Question about Yamaha YZF-R1 Motorcycles

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Ok 02 r1 have fitted motor to a kart, have all the diagnostics etc you can put fuel down throttle bodies and will fire ,pump is pumping injectors releasing fuel but will not start or keep running

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  • hhh67 Sep 04, 2010

    thing with problem is it was running in the bike before i put it in the kart will check though
    thanks

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Hi! Have you checked the vacuum hoses? If you have a vacuum leak it won't start. Please secure the vacuum hoses and this may resolve the problem. Hope this helps and thank you for using FixYa!

Posted on Sep 04, 2010

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In that case the injectors aren't pumping nearly enough fuel. Check the fuel pressure and the status of the injectors - they might be clogged.

Posted on Sep 04, 2010

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Hi, Tom and the usual suspects are:
1. Fuel tank empty.
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.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
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10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
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 CDI box.
Spark plug cables in bad condition and shorting check for leakage in the dark, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty MAP, CKP, O2, TPS, sensors.
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box.
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18. Check for engine trouble codes.
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.
http://www.r1-forum.com/forums/103-02-03-r1-mechanical-help/318333-02-03-r1-cranks-strong-but-wont-start.html
http://www.r6messagenet.com/forums/r6-maintenance-technical/26969-bike-turning-over-but-not-starting.html
1998 1999 Yamaha YZF R1 Service Manual R1 Moto Data Project
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

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