Contact direct to our workshop and explain your problem to our mechanic Kev Hipwell on kev@johnshirtmotorcycles.com. Please be patient for an answer as he is a busy guy.
Try Jon Stoodleys Technical pages at Gas Gas USA website where you’ll find most problems covered!!
Also check out the awesome website which covers a lot of GAS GAS questions. The guys name is Jim Snell and he is the USA importer for GG spares etc. www.trialspartsusa.com/tech.html
Click below for a very handy link to the GASGAS FACTORY website which shows all the manuals and exploded parts books for all models;