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Yamaha
Nytro Double Step Header Pipe
We have developed a new header pipe for the Yamaha Nytro which delivers an
additional 8 hp. The first section of the header pipe is increased from the
stock 1.375" o.d. tubing to 1.5" tubing. Halfway up the collector
junction the tubing is increased to 1.625". This extra flow area
results in an extra eight horsepower increase at the 8600 rpm power peak,
and an 11 hp increase past the power peak at 9200 rpm making the power
curve almost flat all the way to 9200 rpm. Torque is improved by 8.4
lb.-ft. at the power peak. This is the most powerful header pipe you will
find anywhere for a Yamaha Nytro, and a great choice for a performance increase
if you want to run the stock muffler. The header pipe is designed from deep
draw steel and silver ceramic coated for protection against the heating and
cooling cycles from snow hitting it. If the header pipe is used in
conjunction with the Mega Power Silencer, total power increase is 14 hp,
bringing peak power to 157.8 at 8600 rpm. If both are used together, a DYNO
JET EFI Tuner should be installed in order to richen up the fuel mixture.
DYNO JET EFI TUNER
2008 Nytro models, part number YAC0678
2009 & up Nytro models, part number YAC0991
A right angle end piece is now available to direct the exhaust up or out
the sides for those who wish to install an extra tank can or accessory bag.
Yamaha NYTRO FX With AAEN Mega Power Silencer:
The Yamaha NYTRO FX is Yamaha's Best four-stroke effort to date. The Yamaha
NYTRO FX is both light and powerful, and is the basis for Yamaha's
Sno-Cross factory effort. The Yamaha NYTRO FX stock horsepower peaks at 138
hp at 8600 rpm, with such a long power curve that the torque peak is 90
lb-ft below 7500 rpm.
The Aaen Mega Power Silencer is constructed from steel and is silver
ceramic coated both inside and out to take the abuse of constant heating
and cooling cycles as it is showered by snow from the track. The 4"
body houses a 2.5" core, and is packed with the best grade four-stroke
fiber silencing material. The silencer is quickly rebuildable by removing
the billet end cap, which is fastened with six screws. A red anodized end
plate sandwiches in place the chrome outlet tube, and the removable
"quiet core".
The Mega power silencer produces 144 hp at 8600 rpm, and max torque is
above 93 lb-ft below 7500 rpm. This is a 6 hp increase over stock with an
additional 3 lb-ft of torque. With the "quiet core" installed,
the power peaks at 142.5 at 8500 rpm, with 92 + lb-ft of torque below 7500
rpm. With the "quiet core" installed, sound level drops another 4
dB (A) (40%). The Aaen Mega Power Silencer for the 08 Yamaha NYTRO FX is 7
lbs. lighter than stock and is a direct bolt-on in place of the stock
muffler. An additional bracket is included to hold the rear plastic cover
in place.
The extra power and lighter weight adds increased excitement to the 08
Yamaha NYTRO FX and with its quality construction, quiet core and easily rebuildable
features, the Aaen Mega Power Silencer should make it a hit for both racing
and trail riding.
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