TS 250 gear noise

Forums Technical Two Stroke: Help needed TS 250 gear noise

Viewing 5 reply threads
  • Author
    Posts
    • #14011
      Keith Wilson
      Participant

      My super 5 engine clutch side is making a lot of noise.i suspect it’s the gear behind the clutch. I know there are shims of various sizes to take up the end float. Can this job be done with the engine on the bike? If so how do you measure the end float to use the correct shim? Any help would be appreciated.
      Keith.

    • #14012
      Andrew James
      Participant

      You can shim the crank end float with the engine in the bike easy enough. You need to set up a dial gauge to measure how much end float there is and then measure the shim you have and get a thicker shim to “correct” the end float back into tolerance. I had a nose which was worse when I pulled the clutch lever in indicated excess end float was causing the primary drive gears not to mesh cleanly. The MZ manual is easy enough to follow if you have access to the right tools to measure the end float and existing shim and to remove the clutch.

      I’m not sure but believe a more consistent “gearbox noise” may be because the primary gear itself needs shimming but I haven’t done that job, my noise was resolved when I got the crank end float in tolerance.

      If you haven’t got access to an MZ manual I could email an extract to cover shimming the end float

      Hope that helps

      Andy

    • #14013
      Keith Wilson
      Participant

      Thanks for the information. I have a manual thanks.will have to get a dial gauge before I remove the clutch.thanks again.keith.

    • #14028
      Keith Wilson
      Participant

      I have looked at the primary drive and all seems ok.ireplaced the bearing in the clutch cover.still have the knocking rattle? When clutch is disengaged it is still there.could it be the small end bearing? The bike had a rebore 5000 miles ago. The noise has increased the past 200 . Any thoughts?

    • #14072
      Andrew James
      Participant

      Sorry can’t offer any advice on that one Keith, adjusting the end float into tolerance sorted my clutch noise which was at its worse when the clutch lever was pulled in. It would appear you have a different issue to explore

    • #14075
      Keith Wilson
      Participant

      Thanks for your help.i have since stripped the engine down and discovered the big end was at fault.large amount of play. I have a new crank installed and took care to check the end float for the primary drive.
      My next challenge is to get the engine to start! I have a 12v vap system fitted which worked fine.i have a spark and the carb is cleaned maybe the timing is out?

Viewing 5 reply threads
  • You must be logged in to reply to this topic.