
Two Brothers Racing
s1R/taRmac Repack kit
Part # 005-10038S1
Description
Repack a ll road c anister s every 5 ,00 0 miles. Part # 00 5-10 038 
Repack a ll off ro ad canis ters af ter ever y 10 hours of us e. Part # 0051003 8MX
Qty. Description  Part Number
1  Packing Material  005-PACKING 
7  Marson RIvet  005-H-51-54SSPG 
1 O-Ring  005-7-7 
1  6mm Drill Bit  005-9-DBTIN
Installation Instructions
1.  Make sure the bike is completely c ool befo re star ting the install ation 
and is secured to a center stand o r ideall y a serv ice lif t. The n, remove 
the muf er asse mbly fro m the bike.  
Note: The follo wing steps p erta in to both the Tarmac and S1R mufe rs.
2.  Using the provided dri ll bit, c arefull y drill ri vets on th e outlet si de of the 
muffle r to remove ri vet head s. Then w ith a punc h and hamm er, drive 
the rivet b ody thr ough the mu ffler s leeve and o utlet.
3.  Separate th e outlet flange an d inner core from the mu ffler s leeve.
6.  Wrap the new pa cking ma terial ar ound the p erfor ated core tightl y and 
wrap as mu ch of this ma terial around the c ore as will fit into the s leeve. 
Use maski ng tape to secure it .
7.  Ins ert the n ewly wr apped p erfor ated core into muff ler sleev e. Repla ce 
o- ring on ou tlet flan ge and the n instal l into the sle eve. Make su re the 
perforated co re seats fully into b oth inlet an d outlet f lange completely.
8.  Use a hole punch to align ri vet holes.
IMPORTANT - PLEASE READ CAREFULLY
We recommend that this performance par t be installed by a qualied technician. 
If you have any doubts as to your abilit y to install this per formance part , 
please consult with your local motorcycle dealer. Read all instructions rst 
before star ting installation. Make sure the motorcycle and exhaust system are 
completely cool bef ore starting the installation. Also, make sure the bike is 
secure on a center stand or ideally a service lif t during installation. Be sure to save 
all stock components for po ssible use later.
Warranty
Two Bro thers Ra cing produc ts are in tended for c losed cour se compe tition p urposes o nly, and the refore ar e 
sold “a s is” with out warra nty. Two Br others R acing speci cally d isclaims an y warrant ies of mer chantabi lity 
or t ness for a pa rticul ar purpose a nd disclai ms all respo nsibili ty for co nsequent ial and inci dental da mages or 
any ot her loss es arising f rom the us e of these pr oducts o r parts .
Care & Cleaning
Care & Cleaning
Keep system free of di rt and mo isture. S tore in a co ol, dr y place. M ake sure vehicle is co mpletel y cool 
before maintenance. 
Repack a ll road c anister s every 3 ,00 0 miles . Part # 00 5 -1003 8 
Repack a ll off ro ad canis ters af ter ever y 10 hours of us e. Part # 005-100 38 MX
NEVER dyno test you r bike with c arbon  ber or ti tanium c anister s installed - the in tense heat and lack 
of cooling air can q uickly burn thro ugh the c anister m aterial . Two Brothers R acing does not pro vide a 
warranty for burned canisters.
4.  Remove all existing pac king material fro m the per forate d core, if yo ur 
caniste r came wi th a stain less steel wool wr ap aroun d the core l eave 
this in pla ce.
5.  Measure the core and cut n ew packing one inc h longer.
9.  Using a rivet tool and the provided stainless steel r ivets, r ivet the outlet 
flange b ack onto th e muffl er end. Re -u se origi nal rivet bands. M ake sure 
all the hol es line up the same way as they did o rigina lly or you r muffler 
may end up p ointing i n a differ ent direc tion wh en installed.
10. Check for p roper c anister/ collector alig nment and r einstall the canister(s) 
to the motorcycle. 
11. Double c heck to ma ke sure that all hardw are is tightened befo re you run 
the bike, clean off all nge rprint s and dirt , as any oily residue will etc h the 
metal and b ecome s omewha t perma nent when t he system g ets hot. R un 
the bike and enj oy. It is n ormal for some white smoke to appe ar the rst 
time you st art the bike. This i s packi ng/m anufac turing o il from ins ide the 
pipe bu rning off. Che ck for gaps o r leaks . If yo u nd a leak , a lit tle hi gh 
tempera ture sil icon s ealant should x it . Afte r 50 t o 100 m iles, r echeck all 
fasteners for tightness.