Hell yeah, I would love to have some superior flowing heads!

Do it

 

installed a 200 rear tire late fall and had to have my brother repaint my right bag. guy on another bike ran into me at stop light. just got bag back.

 

Hooking up much better or can't really tell yet w/ the 200? What brand you go with?

Wow that's sucks someone ran into your bag! Could have been MUCH worse man. At least you have a quality paint, right hand, paint guy. How's the other guy when you saw it happen, ha?

 

Metzeler 880 its a V rated tire grabs and hold the road better than the 180 did.it was a guy that rides with us once in a while.paint and materials $250.00 not including any labor. waiting to see if he will make a offer to pay for the repairs.also painted trim pieces on the battery box same color as bike while I had extra paint.

 

Good to hear the 200 is working out for yah. If he's a stand up guy he'll offer some cash, especially since it was his fault. Good luck with that one.

 

As far as I know the 103 heads are the same as the 96ers except that the they are machined for automatic compression releases. I suspect that you'd be better off with the stock heads.. Maybe add manual compression releases. You really need to figure out whether you plan to go with a 103 or 107.. With flattop pistons the 107 compression will be too high for 48s as it will be about 10.5 to 1. You's be better off with a later intake close like a 54.. Nothing wrong with the 96 ci valve springs they are the same as the 103s.

 

I think you meant later intake close like a 45 degrees not 54 degrees??

 

Sorry for not being clear.. I was saying Andrews 54 cam which has a 42 degree intake close.. A little aggressive on the CCP for a 107 but yields a nice flat power band.. Setting the CR to 10.2 to 10.5 (aggressive side) on a 107 is pretty easy... A typical 103 with stock chambers can yield about 9.9 to 10.1 to 1 CR. Assuming 84 to 86 cc chambers.

 

Use the stock heads and have a stage 4 head work done.
You can save some $$$ to have the stage 4 head work done.
Big difference between the stage 3 and stage 4 head work.
I wouldn't consider anything below a stage 3.
The heads and cams is the heart of any good build.

 

Just Curious... What is Stage 4 work other than it probably costs more than stage 3?