The gear lever on my sons Sherco ST 125 (2015) does not return to the central position when he changes gear. I checked the gear return spring but it is not broken. Do these springs become weak so become ineffective. Would it be an idea to change the spring while I have the clutch casing removed. If the problem is not the what else could it be.

thanks

Do you think the selector shaft is bent?or maybe the weld is damaged at the end of the shaft?

Do you mean the shaft the gear lever is attached to. If so, it seems ok.

Yes that's the bit.what about a picture or a video to show us what's going on!

Change the spring, they weaken then crack.

 The only way to check the shaft is to remove it. Also the pins on the drum the selector connects too can break.

Pins on the drum are ok and he shaft is straight. I'll change the selector spring and see if that solves the problem. Thanks for all the replies.