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rocky1980

new piston

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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

 

 

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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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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

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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.

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