Towing; Exhaust Power Valve System - Yamaha SXV4NP Operator's Manual

2-Up Passenger Seat
(Transporter Lite)

NOTE: If additional cargo is being
added, maximum weight on the snow-
mobile (operator/passenger/cargo)
should not exceed the maximum lim-
itation set for each snowmobile. See
the chart in the Suspension — Over-
load Springs sub-section in the Main-
tenance section for details. Also, the
overload springs should be engaged.
! WARNING
Make sure the rear seat is securely
locked in place before carrying a pas-
senger or personal injury may result.
To remove the rear seat, remove the four
cap screws and nuts securing the rear seat
frame to the rear and side brackets.
Remove the seat assembly.
To remove the operator seat, remove the
screw from the underside of the seat. Then
lift the back of the seat and move it up and
rearward to remove it.
To install the operator seat, route the
front tab on the seat through the seat-base
hold-down bracket; then install the seat
and secure using the cap screw.
To install the passenger seat, secure the
seat frame to the top bracket using two
black machine screws (M6 x 35 mm) and
two M6 black flange nyloc nuts. Tighten
to 1.1 kg-m (96 in.-lb).
Secure the seat frame to the two side tun-
nel brackets using two black machine
screws (M6 x 25 mm) and two M6 black
flange nyloc nuts. Tighten to 1.1 kg-m
(96 in.-lb).

Towing

If the snowmobile is to be towed by another
snowmobile, do not tow using the loops in
the skis. The tow rope should be attached to
the lower A-arms.
Exhaust Power Valve
System
This RPM-controlled servomotor (servo)
actuated system adjusts the size of the
0755-116
exhaust ports to provide peak performance
throughout the RPM range.
The system consists of an exhaust valve
assembly mounted to the exhaust side of
each cylinder and connected by adjustable
cables to an electronic servo mounted
beneath the hood.
ONS-332
At low RPM, the exhaust valves are held in the
DOWN position by return springs. This gives
the engine a "low port" exhaust design cali-
brated to provide maximum low RPM power
and improve fuel economy at trail speeds.
ONS-328
0747-751
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