ATC 110 Shifts like crap

Discussion in 'The Gastank' started by RadRacer203, Jul 12, 2020.

  1. RadRacer203

    RadRacer203 Member

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    So a bit of backstory- I got this '79 ATC 110 from a guy in New Jersey for $50 a couple years ago. Fixed it up with new tires and miscellaneous maintenance and it was running absolutely perfectly and was so much fun! I've been riding it up until about 3 months ago when the original clutch finally gave up ,and I decided to replace everything that could be worn in one go. I was away for a while after that so I rebuilt it about 2 months ago. I put in new springs, plates, friction plates, and a new gasket. After I got it back together I was trying to adjust the clutch and it would miss shifts and just generally feel like crap going through the gears. I managed to get a shop manual from someone down the street and I realized I had stupidly put the friction plates in dry and put a spring in the wrong place. So I got frustrated and walked away until today. I had gotten some new friction disk and a new gasket, and soaked the disks in oil for a full day before putting them in. I followed the manual to the letter, got everything back together, and it shifts like crap again. Is there anyone in the New England area that can help me? I really need some help from someone more experienced than I am. I know I didn't screw anything up too bad, checked everything over for wear and damage before assembling it. I'm pissed off at myself, pissed off at the bike, and about ready to push it off a cliff and I could really use a hand cause I'm at my wit's end.
     
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  3. lukelaw1

    lukelaw1 Active Member

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    Is the clutch slipping while driving or slipping when started? The purpose of the clutch is to shift torque from the crank to the drive train, in this case gears. granted the clutch does need to have the proper preload set; however, if the problem is truly with shifting, i would be looking into your gears, shift forks, shift pins, and etc.
     
  4. lukelaw1

    lukelaw1 Active Member

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    not to familiar with 110, are they a manual clutch with 4 speed transmission?
     
  5. RadRacer203

    RadRacer203 Member

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    They're a semi auto 4 speed, basically the same motor as the trail 90 and 110 but without the kickstart
     
  6. lukelaw1

    lukelaw1 Active Member

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    have you properly set the clutch preload?
     
  7. RadRacer203

    RadRacer203 Member

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    You mean just screw it all the way in then a quarter turn out? I was messing with it for about two hours yesterday
     
  8. lukelaw1

    lukelaw1 Active Member

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    No I believe you loosen the jam but and turn the adjuster counterclockwise until resistance is felt then turn clockwise 1/8 to 1/4 turn and tighten jam nut.

    Just watch new you tighten the jam nut that the adjuster doesn't turn with it.

     
  9. RadRacer203

    RadRacer203 Member

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    Well shit. That was the problem, I'm just an idiot! Thanks so much for your help, I never would have gotten that
     
  10. lukelaw1

    lukelaw1 Active Member

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    The only thing I really don't like about his video is when he held down the shifter revved the bike and dumped the shifter. That is super hard on the tranny. Maybe is next video will be transmission replacement.

    Glad to hear you got your toy back on the trail.
     
  11. racerx

    racerx Administrator
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    Probably toughest on the clutch and rider. It's the same as dumping a hand clutch...but without the control of having a stable riding position while doing this. Seems like an efficient way to dump a bike, imo...
     

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