RB racing in michigan. Heres a list of there prices and they do unbelieveable work!
BASIC CLEANUP PORT $50 per cylinder
This porting will clean up all casting flaws and include porting of the intake and exhaust ports. This porting is an economical way to get good results for any type of riding.
MX/TRAIL PORT ($125 singles, $175 banshee's)
This porting will get you more than a seat of the pants power increase. Port heights, widths for all ports are modified and transfer inlet angles are all properly set for excellent low end and midrange power.
AGRESSIVE/DUNE PORT ($125 singles, $175 banshee's)
This porting will get you the absolute maximum power increase while still maintaining complete reliability and only a slight upward shift in the powerband. This is the most popular and best value porting we have. Complete alteration of all porting heights, widths, tranfer inlet and outlet angles are set-up using computer design software. Suggested for motors with pipes, reed mods and head work. Dollar for dollar you won't find a better port.
DRAG/FULL PORT ($200 singles, $325 banshee's)
Port widths and heights are maximized for peak power performance. Most cylinders will have additional intake ports, and/or boost ports added. Quads will require good pipe, head work, timing advance.
http://groups.msn.com/RBRacingTwoStrokePorting