Question about 2004 Honda CRF 150 F
I have adjusted the valves cleaned and re-gaped the plugs cleaned air filter cleaned spark arrestor tried to adjust carb but nothing seems to work@
Hi, Smiley1961 and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
13. Multi carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
more help with the 150r please won stay running
Brand new CRF150 won stay running
CRF150F service manual repair 2003 2013 CRF150 Download Manuals Technical $15
Honda 2004 CRF150F Owner Manual
Posted on Oct 30, 2017
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Posted on Jan 02, 2017
SOURCE: Cleaning Carb Jets
not to a trained ear also go by rpm and spark plug color
NOTE: use copper wire to clean jets, sync is just thottles are same position as all carb's just leave them adjustments alone will be fine if are out use a 1/8 drill an place in between piston/butterfly to carb bore to sync/calibrate
better use a manometer for adjusting screws
depends on condition of org parts
worn = richer running
new = lean an clean
also if changed the exhaust system need to
re-calibrate carbs for max performance
Posted on May 09, 2009
The idle screw and the air screw on the outside throat of the carb must go back in the same locations they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. If they are tightened as a normal screw would be, they are ruined.
I don't get paid for my answers. I am only trying to help. I do take pride in them. So if you will, > > > > A “very helpful” rating for these answers? Thanks!
Posted on Jun 12, 2009
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