February 2014 MXA – YZ450F PIPE SHOOTOUT

This pipe received universal                                                      
acclaim. It scored three first place
rankings out of four—and
the fourth rider ranked it second.
DR.D has a reputation for building
awesome Yamaha YZ450F exhaust
systems. This might be because
DR.D owner Doug Dubach was the
Yamaha test rider who developed all
the Yamaha’s four-strokes—from the                                                                                
1998 Yamaha YZ400 on up to the
current model.
WHAT WERE THE MOST
COMMON TEST-RIDER
COMMENTS?
“This was the best all-around pipe
of the five. It did everything right
from the bottom through the middle.”
“The DR.D pipe produced the best
midrange power. It felt crisper than
the other pipes.”

“This would be my choice because
it felt torquier from the bottom to
the middle. It doesn’t have the
irritating bark off the bottom that
the stocker has, but is the strongest
where it counts.”


“It was fairly seamless through the
middle. Best of all, it ironed out the
flat spot and dip in the stock powerband.
It was the most raceable of all the pipes.”
TEST-RIDER RANKINGS BY

SKILL LEVEL
Pro: First
Vet Pro: First
Intermediate: Second
Novice: First
DR.D NS-4 DYNO NUMBERS
Here are the DR.D YZ450F dyno
numbers.
rpm …………………………….horsepower
5000 …………………………………………….25.55
6000 …………………………………………….37.11
7000 …………………………………………….47.34
8000 …………………………………………….53.61
9000 …………………………………………….59.90
10,000 ………………………………………….58.88
Peak……………………….59.50 @ 9700 rpm
DR.D NS-4 TORQUE NUMBERS
The DR.D exhaust produces 35.99
foot-pounds of torque at 7400 rpm.
This is 0.23 foot-pounds more than
stock. The DR.D pipe makes the
most torque in this test.
WHEN IT BREAKS
50 HORSEPOWER
The DR.D YZ450F exhaust pipe

first breaks 50 horsepower at 7400

rpm. This is 100 rpm later than the

stocker’s 7300 rpm.


Dirt Bike Magazine: 2013 Honda CRF450R Mods (June 2013)

The 2013 CRF450R is a great bike in most areas, but the engine department needs help along with the extra weight the dual exhaust carries. The DR.D system does just that, it trims nearly 3 full pounds off as it is the lightest exhaust system on the market at 7.9pds in stainless steel/carbon fiber. Our Titanium? It is even lighter. The performance increase will be slightly better off the bottom, carrying into a strong mid and continuing to pull farther than the stock unit on top.

Dirt Bike Magazine: DR.D YZ250 Test (June 2013)

The June 2013 issue of Dirt Bike Magazine, featured the Dubach Racing (DR.D) YZ250 2stroke on the cover

 

New for 2013 is the all new DR.D NS-2 exhaust systems available for YZ125's and YZ250's. Pro Tec's Mike Baker worked his magic on the engine to provide the punch test riders were looking for.

 

Mark Tilley collecting some style points aboard the YZ

 

(Top) Here is the YZ shown in stock condition before it received its facelift (Bottom) The Barnett billet clutch helped withstand the extra horsepower of the Pro Tec engine. RAD provided their trick D.I.D. Eaglelight Series combo wheelset.

 

For more information regarding this test, stay tuned for video updates on dirtbikemagazine.com

Josh Strang’s “New Ride”

Strang is taking the privateer route this year aboard a Kawasaki in hopes of regaining his GNCC championship belt

 

Josh is looking to capture his second GNCC championship with the help of Rock Mountain and DR.D

 


Dirt Bike Magazine — May 2013

The cover of the May 2013 issue

 

Test rider, Pete Murray, puts the Dirt Bike Magazine YZ450F through its paces

 

One of the key ingredients to improving the YZ450's handling was the installation of the DR.D Engine Relocation Kit

 


DR.D NS-2 Now Available

The YZ125 and YZ250 2strokes NS-2 exhaust systems can now be purchased through Dubach Racing directly. To order please call (951) 808-1114.


2013 DR.D CRF450: MXA Project Bike

Thanks to all of the companies who partcipated in turning a stock CRF450 into a race ready machine:

Enzo

Pro Taper

Moto Hose

R&D

Faster USA

Moto Seat

Galfer

DecalWorks

Applied

Maxima

Works Connection

Hotcams

Dunlop

Malcolm Smith Motorsports

Hinson


MXA: CRF450 Dual Pipe Shootout

Motocross Action Magazine held a dual pipe shootout on the 2013 CRF450 that featured in the March 2013 issue. The DR.D dual was the quietest exhaust (meeting sound regulations) and also the lightest exhaust. The system was a Stainless Steel/Carbon version. DR.D was the only company not to use a titanium head pipe/ mid pipe (which we do offer) and still reduced the most weight when compared to a stock system.