Wanted:The easy clutch pull of the 2008 yzf450


5 replies to this topic
  • adaguy

Posted October 07, 2008 - 11:57 AM

#1

Hello fellow yz-ers
I have a 2006 yz 450 witch is almost perfect, except for one thing,…. the clutch pull…. I am very envious of the clutch pull that the 2008 yz450 has, on that bike it seems if you go over 40mph the wind would push the clutch lever in for you.
I remember gray racer commenting on what it would take to get the same clutch pull as a 2008 but the search did not give me what I wanted. So my question, what is different between the years and is it a logical conversion and what have you guys done to get the pull of the 2008
I have a maguara hydraulic on it now and its still a long way away from the desired “like butta ”.
Please be specific in your solutions and I thank you in advance for your comments and answers
Dan

  • grayracer513

Posted October 07, 2008 - 12:38 PM

#2

Being old, and the owner of an '06, I see no reason for a lighter clutch pull.

To achieve it anyway, use the following parts from an '08:

1 Pressure plate 2S2-16351-00-00

6 Springs 90501-230E4-00

7 Plain plates 4X7-16325-00-00

1 Push lever (release arm) 2S2-16380-10-00

Leave one friction plate out when making the assembly. The clutch will be roughly 11% weaker because of the loss of the one plate, but the removal of the plate is necessary when using the increased leverage and reduced lift of the '08 release arm. The pressure plate and springs are needed to make up for the shorter stack.

  • adaguy

Posted October 07, 2008 - 01:25 PM

#3

Thanks Grey,
So for about $140 dollars and my labor I can get rid of the itch to buy a 2009.
And come to think of it with the 2009 I would of wanted to put in the 06 camshafts and replace exhaust.
So using simple math I am way ahead by upgrading my clutch.
Thanks again

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  • adaguy

Posted October 07, 2008 - 01:34 PM

#4

One more question Grey
I noticed the primary gear/basket is a different part number. is the 2008 basket more shallow due to fewer plates? and if i was to order an aftermarket basket would it be wise to order for a 2008 and would it fit properly

  • grayracer513

Posted October 07, 2008 - 03:35 PM

#5

The driven gear assembly is different because the gear itself was changed in order to reduce backlash and noise. It matters not to the clutch itself.

  • erickdj

Posted October 07, 2008 - 03:37 PM

#6

Thanks Grey,
So for about $140 dollars and my labor I can get rid of the itch to buy a 2009.
And come to think of it with the 2009 I would of wanted to put in the 06 camshafts and replace exhaust.
So using simple math I am way ahead by upgrading my clutch.
Thanks again


Smart man. I have an 08 that I bought last December, but if I had owned an 06 or 07 there wouldn't have been any need to upgrade to 08 or 09. Seems to me like the 06-09 haven't changed "significantly" to make the upgrade a smart move. I know they HAVE changed, just not that much in my opinion. My 08 keeps me very happy and I doubt I'll upgrade any time soon. Because of the green/red sticker BS in California I've only used it about six times since I bought it last December, so I guess it's still within the break-in process...:lame:





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