Covid Brain Dingers

[gumby302ho]

  Why does every motorcycle I have ever had always has a loose shifter, its like half the spline is doing its job and if you screw with them like a little more tightening or worse the shifter shifts like shit! And if your FJ or Vmax or FZ and the like jumps out of second gear could you not hold your foot on the shifter keeping it still up when shifting into 2nd gear would it not want to jump out! .  F%#! covid 19.

[fj1289]

Don't think that will work - when the dogs get rounded off bad enough, the engine torque is then pushing the gears apart.  And the engine torque is being multiplied through the clutch drive reduction.   I'm thinking you'll break the shift fork before you could add enough force through the shift mechanism to keep the gears together...

[red]

Why does every motorcycle I have ever had always has a loose shifter, its like half the spline is doing its job and if you screw with them like a little more tightening or worse the shifter shifts like shit! And if your FJ or Vmax or FZ and the like jumps out of second gear could you not hold your foot on the shifter keeping it still up when shifting into 2nd gear would it not want to jump out! .  F%#! covid 19.

Gumby,

The cure for the FJ jumping out of gear will be undercut transmission gears.  RPM has them. 
You probably have somewhat bent shifter forks in there, as well.  Maintenance will be needed, but it's a known problem.

[red]

Gumby,

Quick shifting, clutchless shifting, and stomping the gearshift when the gears do not line up (instead of releasing the clutch lever for half a second) can all lead to damaged gear dogs and bent shifter forks.  One incomplete shift action can do the damage.  Just for future reference, of course.

[ribbert]

Don't think that will work - when the dogs get rounded off bad enough, the engine torque is then pushing the gears apart.  And the engine torque is being multiplied through the clutch drive reduction.   I'm thinking you'll break the shift fork before you could add enough force through the shift mechanism to keep the gears together...

As you say Chris, engine power is pushing the gears apart, but not all of it. Most of the power is still being transmitted through the gears, only a small amount is re directed to forcing them apart. It is only this tiny amount you need to arrest. In the early stages of gears jumping out, it doesn't take make force to keep them engaged but if left long enough, gets to a point where it is impossible to physically hold it in with the forces you describe at play, although in most cases no one will put up with it long enough for this to happen.

There is no band aid fix for an FJ jumping out of 2nd.

People of a certain age here will know all about holding cars in gear. 

Noel

[T Legg]

People of a certain age here will know all about holding cars in gear. 

Noel






[/quote] especially those of us who are off road drivers and didn't want to go back down to the bottom of the hill in reverse.