Hello, I have a question about the interchangeability on the Cams and rocker arms of the S40 engine between 1988 & 2003.

I have an old 88-89 Savage that i need to replace the rocker arms and Cam on. However, I want to get just a little more power out of the engine for our mountainous interstate roads around Denver Colorado. a stretch of I-70 known as Floyd Hill has been designated as one of the most dangerous stretches of road in the US with a 6% grade. So, i want to be able to do the designated speeds without the bike bogging down and slowing to 45mph fully throttled. In other-words, I'd like to stay alive without being ran off the road by 18 wheelers.

What I'm hoping to do is replace the cam with a stage 1 or 2 and get just a little more out of the mid to high end without affecting the lower range for city intersections. I've been shopping around for parts and have discovered that I can no longer get parts for a 88-89. So now I'm looking at parts from 90-2003.

I know that in 93 suzuki added an extra gear to the gearbox, but I'm thinking the top-end stayed relatively the same. "Since there's no need to reinvent the wheel."

I'm looking for someone that has compared the different year cams regardless of the different part model numbers. Are the spec's and measurements' the same? Can I utilize a more modern year cam and rockers? I don't imagine there being too much of difference between years.

Thank you for the information Dave. For some reason i wasn't notified about your reply even with the box checked that states: "Check this if you wish to be notified of replies to this topic." So, I had to really look for my post to see if there were any replies.

I'm also new to the site so it may also be user error too.

So, could you please elaborate a little more on the oiling holes that need to be drilled? Also, my bike is an 86 Ls650-H according to the VIN and not an 88 like I had previously thought. Will that change any of the above recommendations?

DragBikeMike is our expert on engine mods, and in the Technical Section there is a lot of information on engine upgrades.

Lancer is our source for Performance Cam grinds.

Here is the DR650 cam thread.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1525327311

Here is the Link to DragBikeMikes threads:
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1615569533