My 05 125 gasgas has got a leak in the same sort of area (seat area) it is from the allen screw which goes through the seat to fasten it on, it is to long when bought standered. Welding is the best way and then cut the allen screw down before putting it back in!!!!
Oko Carbs
in Gas Gas
Posted
OKO carbs are sold on todotrials website www.todotrial.com hope this helps