Hi everyone, Ive got a Jinmah 254 which my nephew managed to knock a tooth of 3rd gear or at least I think that痴 what happened as it makes a terrible clunking sound when in that gear and in any range medium or low. I want to pull the gearbox down myself and have a look at it so any advice at all would be appreciated. Also does anyone no how I could get a ser ice manual for it. Thanks in advance