I have been following this thread as I am interested in 110CVO heads as well (considering I have a CVO110).
Yesterday I had a very nice conversation with one of the vendors on this site regarding what I could do with my 110 to see improvements from head/cam work. I'm really trying to understand what is going to be worth [to me] doing and what I can expect to see in return for my investment. He indicated to me that head work could provide a nice performance increase along with the proper cam and tune.
At the same time, I've been told by several (including well respected companies that do this) that without a compression change there won't be much to gain. Additionally, there isn't much I can do to raise compression unless I change pistons.
With a '15 CVO 110 engine, having flat top pistons, what options are available? I know I can do a cometic .030 gasket and maybe take a small bit off the heads, but with the flat top's what can I expect for compression having made those two changes? Are there other options? Can the head chamber size be reduced? Does that even make sense?
Also, for you guys that do this for a living, can you explain exactly what "Porting" is and the benefit. Is it important to have the heads "CNC" machined or are there non-CNC methods that are just as good?
MCE, if you are reading this - I saw a very nice dyno on a 103 that you did with a 110 kit. The details of the 110 kit were not listed (or I didn't see them). Was this just a displacement change or were the pistons changed to high compression pistons as well. I'm trying to gauge if that 110 kit would be same as my 110 or a 110 with high compression pistons.
This whole thinking process started for me when I found out that I was receiving a new long block 110. I hoped I could do a cam (ie Tman 625PS, etc) and get a nice "bump". Then I started hearing the heads needed to be done to work properly with the cam. Finally I'm being told now that without compression, the heads and cams won't do much.
Not trying to build a drag bike. I ride two up on a 1000 lb scooter. I would love to see 120/120 or so and be happy as long as the torque is early. I rarely run over 5-5.5K RPM's. For the record - engine is basically stock except FM 2-1-2 stainless pipes, RC 4.5's (just ordered Fullsac 2.0's to replace the RC's), and TTS.
Any comments are greatly appreciated. I know there are some of you guys that really know this stuff and I don't want to re-invent the wheel or go through the expensive trial-toss-try again method.