Legum manual stuck in fifth gear - Galant Mitsubishi Cars & Trucks

Sit in the vehicle .Get someone to move it back and forth while in 5th gear ,try to disengage the gear either through the clutch or by pushing the gear lever to neutral .

If you have the five speed manual, almost certainly the fifth gear is an overdrive gear. Overdrive means that the gear ratio is less than 1:1, and in most 5 speeds, the fourth gear is 1:1, the fifth gear being less, such as 0.85:1 for instance. So yes, you probably have overdrive, it's just not called that in a standard transmission.

Sounds internal to me. Fifth gear bearing locked up. I assume it is manual(unless the bearing has welded itself to the shaft and case)? These aren't hard to rebuild. Automatics are a bit trickier. Either of them have to come out.

I would check to see if the fluid is low, and replace it with Honda manual transmission fluid first. Honda manual transmissions originally used engine oil, never gear oil, then Honda came out with manual trans fluid. Either would work, but the Honda manual fluid would be better.

bettr git the bike to a trans specialist for a testdrive--it may need rebuild or the clutch mech has issues

You might have bent the shift linkage that is beside the transmission.

this is caused by severe transmission wear, you are going to need the trans torn down and rebuilt, sorry but that is the only way to fix this right.

Sounds like the syncranizer is bad

You should have fifth gear. There is no fifth gear lock out. Most likely it's not going into fifth gear, due to play in the shifter, or play in the linkages.