Two Brothers Racing Yamaha TTR90 - Manual

Y Y a a m m a a h h a a T T T T R R 9 9 0 0
F F u u l l l l E E x x h h a a u u s s t t S S y y y y s s t t e e m m
Parts List
Care & Cleaning
Keep system free of dirt and moisture. Store in a cool, dry place. For cleaning use a mild spray cleaner. Always
apply cleaner or polish with a soft, clean cloth.
Stainless Header System: Polished stainless steel pipes will turn a light golden hue after a few heat cycles, this is
a normal characteristic of high quality stainless steel.
Chrome Header System: Chromed header tubing will turn blue close to the exhaust ports, this is normal. To pre-
vent corrosion you must keep the header pipes clean.
Carbon Fiber & X-Metal Mufflers: X-Metal CF canisters will shift color from their original silver color to an amber
color after a few heat cycles, similar to the way our stainless steel headers shift color. Always make sure the fiber-
glass packing inside is in good condition and not burned out, as exhaust heat inside an empty canister will deterio-
rate the Carbon Fiber / X-Metal CF sleeve. TBR sells repack kits (TBR part # 005-10038) that include new rivets
and repack material as well as a drill bit (#30), making it easy to do yourself. Also, NEVER dyno test your bike with
carbon fiber mufflers installed - the intense heat and lack of cooling air can quickly cause the CF material to burn.
Two Brothers Racing does not provide a warranty for burned carbon fiber.
Aluminum Mufflers: Use an aluminum or mag wheel polish such as Mother’s to restore the bright finish to factory
spec.
Warranty
Two Brothers Racing products are intended for closed course competition purposes only, and therefore are sold “as
is” without warranty. Two Brothers Racing specifically disclaims any warranties of merchantability or fitness for a
particular purpose and disclaims all responsibility for consequential and incidental damages or any other losses
arising from the use of these products or parts.
We recommend that this performance exhaust system be
installed by a qualified motorcycle technician. If you have
any doubts as to your ability to install this exhaust system,
please consult with your local motorcycle dealer. Read all
instructions first before starting installation. Make sure the
motorcycle and exhaust system are completely cool before
starting the installation. Also, make sure the bike is secure
on the sidestand or ideally a rear service stand during
installation. Be sure to save all stock exhaust components
for possible use later.
1. Make sure the bike is completely cool before starting the
installation. Make sure the bike is secure on the sidestand or
ideally a rear service stand.
2. Remove the right, rear number plate panel.
3. Remove the stock exhaust system.
4. Install the TBR header.
5. Place a bead of the hi-temp sealant on the outside edge of
the header that goes into the canister. Slide the TBR canister
onto the end of the header. Wipe off the excess sealant that
will squeeze out.
6. Use the stock bolt to secure the muffler to the stock mount-
ing point. Leave loose for now.
7. Make sure everything is aligned and tighten all hardware.
8. Before you run the bike, clean off all fingerprints and dirt, as
any oily residue will etch the metal and become somewhat
permanent when the system gets hot. Run the bike and
enjoy. It is normal for some white smoke to appear the first
time you start the bike. This is packing/manufacturing oil from
inside the pipe burning off. Check for gaps or leaks. If you
find a leak, a little high temperature silicon sealant should fix
it. After your first ride, recheck all fasteners for tightness.
IMPORTANT - PLEASE READ CAREFULLY
TTR90 Exhaust Instructions.qxd
Installation Instructions
Care & Cleaning / Warranty
QTY. DESCRIPTION PART NUMBER
1 HEADER (STAINLESS STEEL) 005-5101N
1 MUFFLER -
1 HI-TEMP SEALANT 031-P22072