Question about 2002 Yamaha YZF 600 R thunder cat

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Bike runs rich, rough, idles and starts fine but dies when you hit the throttle. allways ran great untill i parked it for 3 weeks.

Has 91 octane full of fuel. Changed fuel filter and plugs after issue. No issues ever. 12k for miles. Well taken care of.

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  • Yamaha Master
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Hi, Sandmanaz 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.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
2000 yzf600r stalls when give it gas motorcycles
YZF600R Forums View topic 97 thundercat dies when given throttle
Yamaha YZF600 YZF600R 1994 2007 Service Repair Manual PDF Download Manuals...
OEM parts for Yamaha
Yamaha YZF600RP Owner Manual

Posted on Aug 16, 2016

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 16 Answers

SOURCE: hard to start

hellow that is a R1 Not a honda civic it takestime for fuel pump to get going also ecu to work fuel injection to kick in

I Have A R1 2000 carb and i ride with a lot of guys these bikes just take 2-20 secs to start after that they run great your bike is fine leave it alone

Posted on Mar 14, 2009

cape cod bob
  • 292 Answers

SOURCE: engine dies after 20 minutes of running.

try some Berrymans B12 fuel additive in the tank. if your bike has been in storage it could be gummed up a bit. put in a little more than stated dose, no more than double, run it let it get hot and then let it stand overnight. it worked for me on my v star

Posted on Mar 31, 2009

  • 3567 Answers

SOURCE: 2002 VStar1100 balks under load

Sometimes it is hard to tell at low speeds if the fuel mix is too lean or if it is too rich. Simple to work at though. Let's say the mix is too lean. Remove the slide from the throat of the carb then move the clip on the jet needle down one notch. This richens the low end mix. Try it out. If it is better then try another notch. Choose which is best.

Now lets say the original mix is too rich. Remove the slide from the throat of the carb then move the clip on the jet needle up one notch from the original clip position. This leans the low end mix. Try it out. If it is better then try another notch. Choose which is best.

Pleas rate this solution. Thanks r_vietzke09!

Posted on Apr 22, 2009

  • 48 Answers

SOURCE: Fouled Fuel System on 2005 Yamaha V-Star 1100 Classic

put a new filter on it

Posted on May 26, 2009

  • 15 Answers

SOURCE: project bike. just got it running. runs fine with

Yes It Would Its A Higher Octane And Much More Clean, But You Should Get Your Fuel Line To See If It Has A Kink In It That Could Be The Problem As Well But Im Sure Its The Fuel

Posted on Jun 27, 2009

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