Starting a cold yz450f by hand



9 replies to this topic
  • Rettich333

Posted May 27, 2015 - 09:40 AM

#1

I made this Video yesterday at around 12°C in Germany

 

 

 

 

what do you think ? quite normal for Yamaha


Edited by Rettich333, May 27, 2015 - 09:54 AM.


  • grayracer513

Posted May 27, 2015 - 09:49 AM

#2

Due to the automatic compression release, and maybe a bit of wear, it's quite possible.  Also an excellent way to end up wearing a cast on your wrist for 6 weeks. 

 

Mine has started before while I was just rolling the engine over for priming or positioning the crank. 



  • cpetz24

Posted May 27, 2015 - 10:06 AM

#3

Yeah, not a good idea, even if you can.  I did this one time on an XR80.  99% of the time I could just roll it over by hand and it would start.  I mean, it was an 80 cc bike, right?  Did it all the time.  One day, I reached over to do this after an oil change, for what ever reason it kicked back, and as I pulled my hand back it was covered in blood.  Needless to say, I was missing my entire finger print on my ring finger.   

 

And that was the last time I did that.  I would never think of doing this on a 450.  Not a good idea.  



  • grayracer513

Posted May 27, 2015 - 10:23 AM

#4

You're taking something of a chance even starting them in street shoes.  My '03 was in a bad mood one day and came close to breaking my foot right through my Alpinestars.  They can be really fierce.



  • soulsedg3

Posted May 27, 2015 - 01:20 PM

#5

You're taking something of a chance even starting them in street shoes.  My '03 was in a bad mood one day and came close to breaking my foot right through my Alpinestars.  They can be really fierce.

 

LOL. i can vouch for this.   it hurts like a mofo when it kicks....



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  • 03yzf450-kuke

Posted May 27, 2015 - 03:13 PM

#6

I dont understand why you would want to start it with your hand unless your foot was broken in which case you prolly shouldnt be riding

  • grayracer513

Posted May 28, 2015 - 06:23 AM

#7

Focus.  He's bringing up the fact that he can start it by hand as a possible indication that there's something wrong with it.  The compression might be a little low, but it obviously runs pretty well or it wouldn't be possible.



  • Rettich333

Posted May 28, 2015 - 06:56 AM

#8

checked the compression last weekend.   187 psi is quite good i think.

of course checked compression kicking by food  :thumbsup:



  • KTMfinrider

Posted May 28, 2015 - 12:17 PM

#9

checked the compression last weekend. 187 psi is quite good i think.
of course checked compression kicking by food :thumbsup:


So first you fire her up with bare hand and next time with food. What did you use, sausage perhaps?

  • 03yzf450-kuke

Posted May 28, 2015 - 02:03 PM

#10

Prolly nothin wrong dude auto decomp is a beautiful thing





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