Troubleshooting > Failures par brand > FOSTI > FOSTI F51 > Your FOSTI F51 50 motorcycle has a problem when you shift gears?
Gearbox components, especially shift forks and sprockets wear out, causing noise and malfunctions. In the most severe cases, the box may jam or crack. Transmission failures are rare, but that doesn't mean you shouldn't worry about them. Improper use and lack of maintenance can cause serious damage.
Some problems of gearbox can be easily solved. Regularly check the adjustment of the lever clearance and the level ofoil in transmission. If the problem persists, you can try completely draining and changing the oil with the recommended viscosity.ar the manufacturer this is important. Take this opportunity to inspect theoil drained for debris or metal shavings.
at your gearbox stumbles on a gear: This problem is due to an oil level that is too low. Check your gearbox for leaks or a loose screw.
â†' A gear skips: Open your gearbox to see the problem. Check them out locking springs, the selection mechanism and the forks.
â†' Your box is making noise: Check your level ofoil, the bearings and the pinions.
â†' The gears do not shift: Check your clutch cable and the bearings.