new piston


4 replies to this topic
  • rocky1980

Posted October 06, 2014 - 01:26 AM

#1

hi guys i have a 2003 yz450f due to a little smoke i have just got a new pro x h/c piston kit and i have sent the barrel of for re-plate, whats the best approach to breaking in the new piston? i have seen a few different ways online and I'm unsure which one.

 

1: yamaha manual way

2: take it steady

3: ride it like a mad man

 

 



  • mdsharon

Posted October 06, 2014 - 12:04 PM

#2

hi guys i have a 2003 yz450f due to a little smoke i have just got a new pro x h/c piston kit and i have sent the barrel of for re-plate, whats the best approach to breaking in the new piston? i have seen a few different ways online and I'm unsure which one.

 

1: yamaha manual way

2: take it steady

3: ride it like a mad man

Heat cycle it a few times, ride it like you stole  it!!!  lol



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  • rocky1980

Posted October 06, 2014 - 01:27 PM

#3

Heat cycle it a few times, ride it like you stole  it!!!  lol

heat cycle whats the procedure? just double checking before i bugger it lol



  • grayracer513

Posted October 06, 2014 - 02:11 PM

#4

Start the engine and run it for a minute.  Shut it off, check everything over.

 

Start it up and ride it easy for 4-5 minutes while it warms up, then take it for a 10 minute romp at around 50-60% of it's capacity.  Don't lug it, don't rev it out.  Park it, check things over again, take a 10 minute break.

 

Fire it up again and spend 15-20 minutes at around 80% of its capacity.  Take another 10 minute break. 

 

Break-in is now over.  Change the oil after the first hour.



  • rocky1980

Posted October 07, 2014 - 01:22 AM

#5

brilliant will give it a go thanks







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