Question about Honda CB 100 Motorcycles

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I just bought a used 70cc baja dirtbike for my son. when i would start it it wouldnt stay on for more than 10 seconds. so i took off the carburetor cleaned it nice and good now when i turn it on it is idling in high rpm's. i adjusted the idle adjuster many different ways from all the way in to all the way out. still doing the same thing.

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Hi!
On the carburetor, on top the cap that screws in with the accelerator cable there is an adjustment nut that gets dis-adjusted when you take the carb off. Screw the Idler Adjuster all the way in and and back up two full turns and a half, then adjust the accelerator cable until the Idle gets to the lowest point. If the engine dies, use the Idle Adjuster screw to keep it going.
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

Posted on Nov 11, 2010

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Posted on Jan 02, 2017

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2009 Baja DR70CC dirt bike won't start. Cleaned carb, new fuel, good spark, kill switch working, just won't fire. Not sure where to go from here.


Hi, Tim and the usual suspects are:
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2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
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11. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
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15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box if applicable.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
BAJA DR70 Questions
7 Things To Do When Your Dirt Bike Won Start
Dirt Rider Magazine
http://manuals.monsterscooterparts.com/recreational/Baja/DirtBikes/manual-baja-DR70-US-VIN-prefix-LUAH.pdf

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Hey Cody,
>>> DO NOT "BOIL" a carburetor... that is NOT HOW YOU CLEAN A MOTORCYCLE CARBURETOR!!!!!!!! That is an old school, RED - NECK, backyard, UNQUALIFIED way to ATTEMPT to clean a carburetor!!!!


Take the carburetor to a QUALIFIED PROFESSIONAL motorcycle mechanic and have him clean and set your carburetor!!!!

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