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#13036
♠️ M77
Keymaster

Hmmm, i got Just a few questions to build some understanding & hopefully we can see why it’s doing what you describe;

  • What oil did you use ?   and what grade ?  20w60 ? 5w30?
  • Did you change the oil filter ?
  • Did you adjust the cable ?   (Remove the cable from the clutch cover , then make sure the arm doesn’t have too much play going on ?)
  • Does the clutch make any noises when you squeeze and let go of the lever when running idling ?
  • In regards to sixth gear, can you shift each gear like you normally would until you hit 6th or does it jump back to 5th gear etc  (gearbox issue than clutch)
  • Look at your front sprocket  (check for rattle or loose nut)
  • Chain tension does affect how smooth your gears shift believe me.
  • Also grease up the linkages for the foot pedal shifter assembly that’s going to the engine arm/hook.
  • Confirm it is a GV125 Carb model (GV125C)  or   GV125S EFi injected  (because you put S in your topic but profile says C)