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[porthole]

"I'd rather be Riding my Hemi."


Revolution Performance Motors, Inc is dedicated to providing high quality 4 valve engines and head sets for your V-Twin needs. Our Patented 4 Valve heads move 1.5 times more air than the stock 2 valve head. Due to the pentroof design of the heads and the position of the spark plug in the center of the chamber, we are able to run less timing advance. This allows us to run higher compression without pinging or knocking.
A stock 97 cu. in. 2 valve motor can make 70-80hp. The same motor with our 4 Valve Head kit installed makes 90-100HP. When it comes to getting off the line, our 4 Valve Heads give your 97 incher over 100ft/lbs of torque at 4000rpm. A 2 valve engine puts out about 90ft/lbs at the same rpm.

Our 4 Valve Head Kits will fit any Evo or aftermarket V-Twin engine up to 125 cu. in. From 3.5" bore up to 4.25"

With 15% more torque on tap at all engine rpms, you can have passing power without having to downshift. Just crank the throttle and hold on!!

For even more performance we have our "Ram Chamber"(TM) available to install dual carbs. With the 2nd carb acting as a vacuum secondary you can be assured the your bike will be able to breathe all the way to REDLINE rpm.

http://www.rpmhemi.com/conversion_kits.html

[110tHunDer]

 
Fits Evos.  Hmmmmm.

[110tHunDer]

 
4ValveTM Hemi Twin Cam Conversion Kit





Currently Available for the early Carbureted Twin Cam motors.

The Delphi EFI Version is in testing and will be a big hit.
Please e-mail us at Sales@RPMHemi.com to be placed on the wait list.



Part Number 20-001         Price $3099.00

[porthole]

Somehow I knew you would the first to reply Brian 

I like it.

[Trapperdog]

Considering the Honda 110 is a three valve head and the yamaha 113 is a four valve head this could be an interesting Idea. I think Yamaha is still using the 43mm TB on the 113 also. Could be wrong though

[golaith69]

hello;  all , i  DID NOT NOTICE WHAT THE --CC'S  were on those  heads !!! BUT could be an interesting concept ... thanks