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Discussion Starter · #1 ·
Bringing in my cylinders to be bored out 10 thou. I want to know if i will need to rejet my carbs after this is done ?

Andrew
 

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ski--doo all the way said:
Bringing in my cylinders to be bored out 10 thou. I want to know if i will need to rejet my carbs after this is done ?

Andrew
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Dont believe you need too. A piece of paper is 4 thou (.004) so .010 isnt all that big of a change. Should gain none or loose none.
 

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My Formula Z 500 is bored 25 thou with no jetting, runs fine.
 

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if you stay with a replacement for the existing pistons you should be ok.
if you change the compression or port timing you will want to check your plugs to be sure. you may want to get a reading anyway.
 

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Discussion Starter · #6 ·
when my engine goes back together i'm gonna look over every part to be sure everything is timed, aligned, ect. as for the RAVE valves do they need to be cut or are they still ok when boring out 10 thou

Andrew
 
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