Question about 2004 Yamaha YZ 250 F

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How many kicks should it take to start a 2003 yamaha yz450f?

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Open fuel tap and leave for 30secs
pull choke to on.
blip throttle once
kick over with no throttle (hold on front brake to make sure no throttle)
should start every time

Posted on Nov 17, 2011

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One, That thing should fire up in a second, if not, you got to get it so it will. Try not touching the gas, just pull on the choke, and give it a try. If that doesn't do it, try something else next time. I had a KLR 250, kick only, and that thing would start first kick every time, no matter what. I loved that little bike. Hope this helps.

Posted on May 13, 2010

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Posted on Jan 02, 2017

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SOURCE: what are the Valve clearances for a 2004 yamaha yz450f

Valve clearance (cold):

Intake:
0.10 ~ 0.15 mm (0.0039 ~ 0.0059 in.)

Exhaust:
0.20 ~ 0.25 mm (0.0079 ~ 0.0098 in.)

Posted on Feb 16, 2010

tunde007
  • 2382 Answers

SOURCE: My 2004 yamaha yz450f

Hi, fouled spark plugs will make starting a cold engine difficult and cause backfiring. Carbs not working properly will foul spark plugs. Install new spark plugs. Remove the spark plug and inspect it for evidence of fouling. I would clean the air filter 1st. Then I would put in a new plug....

Posted on Jan 01, 2011

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