yamaha yfz 450 (2004) evolution exhaust system yfz450 04+ evt.pdfakrapovic evolution exhaust system...
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Yamaha YFZ 450 (2004)
Evolution Exhaust System
www.akrapovic-exhaust.com2Product code: 103579 (AS-Y4ET1-DTT)
Akrapovic Evolution Exhaust Systemfor the Yamaha YFZ 450 (2004)
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Description
ATV
Series
If the Akrapovic Slip-On system does not satisfy your needs for increased per-formance, we also offer an Akrapovic EVOLUTION complete exhaust system. This system offers a major increase in power and torque. Like the Slip-On sys-tem, the EVOLUTION is designed in order to satisfy both the European and American markets. For the European market, the system has a built-in FIM 94 dB Enduro noise damper, and for the American market it has an approved spark arrester. This system is intended for riders who expect maximum performance from their exhaust system.
PERFORMANCE
Measurements of the Akrapovic EVOLUTION system on the YAMAHA YFZ 450 (without spark arrester or noise damper):
Power: the Akrapovic EVOLUTION system offers a substantial improvement on the performance of the Slip-On system. The engine gets to breathe to its fullest through-out the entire rpm range. Max. power is 44.85 HP at 9500 rpm. With the spark arrester installed the result is even better: 45.08 HP. The system complements the engine perfectly, which is shown with the max. increased power coming at the very top of the range at 8000-10000 rpm.Torque: if you like the power curve, take a look at the torque curve. The torque gets a massive boost from the Akrapovic EVOLUTION system, making it extremely respon-sive to twisting the throttle.
CONFIGURATION
The Akrapovic EVOLUTION system for the Yamaha quad is the popular Offroad de-sign, which suits the ATV character. The header tube is conical and made of titanium. It is attached to the conical titanium link pipe with a free-floating joint held together with a silicon-shielded tensioning spring. The link pipe is welded to the muffler. The inlet cap is made out of stainless steel due to the weld with the link pipe. The muf-fler inner perforation is also made of stainless steel. The outlet cap and muffler outer sleeve are made of titanium. The system is attached to the quad using two Akrapovic carbon-fiber road clamps. For the European market it has a built-in FIM 94 dB noise damper, and for the American market it has an approved spark arrester, which is indi-cated by a laser engraving on the muffler.
Technical specifications of Akrapovic exhaust systems and related products subject to change without notice.
PERFORMANCE
stock AKRAPOVIC max. increased power
max. rear wheel power HP / rpm
(measured on Dynojet ATV) 39 / 8300
44.85 / 9500(without noise damper &
spark arrester)45.08 / 9500(spark arrester)
8.07 / 9500(without noise damper &
spark arrester)8.30 / 9500 (spark arrester)
CONFIGURATION CONFIGURATIONheader tubes collector link pipe
material TITANIUM - TITANIUM
tube shape CONICAL - CONICAL
interference crossover tubes
- lambda sensor -
header tube inner sleeves S.S. CNC MACHINED header tube flanges ALU CNC MACHINED
header tubes - collector connection
-collector / header tube -
link pipe connectionFREE FLOATING + SILICON
SHILDED SPRING
link pipe - muffler connection
WELDEDmuffler
inlet cap /outlet capTITANIUM / TITANIUM
muffler metal interior TITANIUM muffler outer sleeve TITANIUM
muffler clamp 2x CARBON-FIBER ROAD muffler bracket -
muffler insert FIM 94 dB ENDURO (EU market)SPARK ARRESTER (US market) heat shield CARBON-FIBER
OPTIONSlink pipe noise damper muffler bracket heat shield
- - - -
ADDITIONAL DATA
weight comparison (kg)
stockAKRAPOVIC difference
5.22RACING EVOLUTION stock - RACING
stock - EVOLUTION
- 2.11 - 3.11
noisemeasurements
(dB / rpm)
stock AKRAPOVIC
88.5 / 4000 100 / 4000 (without noise damper & spark arrester)
98.3 / 4000 (spark arrester)
possibility of periodicservice without removing
A.E.S.
oil oil filter
YES YES
legal for street use NO
www.akrapovic-exhaust.com3Product code: 103579 (AS-Y4ET1-DTT)
Akrapovic Evolution Exhaust Systemfor the Yamaha YFZ 450 (2004)
Akr
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VSeries
Exhaust Photo
CARBON-FIBER MUFFLER CLAMPS ANTI-SEIZING GREASE
www.akrapovic-exhaust.com4Product code: 103579 (AS-Y4ET1-DTT)
Akrapovic Evolution Exhaust Systemfor the Yamaha YFZ 450 (2004)
Akr
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xhau
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yste
m T
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y co
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VSeries
Bike Photo
www.akrapovic-exhaust.com5Product code: 103579 (AS-Y4ET1-DTT)
Akrapovic Evolution Exhaust Systemfor the Yamaha YFZ 450 (2004)
Akr
apov
ic E
xhau
st S
yste
m T
echn
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y co
pyrig
ht 2
004,
all
right
s re
serv
edAT
VSeries
Bike Photo
www.akrapovic-exhaust.com6Product code: 103579 (AS-Y4ET1-DTT)
Akrapovic Evolution Exhaust Systemfor the Yamaha YFZ 450 (2004)
Akr
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ic E
xhau
st S
yste
m T
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004,
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VSeries
Schematic
103578 (P-HF123) MUFFLER FITTING PARTS
101564 (P-HSY4M1) CARBON-FIBER HEAT SHIELD
102234 (P-S2) SPRING
101976 (P-KP1) ANTISEIZING GREASE
101922 (P-24) INNER SLEEVE
101855 (P-FY4) FLANGE
103576 (AH-Y4ET1) HEADER TUBE
103577 (AM-TTY4D1) MUFFLER
103641 (P-ST2AA) STICKER
101631 (P-MCTD1) CARBON-FIBER CLAMP
www.akrapovic-exhaust.com7Product code: 103579 (AS-Y4ET1-DTT)
Akrapovic Evolution Exhaust Systemfor the Yamaha YFZ 450 (2004)
Akr
apov
ic E
xhau
st S
yste
m T
echn
olog
y co
pyrig
ht 2
004,
all
right
s re
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VSeries
Diagram / Chart
) ph( rewo
P )M-
N ( e
uqro
T
10
15
20
25
30
35
40
45
50
20
22
24
26
28
30
32
34
36
38
40
3 4 5 6 7 8 9 10 11 12 Engine Speed (RPM x1000)
DYNOJET RESEARCH CF: SAE Smoothing: 5
STOCK EXHAUST(88.5dB).drf - Run Conditions: 25,05 °C, 973,63 mBars, SAE: 1,04AKRAPOVIC COMPLETE EXHAUST(100dB).drf - - Run Conditions: 25,45 °C, 972,89 mBars, SAE: 1,04AKRAPOVIC COMPLETE EXHAUST(with spark arrester-98.3dB).drf - - Run Conditions: 26,13 °C, 973,19 mBars, SAE: 1,04