Interesting fact about Athena 480 kit

6 replies to this topic
  • yz480doinwork

Posted December 06, 2008 - 12:44 PM


I think Athena uses the same kit for the YZ's as they do the YFZ's. this is pretty interesting, i fount it on a ATV fourm and anyone that has/wants a Athena 480 kit should read this. It dosn't mean the kits are bad or anything its just something that needs to be considered. Seriouse damage could result if not considered:


  • jeffboyd47m

Posted December 06, 2008 - 05:53 PM


I think CP makes a different piston for the YZF than they do for the YFZ. I have almost 10hrs of hard riding on mine and I am running the Cometic gaskets too. Bike starts easy and runs strong with no problems. The piston is the 13.5-1 but is not the Venom model.

  • yz480doinwork

Posted December 07, 2008 - 10:36 AM


are the thicknesses of your gaskets different from the athena gaskets? maby the Athena YFZ kits are different from the YZ kits.

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  • Family Man

Posted December 07, 2008 - 07:19 PM


its the same engine according to my dealer...

  • yz480doinwork

Posted December 07, 2008 - 08:55 PM


yeah i knew that but im wondering if Athena make different hight cylenders from the quads to the bikes. i dont know why they would...the probably dont. maby that guys table was un leavle lol. i have no idea. i just threw this thread out there to see what people think

  • jeffboyd47m

Posted December 07, 2008 - 09:02 PM


I'm not sure about the thickness of the two different gaskets.
I did some checking on the CP pistons website. The 98mm piston for the YZF is a 13.5:1 and is part # M1051.
The 98mm piston for the YFZ is a 12.5:1 and 468cc for the 03-05 and is 12.75:1....478cc for the 06-08. The part# is M1009 on the quad. Also they both have different part #'s for the pins.
Also it says to bore and replate on the YFZ but on the YZF it says sleeve or cylinder.

  • yz480doinwork

Posted December 08, 2008 - 06:16 PM



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