450 vs 426 cam teeth question

2 replies to this topic
  • milk

Posted June 10, 2010 - 10:09 PM


sorry for the confusing title but not too sure how else to word it. anyway my situation is this. i'm swapping my stock 426 exhaust cam for a 450 exhaust cam with the auto decompression. everything is going ok so far. problem(if it is a problem) is this. when i compared the 450 cam to the stock 426 cam the teeth on the brand new(fresh out of the box oem genuine yamaha cam) 450 cam are a bit fatter/wider. is this normal? it rides the chain fine and the teeth aren't taller or anything. just a little fatter. the spacing and tooth count is the same so in other words it's the same exact size other than the teeth being a bit fatter. am i worrying about nothing and this is normal? is it because my 426 cams may just be a bit more worn compared to the new one? thanks in advance.

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  • grayracer513

Posted June 11, 2010 - 05:36 AM


This difference in tooth profile that you notice was one of the things people were concerned about early on when the swap was originally conceived. You'll find lots of commentary on it in the DCM Thread:


In 7 years, no one has had a problem with this.

  • milk

Posted June 11, 2010 - 07:04 AM


ah, i see now. thank you for pointing that out gray :thumbsup:

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