1995-2000 Honda FourTrax 300 300FW TRX300 TRX300FW TRX service manual., Page 58Get this manual
FUEL SYSTEM Remove !he compression &pring and dLaPhragmlVacuum
posterlospecI the vacuum poston lorwear, niCks, or 0Ihe' dama98Make SUre the poston moves up and dowt! freety in the
Push !he jet needle tloIder down and tum it counterclock wise 90 degrees wilh an mm socielThen removlI the needle hoIOOrjet needI! and wasle( hom the diaphragm! vlICuum piston