SuzukiSavage.com - Rocker Arm design change

MeLikeBike

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Rocker Arm design change
12/14/12 at 07:32:05

Hi all,
I ordered a new set of rocker arms because mine were worn. On the BikeBandit site that I'd ordered from, there were two different arm part numbers, and the online stores that know what year Savage I have (a 2003) recommended a specific pair, so I ordered them.

And of course they are different than what was in the bike. Anyone know if these are swappable parts? The bracing on the arms looks different, but the distances between the valve contacts measure the same.

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2003 Savage LS650, Dyna, 2/3 Spacer

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28889 L.A. California Gender:	Re: Rocker Arm design change Reply #1 - 12/14/12 at 08:20:46 Some info here would be appropriate... mfr, p/n, pic.
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MeLikeBike

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Re: Rocker Arm design change
Reply #2 - 12/15/12 at 07:31:07

Sure...I didn't have the info when I originally posted, and thought someone would be familiar enough to answer...but here goes.

See attached photos...they are Suzuki OEM parts, 12840-07F00 (intake) and 12850-07F00 (exhaust). I found these through my local bike shop's OEM part finder. http://partsfinder.onlinemicrofiche.com/bentleysmotorcycles/Suzuki_OEM/Suzuki...
The images in the microfiche match my bike's original ones. And those are the part numbers that match the labels on the new parts, which look different.

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IMAG0936.jpg

2003 Savage LS650, Dyna, 2/3 Spacer

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MeLikeBike Junior Member Offline Newbie, but Goodie Posts: 59 Monroeville, PA Gender:	Re: Rocker Arm design change Reply #3 - 12/15/12 at 07:31:41 and the other:
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MeLikeBike Junior Member Offline Newbie, but Goodie Posts: 59 Monroeville, PA Gender:	Re: Rocker Arm design change Reply #4 - 12/15/12 at 07:37:57 And here are the comparisons. Original on left, new on right.
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MeLikeBike Junior Member Offline Newbie, but Goodie Posts: 59 Monroeville, PA Gender:	Re: Rocker Arm design change Reply #5 - 12/15/12 at 07:38:21 Here's the exhaust (if you look at the pad on the cam follower, you can see what my problem is...nice .75mm carving of the pad by the cam.)
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MeLikeBike Junior Member Offline Newbie, but Goodie Posts: 59 Monroeville, PA Gender:	Re: Rocker Arm design change Reply #6 - 12/15/12 at 07:38:41 3
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MeLikeBike Junior Member Offline Newbie, but Goodie Posts: 59 Monroeville, PA Gender:	Re: Rocker Arm design change Reply #7 - 12/15/12 at 07:39:01 4
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28678 Tucson Az Gender:	Re: Rocker Arm design change Reply #8 - 12/15/12 at 08:53:16 Wonder if there's a weight difference?...
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28889 L.A. California Gender:	Re: Rocker Arm design change Reply #9 - 12/15/12 at 09:02:38 from your OP, I thought you were buying aftermarket parts. the part number is a generic number, rocker arm, design F00 and probably is used in several engines. some parts have gone from a bike specific part number "24B" to a generic number over the years as they try to cut costs.
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MeLikeBike

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Re: Rocker Arm design change
Reply #10 - 12/15/12 at 09:24:49

original exhaust arm 143g
new exhaust arm 158g

original intake arm 132g
new intake 143g

I doubt the pad wear is enough to make up the difference (especially with the tiny amount of wear on my original intake arm)

Some googling on the part number shows this:

http://www.powersportsplus.com/parts/detail/suzuki/SP-12840-37401.html

so the 37401 is superseded by the 07F00.

When it doubt, ask Google. This is backed up by

http://www.suzukisavage.lt/upl/file/manual/PDF07-ls650-parts-list.pdf

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paulmarshall

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Re: Rocker Arm design change
Reply #11 - 12/15/12 at 09:51:57

MeLikeBike wrote on 12/15/12 at 09:24:49:

original exhaust arm 143g
new exhaust arm 158g

original intake arm 132g
new intake 143g

I doubt the pad wear is enough to make up the difference (especially with the tiny amount of wear on my original intake arm)

Some googling on the part number shows this:

http://www.powersportsplus.com/parts/detail/suzuki/SP-12840-37401.html

so the 37401 is superseded by the 07F00.

When it doubt, ask Google. This is backed up by

http://www.suzukisavage.lt/upl/file/manual/PDF07-ls650-parts-list.pdf

http://www.powersportsplus.com/parts/detail/suzuki/SP-12840-37401.html
Whats the difference between a 1978 LS650F Cam Shaft Value and a 1987 LS650P Can Shaft Value?

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28678 Tucson Az Gender:	Re: Rocker Arm design change Reply #12 - 12/15/12 at 10:29:53 paulmarshall wrote on 12/15/12 at 09:51:57: Whats the difference between a 1978 LS650F Cam Shaft Value and a 1987 LS650P Can Shaft Value? 9?... ...
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ralfyguy Serious Thumper Offline Posts: 932	Re: Rocker Arm design change Reply #13 - 12/15/12 at 10:45:50 Looks like the new style is meatier and stiffer. It may also more resistant to thermal expansion. Perhaps this was changed in order to have less issues with valve gap adjustment.
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Cavi Mike

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Re: Rocker Arm design change
Reply #14 - 12/15/12 at 11:52:06

I'm guessing they revised it because one valve wasn't opening as far as the other due to the longer arm flexing. The new design looks like it allows both arms to flex equally. Obviously I'm just speculating but that is a substantial revision - new molds are not cheap and that required a completely new mold so there had to be a reason for it. Considering I've never heard of one of these breaking before - even from guys with high-lift cams -the only other reason to revise it would be flex.

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