I like the woods cams if that is the cam you want get it if you ask on here you will get alot of different opinions no matter what cam you choose it is better than stock

 

I agree 204 would be my choice also

 

I love it when people recommend a brand of cams instead of a grind. LOL.

The 37 is a good cam for your bike IMHO.

 

What, you mean you don't think the cams themselves know what brand they are?

 

I've always been a fan of a relativly short duration camshaft, but high lift. (Yes, that means Wood's cams or any others that meet the criteria) I'd look real close at the Wood TW-5-6....I wish I would have gone with it instead of the TW-555. The TW-5-6 will work well with the compression your 103 has and should be a real stump puller once you get it tuned properly!
You can view the specs of the Wood cams here:

http://www.fuelmotousa.com/cams.htm

The SE 204 is a good choice as far as duration is concerned, but with it's lift of (only) .508 it falls a little short (no pun intended) for my tastes. I'd shoot for something in the .550-.575 range, nothing over .575 or you're looking at the purchase of new valve springs.

 

wait for it...........

 

se 255!

 

Ha Ha, you were right!!

 

I think I am going to puke.

 

From what I've seen the .575 value isn't set in stone. Some cams have very quick jerk/acceleration rates and really should have better springs installed even if they don't exceed .575. Crane says to change springs with their .575 lift cam, while Redshift/Zippers says their .577 is good with stock springs. Roller lifters don't take kindly to valve float.

I personally wouldn't risk anything close as none of the cam companies are going to eat the cost of a blown motor due to a dropped valve after a spring broke, even if they said it was going to be okay with stock valvesprings.

I'm going to do 204's + 1.72 rockers for my stock 103, unless major scope creep kicks in before buying the parts.