Question about 2005 Yamaha YZF 600 R thunder cat

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Crank no start yzf 600r

Cleaned the carbs now will not start? cranks great getting spark getting fuel. any suggestions

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Inject some carb cleaner spray through the opened air filter while cranking.
Spark plugs work? timing on the camshafts ok?
Crank it without turning the throttle on.
Pull the choke cable if you need to.
It should fire up without throttle.
Use the carb cleaner spray to help it (don't spray too much.It will backfire from the carbs).

Posted on Jun 15, 2009

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Posted on Jan 02, 2017

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Hi, Ktatejr86 and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
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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.
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03 Yamaha YZF 600R wont stay running
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A 'cranks but doesn't start" problem just needs to be narrowed down to compression,fuel,or ignition.The compression is pretty obvious-does it sound like the stater is getting a load when cranking?The next one is fuel-do you smell raw gas fumes coming out of the exhaust?The last one is spark-take the plug out and clamp it to the block,crank it,do you see a spark? If you have compression and spark,try a shot of starter fluid down the carb.(sometimes the float needle can get stuck,and just getting the engine to fire will shake it loose).If you don't have spark,then look for why(not sure if you have a magneto or ignition coil system).

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Most likely fuel "Air" problem.
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Would suggest cleaning the carb and filters.
Then replace with good fuel mixture and start again. :)
Make sure the choke is set correctly and the air filters are clean.
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