Question about 1994 Yamaha FZR 600

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Bike bogs out at mid range and will not accelerate

I have a 89 yamaha fzr 600, i,v done over 1000 miles of trouble free riding on it since i'v had it but its just started to bog out in mid range and wont accelerate, flat out on it is 80 at the mo ( private road ) ;-) i'v changed the plugs and coils thinking it was probably one of those but it hasnt helped, im wondering if it could be the fuel pump but before i go out buying yet another thing that dosent sort it out i'd like to no if anyone else has had the same happen to them????? cheers!!

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Measure with a voltmeter the charging circuit for normal operation (battery, regulator/rectifier and generator).

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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $9 you can download another one. 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.
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Hi, Anonymous and the usual suspects are:
1. Throttle cables misaligned or misrouted.
2. Damaged or restricted fuel tank venting system.
3. Inlet system air leak.
4. Vacuum piston malfunction.
5. Accelerator pump leaking or no output.
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6. Accelerator pump leaking or no output.
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8. Fuel level in bowl too low.
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Hi, Charlescr231 sorry you can't find the first and best tool you ever bought for your Yamaha despair, not for a mere $10 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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Oct 04, 2011 | 1995 Yamaha FZR 1000

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Hi, Jpassionisli the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
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6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
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10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. Gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
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16. Needle and seat stuck closed in the float bowl.
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Sep 02, 2011 | 1989 Yamaha FZR 600

1 Answer

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Hi, Kevin_wri799 and the usual suspects are:
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2. Inlet system air leak.
3. Leaking accelerator pump.
4. Loose low-speed jet.
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7. Enrichner valve/choke not seated or leaking.
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May 24, 2011 | 1990 Yamaha FZR 600

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