| Banshee NATIONAL Porting & Head Rechambering |
Part Number: PO-3500
Price: $595.00
Availability: CALL US!
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| Note: This is a service which is not available online. Please call Duncan Racing International and a DRI staff member will assist you by collecting the specifications required and placing your order. Thank you. |
Product Information:
Yamaha Banshee Porting Type Options
NATIONAL Cross Country (low end)
NATIONAL Midrange (midrange)
NATIONAL High Rev (top end)
All PTR porting types same price.
PTR Porting and Stock Head Rechambering $595.00
PTR Porting (use Powerhead at additional cost) $550.00
Powerhead $299.00
*If customer already has a Powerhead, they may purchase a matched dome(for ported cylinder)for $69.95 and use their existing Powerhead outer shell.
*Cylinder Boring and Pistons are not included in price. DRI can bore cylinders and supply new piston at addditional cost
Models
Fits:
Yamaha Banshee
Cores Required
Cylinders and Head(if stock head modification is desired)
*Customer must send in their cylinder for PTR Port modification or purchase new cylinders direct from DRI
Power Emphasis
NATIONAL XC:Power emphasis very Strong Bottom and Good Midrange Pull
Best Carburetor:34mm PJ Keihin
Best PTR Pipe: Midrange
NATIONAL Midrange:Good low end throttle response, excellant midrange, good top end,
likes to pull a taller gear
Best Carburetor:34mm PJ Keihin or 35mm PWK Keihin
Best PTR Pipe: Midrange or High Rev
NATIONAL High Rev:Power emphasis; good Bottom end Strong Midrange Pull, Very Good Top End.
Strongest Power at 3/4 throttle
Best Carburetor:35mm PWK Keihin
Best PTR Pipe: High Rev
Power Gain
Over 20% over stock, peak
Reliability Rating
With proper maintenance, PTR Porting is 80% reliable as stock
Application Recommendation
XC/Low End: Cross Counrty/Tight Woods Riding and or Racing
Midrange: Motocross, Sand Dune Riding, Trail Riding, Gran Prix Races,
*Best Overall PowerBand
High Rev/Top End: Drag Racing, Hill Racing, Asphalt Drags, TT & Flat Tracks
Special Notes
DRI has spent 1000's of hours testing, doing R&D on 2-stroke port types and designs. There are no quick read manuals to explain the complexity of 2-Stroke porting.
Data must be gathered and recorded and analized, to help properly design cylinders that not only perform properly but give the reliability and consistancy expected from DRI
DRI PTR ported cylinders have won more Pro ATV Races and Pro ATV Championships than any other company in the world over the last 2 decades
All port work is 100% quaranteed
All PTR cylinders have port timing degreed in and all port dimensions are blued and scribed for MAXIMUM consistancy
PTR Porting is a labor service modification
All PTR porting is performed in house
All PTR ported cylinders and individually serial numbered. With data recorded in a DRI data file, for future referance
For Maximum performance and reliability with a PTR ported cylinder it is imperative the piston, rings and cylinder bore are kept good conditions.
Piston clearance should ALWAYS be kept under .005 of an inch
Quality Cylinder Boring and Proper Port Chamfuring is critical to the performance and reliability of your cylinder.
When these services are required for your engine, be sure that they are performed by DRI or a highly trained technician
Paul Turner Racing Products are a proprietary brand of Duncan Racing International, Inc.
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