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Craigop

2001 Gas gas txt 280 not running properly once under load

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Hi my gas gas is running fine revs up well. But when going up hill and get to high end revs it's starts spluttering. Any ideas? 

Thanks 

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Check the fuel vent from the filler cap,

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May be that the carb has been fiddled with as its a fairly old 2001 bike, main jet may be too big. There are possibly many reasons but its a starting point. Maybe ensure that the air filter is clear, clean and not restricted, hoses not kinked or crushed.

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If your bike has the standard DellOrto PHBH 26, they were always set up running rich on the main jet, from memory this was 118 with a 30 pilot jet. By spluttering do you mean it is running rich? If so, then change the main jet to a 115 or 112 if not used on the road. I imagine that you have cleaned the air filter. Bye, Peter B.

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