08 YZ 450 kickstarter "hanging" up?


30 replies to this topic
  • grayracer513

Posted February 05, 2016 - 07:08 AM

#21

Don't need it.  It's just something else to do wrong or forget about and cause more trouble.  The stock one works fine. 



  • Monkeybutt2000

Posted February 07, 2016 - 05:35 AM

#22

OK good to know,just curious if the automatics had issues after they got older. Hopefully get the carb back on today and see if it will fire.



  • Treeyz450

Posted February 07, 2016 - 07:03 AM

#23

I had an issue similar to this, and it ended up being the con rod main bearing. It would shut off instantly, not like you hit the kill button, an instant shut down. I even tore the engine completely down ad the crank play was within spec, but after the third time it locked up, I tore it down again to find out that the bearing was shot and must have been on its last leg the first time I checked.

Good luck!

  • Monkeybutt2000

Posted February 07, 2016 - 01:36 PM

#24

Well,the crank turns fine with a socket on the crank snout. I guess I won't know anything until I get it running. Been trying to get the float set,what a pain in the butt.



  • Treeyz450

Posted February 07, 2016 - 05:50 PM

#25

Well,the crank turns fine with a socket on the crank snout. I guess I won't know anything until I get it running. Been trying to get the float set,what a pain in the butt.


Yeah, mine seemed fine too. It would just lock up out of nowhere......

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  • Monkeybutt2000

Posted February 08, 2016 - 03:24 PM

#26

Yeah, mine seemed fine too. It would just lock up out of nowhere......

Bleh, all I can do is hope.



  • Treeyz450

Posted February 08, 2016 - 03:58 PM

#27

Bleh, all I can do is hope.

Good luck man!
Hopefully it is a cheap fix.

I dropped/bent 3 valves on my 450 this weekend! Now I need the head repaired, new valvetrain and maybe new cam(s), cylinder replating, and new piston and rings.

  • Monkeybutt2000

Posted February 09, 2016 - 03:21 PM

#28

Good luck man!
Hopefully it is a cheap fix.

I dropped/bent 3 valves on my 450 this weekend! Now I need the head repaired, new valvetrain and maybe new cam(s), cylinder replating, and new piston and rings.

 

 

Ouch! Might as well get the GYTR ported head for $1300. I'm throwing a new cam chain on and crossing my fingers.



  • Treeyz450

Posted February 09, 2016 - 05:33 PM

#29

Ouch! Might as well get the GYTR ported head for $1300. I'm throwing a new cam chain on and crossing my fingers.


I thought about it, but I can get it fixed and ported for less than half of that.

  • grayracer513

Posted February 10, 2016 - 08:31 AM

#30

If you get a 5 valve head ported, be sure the person doing it verifiably knows what he's doing.  The area in the intake where the three ports diverge from the one is EXTREMELY critical to both how the intake flows AND to the way the air flows within the combustion chamber on exit from the ports, and it's a whole lot easier to take out 4 horsepower than it is to find 2 new ones if it's not done right.  



  • Treeyz450

Posted February 10, 2016 - 05:47 PM

#31

If you get a 5 valve head ported, be sure the person doing it verifiably knows what he's doing. The area in the intake where the three ports diverge from the one is EXTREMELY critical to both how the intake flows AND to the way the air flows within the combustion chamber on exit from the ports, and it's a whole lot easier to take out 4 horsepower than it is to find 2 new ones if it's not done right.


I think I'm going to have edco do it like you suggested





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