Diagnostics on a CRF450 that won’t start, summary of fuel and Carburetor operation and diagnostics скачать в хорошем качестве

Diagnostics on a CRF450 that won’t start, summary of fuel and Carburetor operation and diagnostics

It is common on older carbureted 4 strokes to have issues with starting and carburetor adjustment can be complicated. Although there are several issues causing your bike to not start, this video explains diagnosing your fuel delivery and carburetor operation. I explain jetting and the main components to setting you carburetor including jet needle placement, main jet, pilot jet and pilot screw setting along with idle and the fuel pump squirt to get your carburetor tuned right so it will run. If it still won’t start after adjusting the carb it is likely due to your valve conditions and adjustment in the head which will be covered in another video. Video by Jay Clark    • 4 Stroke Fuel Mixture Screw Adjustment