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boyd hitchcock Posted on Oct 26, 2019
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Just bought 1975 Yamaha DT125. Wont shift into 3rd gear. All other gears work good. Did notice shift lever was bent.

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  • tombones Oct 26, 2019

    No 'probably about it, You have a bent shift fork. This requires a complete teardown of the transmission and is NOT something a novice mechanic should try.

  • tombones Oct 26, 2019

    Install new crankshaft bearings and seals while the gearbox is split open. You will be sorry if you don't. Source your parts including a gasket set before starting the project.

  • tombones Oct 26, 2019

    I wish I could be there and do the job just for the fun of it. I repaired bikes for 12 years. Understand, fun for me doesn't mean it would be fun for you. If inexperienced, you will probably end up with an engine in a box.

  • tombones Oct 26, 2019

    By the way, you will need an impact driver, case splitter tool, and a puller for the armature (flywheel).

  • tombones Oct 26, 2019

    Just so you know, you can make your bike a 175cc simply by mounting a 175 cylinder, piston, and rings. The 12volt starter will bog down on occasion due to the increased resistance of greater compression but the bike will be quicker and faster.

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Kory Keiper

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  • Posted on Oct 26, 2019
Kory Keiper
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It’s probably a bent shift fork inside the transmission part of the engine

sherlywang

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  • Posted on Oct 26, 2019
sherlywang
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Contact your supplier, they should give support to you.
For example, if users who buy diesel generator set with us, if they have maintenance question or fault, we will tell them the solutions.
This is suport website: www.dieselgeneratortech.com

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5 Related Answers

Anonymous

  • 6982 Answers
  • Posted on Mar 16, 2009

SOURCE: 02 jeep liberty won't shift into 3rd or 4th gear.

Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.

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Anonymous

  • 1305 Answers
  • Posted on May 10, 2009

SOURCE: 1999 F350 crew cab 4x4 ford, gear shift lever

Ok ready to stand on your head under the dash?
It's doable... there is a flange connected to the gearshift lever under the steering column. If you remove the lower dash cover where the fuses are, you should be able to see it when you move the gear shift lever... look around on the floor of the truck to see if you dropped a star-headed bolt or two... these bolts worked loose on my superduty and made shifting very difficult..it was an easy fix... let me know how you do on it.

Anonymous

  • 57 Answers
  • Posted on Aug 26, 2009

SOURCE: 06 ford focus 5spd. no 1st, 3rd, or 5th gear.

It sound like the gear linkage isn,t set up right, you wouldn,t always be able to engage a gear unless you rocked the car.

ghost45

PAUL MC G

  • 1280 Answers
  • Posted on Oct 18, 2009

SOURCE: 2001 Hyundai - reverse gear is inoperative. The

If I understand you correctly, you have ALL forward gears working, but reverse doesn't?... then the problem is in the transmission itself or the linkage on the trans linkage into reverse.

shark2th667

Michael Kent

  • 343 Answers
  • Posted on Oct 03, 2010

SOURCE: my 93 chevy truck wont shift into 3rd gear. goes

I say band adjustment in transmission, have done by shop. might be just a vacuum hose or modulator, but I don't think so

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sounds like gear box needs stripping and check allcogs and selecter forks etc for wear or damage! happened to me on a yamaha rd 200 ! P...
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