Howdy all again,
I have a 2015 CVO RGU that I just did a 117" kit on. Of course things didn't go quite like I had hoped so I am now going to be doing some extra work to it.
This kit comes with a SE259e cam as part of the kit. Why HD offers this kit with this cam is beyond most since the kit has a CR of 9.9:1 and this cam likes a CR of 10.5:1 or higher.
So to fix this during the winter I am going to pull the heads and jugs off and am taking them over to HD Performance in Edgewood, WA to have the heads P&P and the jugs trimmed to bump my CR up to around 10.8:1.
So my questions are while I have the top end torn down is there anything else I want to do to it? Things like Roller Rockers? Or Forged Rocker Supports? I'm also getting new valve springs installed to get rid of the stiff stock CVO springs. I'll most likely also replace the SE lifters with someone else's while I have things apart.
So let's hear it? What else would you do?
I would do to the heads what Don at HD Street performance recommends. With the right compression the 259E is a good cam.
First time I built my 13 CVO King January of 13 Don did my head work, and we set the compression for 10.8:1. Ran the 259 E cam with a HPI 55mm throttle body and 5.3 GPM injectors. Woods alpha lifters. Fullsac head pipe and fullsac 2.25 mufflers in the stock CVO cans. I was 123 HP and 124 torque. Very nice torque curve with no dip or flat spot, easier to ride then stock. Used a TTS tuner
Fast forward two years when HD came out with the 117 Kit, I bought the Cylinders only. Worked with Don on Cam choice an compression for this, knowing I was going to run the same HPI throttle body, and same exhaust. Don said they way he did the heads the first time they would be fine. So I am at 11.4 compression with a Woods TW-9B-6 cam. I am at 138.5 HP and 140 Torque, very smooth and easy to ride, no flat spots. Easiest and smoothest bike I have ever rode, still have it an have had 4 CVO since.
When I build my 2019 M8 CVO, Don will be doing the head work, and I will be talking with him about choosing the right parts. Key is everything needs to be matched to work together for best results.