Anyone???

 

I have had the chance to see 2 of those 4v heads in person. Unfortunately I didn't get to do any Testing with them. Here's my 2 cents on them. fit and finish is the same as you would see with their 2v heads. My biggest complaint with the head is that they didn't do a bearing cam and it maintains the use of the stock cam tower. Not are very limiting factors. As spiz5 has had happen to him with his 2v head can also happen with this 4v due to poor cam design. The nice thing about the kit the cam cover is a shower cover so this helps aid in the fight against scorched journals. The cam tower really hinders how aggressive you can get with cam grinds. I absolutely love 4v heads and in my testing through the years they have always made more power over the 2v counter parts but.... What most guys neglect to take into consideration is easy bolt on performance parts are slim to none for 4v applications plus rebuilds will cost you at least double over a 2v If not more cause now you have 4 valves, 4 retainers etc... With the 2v heads you can easily source pistons from other applications as a replacement piston or as a even bigger bore than offered. The 100 uses a 14mm wrist pin which drastically reduces piston section then throw 4v on top of that and it's next to never to find an off the shelf piston. Again I haven't tested this head only got to port 1 and assemble 1. But if I had to make a prediction I would say it would yield 1-2 hp over the 2v counter part and would be very similar/close to a +R of the same cc.

 

Ive never seen that 4V head either. I also didnt see anything about the HD kick gears?
My wife leaves for China on Monday, then takes a cruise to Japan. I have her searching out pricing on a Yosh kit for me. I currently have a Kitaco 145se, with scored cam journals and Im petrified to kickstart the damn thing.

 

How's the conversion coming OP?