Magnumfox Posted June 2, 2020 Report Share Posted June 2, 2020 Hi all I'm new to trials bikes, I have bought what I believe to be a 1999 GasGas JTX 250, I would like to know is there any way to excatly identify what year or model it is as i would like to buy some parts and other bits and pieces in case of emergency, I would also like to be pointed in the direction of a service manual or owner's manual (electronic copy preferred) or even if I could get service information, Really enjoying trials riding (made the switch from circuit for now till things settle) Any help would be greatly appreciated Thanks ? Quote Link to comment Share on other sites More sharing options...
tshock250 Posted June 2, 2020 Report Share Posted June 2, 2020 Can you post a pic of the bike or frame number? Quote Link to comment Share on other sites More sharing options...
Magnumfox Posted June 2, 2020 Author Report Share Posted June 2, 2020 (edited) Edited June 2, 2020 by Magnumfox Quote Link to comment Share on other sites More sharing options...
Magnumfox Posted June 2, 2020 Author Report Share Posted June 2, 2020 Quote Link to comment Share on other sites More sharing options...
tshock250 Posted June 2, 2020 Report Share Posted June 2, 2020 (edited) It’s 1998 tx320 according to that. Looks like someones put a 250 barrel on it at some point. Edited June 2, 2020 by tshock250 Quote Link to comment Share on other sites More sharing options...
Magnumfox Posted June 2, 2020 Author Report Share Posted June 2, 2020 6 minutes ago, tshock250 said: It’s 1998 tx320 according to that. Looks like someones put a 250 barrel on it at some point. ok cool, thanks. Quote Link to comment Share on other sites More sharing options...
tshock250 Posted June 2, 2020 Report Share Posted June 2, 2020 (edited) It’s got an older rear mudguard from a 97 jtx & someone’s also painted the frame black. Should be chrome. Edited June 2, 2020 by tshock250 Quote Link to comment Share on other sites More sharing options...
Magnumfox Posted June 2, 2020 Author Report Share Posted June 2, 2020 (edited) 34 minutes ago, tshock250 said: It’s got an older rear mudguard from a 97 jtx & someone’s also painted the frame black. Should be chrome. ok slowly piecing the puzzle together, I really appricate your help, would you be reccomend what gear oil I should run Edited June 2, 2020 by Magnumfox Quote Link to comment Share on other sites More sharing options...
tshock250 Posted June 2, 2020 Report Share Posted June 2, 2020 My mistake, it is the correct rear mudguard. https://gasgas.com/en/previous-models?c=&y=1998 Quote Link to comment Share on other sites More sharing options...
Magnumfox Posted June 2, 2020 Author Report Share Posted June 2, 2020 40 minutes ago, tshock250 said: My mistake, it is the correct rear mudguard. https://gasgas.com/en/previous-models?c=&y=1998 there is a number on the back of the kick start case MO 1010011, if this helps identify the externals of the bottom end any further Thanks again Quote Link to comment Share on other sites More sharing options...
peterb Posted June 5, 2020 Report Share Posted June 5, 2020 Those older GG motors are fine running ATF rated to Dexron III in the gearbox, use 600ml as the fill quantity. The number on the clutch case is the p/n for the clutch case. Check to see that the gearbox oil is not milky looking, indicates water getting into there, usually from a worn water pump shaft/seal. Engine is well put together, reasonably solid, some parts getting hard to find now. Brake pads and linkage bearings are readily available. Bike is considered heavy by modern day standards but these ride well and tend to last ok. Bye, Peter B. Quote Link to comment Share on other sites More sharing options...
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