Question about 2005 Honda CRF 70 F
Will idle but when given gas, it shuts off
Posted by Anonymous on
Hi, Anonymous and the usual suspects are:
1. Idle port, transfer ports, slow air jet clogged.
2. Idle adjusting screw set too low.
3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
9. Fuel line to carburetor kinked or pinched.
10. Fuel filter clogged.
11. Intake manifold leak.
12. The gas cap is not venting properly or fuel tank venting system blocked.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
15. Multi carburetors not in sync.
16. Faulty fuel pump.
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HELP 50 idles fine dies when give it throttle
How To Carburetor Idle Pilot Screw Adjustment Honda XR70
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HONDA CRF70F Owner Manual
Posted on Oct 09, 2017
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Posted on Jan 02, 2017
SOURCE: Crf 450 front preload adjustment
Hi ...... Any preload and/or damping will be adjustable from the top of the forks (even upside down forks). Anti-clockwise to reduce, clockwise to increase. You may find that a previous owner has increased the 'weight' of fork oil as a cheap/easy alternative to adjustment or aftermarket linear or progressive springs.
Posted on Dec 29, 2008
You sound like you have a blocked idle jet in the carb. Honda trail bikes love new oil, clean air cleaners and clean fuel. After a while a build up of tannins and crusty residue will invade the carby bowl and usually migrate through the carb via the jets and the emulsion tube where the jet needle runs. The easiest way to fix your problem is to remove the carb and go through it. Clean all jets and check float height and generally get it back to scratch. You will have to re- adjust your idle and mixture settings after you have fited it back to the bike. If you are not Mechanicaly savi then I would suggest you take the bike in to your local honda dealer and get them to go through the carb for you.. It's not a big problem and is easlily fixed.
Hope this helps...
Posted on Apr 28, 2009
Sounds like a lean condition. Spark plug should be a tan brown.
I would say the carb probably wasn't drained prior to storage and your main jet is gummed up. Gas deteriorates very quickly especially in vented containers like the float bowl of a carb.
clean your carb for sure.
Posted on May 20, 2009
The axel has a nut on one end and two bolts or one pinching the shaft on the other. Jack the wheel off the grond unscrew the nut loosen the pinch blots pull out the axel and the wheel falls out Watch wher the spacers go as they have to go back turned the right way. the brake rotor has to be lined up with the caliper to put it back in as you don't push the brake with the wheel off as the pads will have tobe pried open to get the rotor back in. Tring to fix a flat? same as a bicycle except use soapy water don't forget to use water to cheak for leaks then put on the powder on the tube before it all goes back good tire irons come from bike dealers and bike parts suppliers. Screw drivers cause more troble than thier worth. Road going bikes chage the tube patches are Illegal DOT
Posted on Aug 15, 2009
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