cwill83247 Posted March 9, 2014 Report Share Posted March 9, 2014 I have a 2003 gas gas pro and just wondering if anyone can advise what jetting they run and needle position ? The carb is a dellorto phbl26 I have Main 120 Pilot 33 The clip on the needle is at the lowest point Cheers Chris Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted March 9, 2014 Report Share Posted March 9, 2014 whats wrong with the way it runs ,been that the clip is on the bottom it may need to go a size up on the main but it depends on how it is running not the way other bikes are running Quote Link to comment Share on other sites More sharing options...
cwill83247 Posted March 10, 2014 Author Report Share Posted March 10, 2014 Fair point .. it seems to run perfectly on choke .. Seems to pink when not on choke.. Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted March 10, 2014 Report Share Posted March 10, 2014 sounds like it does need to go up on the main if the filter is clean and oiled ,try a 130 with clip in the middle Quote Link to comment Share on other sites More sharing options...
richt Posted March 10, 2014 Report Share Posted March 10, 2014 (edited) This is cut & pasted from Trialspartsusa.com website CYLINDER SIZE 250 CARBURETOR PHBL26BS Main jet 118 Jet needle position D36-3ª Throttle valve 60 Slow jet 35 Spraying jet 270K Passage jet 200 Level of the floats 12.3 mm Fuel screw 2.5 turns out Edited March 11, 2014 by richt Quote Link to comment Share on other sites More sharing options...
copemech Posted March 11, 2014 Report Share Posted March 11, 2014 Go up on the pilot jet to 35-36 range and put needle clip up a notch. Leave the main jet alone! Quote Link to comment Share on other sites More sharing options...
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