Hard Start for yz450f


8 replies to this topic
  • Bambam7689

Posted June 16, 2011 - 03:28 AM

#1

hey guys i was wondering. is your bike harder to start when its already warmed up and you've been riding.. my bike will start right up cold but if ive been running it i have to let it cool down and try again.

  • grayracer513

Posted June 16, 2011 - 06:57 AM

#2

They can be. Are you using the hot start lever.

  • Bambam7689

Posted June 17, 2011 - 06:32 AM

#3

is that the lever right under the left handle bar?

  • grayracer513

Posted June 17, 2011 - 06:58 AM

#4

On stock levers, it's on top of the clutch perch. On a lot of aftermarket stuff, it's under it. The hot start bleeds air into the intake to lean out the engine for restarting hot. Hold the lever and crank w/no throttle a time or two. Should help.

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  • KJK_JR

Posted June 17, 2011 - 07:26 AM

#5

Mines usually 1-3 kicks when hot.

  • blakers213

Posted June 17, 2011 - 10:01 AM

#6

Mine starts easy all the time. I am always amazed because I know 4 strokes are supposed to be hard to start when hot.

  • Yamiryder

Posted June 18, 2011 - 12:40 PM

#7

Some bikes seem to like a couple twists of the throttle before you start them. I know mine does.

  • RiderX

Posted June 18, 2011 - 12:56 PM

#8

Some bikes seem to like a couple twists of the throttle before you start them. I know mine does.


Mine does when the bike is cold-as in not run in a while. When the bike is hot, if you're having to prime the cylinder by squirting fuel in it (twisting the throttle) you're probably running lean.

  • Schpenxel

Posted June 18, 2011 - 02:08 PM

#9

Mine starts easy all the time. I am always amazed because I know 4 strokes are supposed to be hard to start when hot.


Same here.. 2 kicks max. (although I'm sure it won't start for the first time now that I've said that)

I was going to get an auto decompression cam after all of the horror stories but not sure I'm going to bother now. I can start it usually first kick now anyways and have the decompression step down to very little time.





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