Wr450f Crank And Piston

1106 Views 7 Replies 5 Participants Last post by stuff105, Mar 18, 2009

04 yfz

Discussion Starter · Mar 17, 2009

hi i am putting in a wr450f crank and dont know what year wr piston to order for it, 03 to 04 or the newer year one because i ordered a JE 03 to 04 piston and it looks wrong it is domed up insted of inward i can post pics if needed

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04 yfz

Discussion Starter · #2 · Mar 17, 2009

here are pics of the new piston that is supposed to be 13.5:1 compression and the old one that was 13.5:1 compression. so im pretty sure that they sent me the wrong compression, let me know what you think.

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supraomega

· #3 · Mar 18, 2009

Different brand = Different design, if the other piston you put in was for an 03 to 04 than you should be fine.

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soyo

· #4 · Mar 18, 2009

thats why i dont like wiseco, compared to a stock piston the wiseco is dished more. the je piston is probly a more true 13.5:1 piston. i would run it.

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