Yup, I have had this problem Firstly make sure you have Redline MTL oil in your box, you can tell cos its red Secondly renew the saddle, which the gear stick fork sits on Lastly and the thing that sorted my box out was a new short shift stick which i bought from : https://www.tigerracing.com/shop/gearbox-parts/126-gear-stick-quick-shift-modified-to-length.html They will cut it to length for you