I have an 04 280 pro that has the following problems:

Sometimes difficult to start, if i am lucky on 2nd kick

Just off idle speed engine runs erratically (especially when on slow sections), but fine when throttle opens fully.

These problems have been like it since new but i am now getting annoyed by them.

Carb has been cleaned and all jets checked and blown through with air line. Gone through various settings on tickover/air screw/needle but none appear to change things. New plug fitted. Air filter cleaned etc.

Any one else had similiar problems and how did you solve them.

Thank you

i have the same problem on my 01 txt 280,low revs are really slow to to return to tick over and also bogs a little when you go to accelerate after returning to tick over from usual revs,ny help would be great.heers

next time your out on your bike rev it at full throttle for 1-2 seconds or until you hear it at full revs this may help to clear the engine out just my thoughts

Spoke to gas gas today, they say it sounds like it is running rich and to try a smaller jet. Failing that to try another cdi unit and carb from another bike to try and isolate the problem, any offers? Will post if I get a result