For jetting requirements please go to our website at

For jetting requirements please go to our website at
2038 Second St., Norco, CA 92860
Tel: 951-808-1114 Fax: 951-808-1116
YZ450F 06-09 COMPLETE EXHAUST SYSTEM
BEFORE PERFORMING ANY WORK, ALLOW THE VEHICLE TO COOL FOR AT LEAST 2
HOURS PRIOR TO ANY WORK.
ALWAYS WEAR PROTECTIVE EYEWEAR AND GLOVES BEFORE ATTEMPTING WORK.
Removal of Factory Exhaust System
1. Remove one (1) 8mm bolt and one (1) 6mm bolt that secure the right side rear number plate to the sub-frame (Set
these bolts aside as they will be re-used). Remove right side rear number plate.
2. Using a 10mm socket head wrench, loosen the pipe clamp that secures the factory mid-pipe to the factory headpipe.
3. Remove two (2) 8mm bolts that secure the factory silencer to the sub-frame (Set the muffler bolt aside as it will
be re-used). Remove factory silencer.
NOTE: The factory gasket will not be re-used.
4. On a work bench, carefully remove the collar washer and rubber grommet (Set these parts aside as they will be reused).
5. Remove two (2) 8mm nuts that secure the factory head-pipe to the motor (Set these nuts aside as they will be reused). Remove factory head-pipe.
Installation of the DR.D Complete Exhaust System
6. Inspect crush gasket from any dirt and/or debris.
NOTE: DR.D recommends replacing the crush gasket for optimum seal.
7. With the crush gasket properly in place, install the DR.D Head-Pipe using the original 8mm nuts but do not
tighten.
8. On a work bench, carefully install the rubber grommet and collar washer removed from step 4. The collar washer
should be facing with the washer end towards the left side of the DR.D Silencer.
NOTE: TI/TI and CF/TI systems will use supplied aluminum cones in place of the rubber grommet
and collar.
9. Install the DR.D Silencer by carefully sliding the DR.D Mid-Pipe over the DR.D Head-Pipe.
10. Using the supplied 8MM bolt, begin by securing the DR.D Mid-Pipe section to the sub-frame but do not tighten.
Now secure the DR.D Silencer to the sub-frame using the original 8mm bolt. Tighten the two (2) 8mm bolts.
11. Go back and tighten the two (2) 8mm nuts from step 7.
12. Secure the right side rear number plate using the original 8mm bolt and 6mm bolt removed from step 1 and
tighten.
13. RE-CHECK ALL YOUR WORK.
AFTER 30 MINUTES OF RIDING, GO BACK AND RE-CHECK ALL NUTS AND BOLTS.
PART NUMBER
PARTS LIST
DESCRIPTION
QTY.
DR.D COMPLETE EXHAUST SYSTEM
1
BOLT-MS-8MM X 1.25MM X 16MM 8MM BOLT
1
LT25S
TORX WRENCH T25 SHT ARM
1
9502
CLEAR STICKER
1
If you have any questions, please call DR.D Customer Service at 877-Dubach1 or visit dubachracing.com
For jetting requirements please go to our website at dubachracing.com
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