Exhaust System - Yamaha WaveRunner FX140 Service Manual

EXHAUST SYSTEM

Four exhaust pipes of equal length are connected to each cylinder and are combined midway to
form a single exhaust pipe. This pipe is called a "collecting pipe" and it contributes to high perfor-
mance.
In addition, the exhaust pipes are the same length as those of the YZF-R1.
All the exhaust pipes utilize a double-pipe construction.
Cooling water passes around the exhaust pipes to cool the pipes and to prevent heat from transmit-
ting to surrounding areas.
Fig. 7
7