted on Jul 06, 2009

SOURCE: i have a 2004 yamaha midnite roadstar silverado i

The axle looks pretty solid to me. I have NEVER seen a hollow axle. This sounds like one of those "Trick" items that is supposed to make the bike lighter and faster (and more prone to crash due to a weak axle). For safety reasons I would get a new axle.

Can I get a “very helpful” rating on this answer? < And it doesn’t cost anything extra!

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Anonymous

  • 4 Answers
  • Posted on Aug 19, 2009

SOURCE: yamaha mx 80 vin#367-605359

The MX80s didn't have true VIN 3s. The # you are referencing is a serial #, and there's no real system to what #s indicate what years. My local dealer has some sort of guide that they've been able to use to tell me the years of a couple of MX80s I've found (I've been looking for a decent one to restore). I would think all dealers would have this same info.

Anonymous

  • 1167 Answers
  • Posted on Nov 01, 2009

SOURCE: fork oil capacity

medium fork oil - 150 mls in each leg

Knight 007

Murtaza Akberali Versi

  • 767 Answers
  • Posted on Jan 28, 2010

SOURCE: Yamaha xj 900 s Front fork oil amount in cm

The forks hold 286ml or 9.67 US OZ of oil, best would be to use hydraulic oil.
Good Luck.

Anonymous

  • 3 Answers
  • Posted on Aug 21, 2010

SOURCE: i want to know how much fork oil is put in the

238 cc's, or 8.38 imperial ounces, or 8.05 U.S. ounces in each fork tube.

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