Service
Turbo Oil Leak sources
Hi all
Anyone in need of the main shaft seal for a Seca Turbo oil pump -
The seal is not listed by Yamaha as they only ever sold complete pumps which
are now obsolete.
I have managed to track down what appears to be an identical seal as used in
many Honda model oil pumps including the GL1800 Gold Wing.
The Honda part number is 91208-MN1-771 and the seal size is 11 x 15 x 3mm
If this seal has failed you will be getting oil flowing back to the turbo
Cylinder and Piston -- Inspection and Repair
F. Cylinder
1. Inspect the cylinder walls for scratches. If vertical scratches are evident, the cylinder wall should be rebored or the cylinder should be replaced.
2. Measure cylinder wall wear as shown. If wear is excessive, compression pressure will decrease. Rebore the cylinder wall and replace the piston and piston rings. Cylinder wear should be measured at three depths with a cylinder bore gauge. (See illustration.)
Cam Chain Adjustment
The cam chain becomes stretched with use, resulting in improper valve timing and engine noise. To prevent this, the cam chain ten-sioner must be adjusted regularly.
1. Remove the timing plate cover.
2. Slowly rotate the crankshaft counterclockwise until the "C" mark on the timing plate aligns with the stationary pointer.
Chapter 1, GENERAL INFORMATION and SPECIAL TOOLS
GENERAL INFORMATION
Introduced in 1985 the Maxim X resulted from a request of Yamaha USA for a "little brother" to the upcoming V-Max. Mother Yamaha already had the 750 Maxim and the 750 Virago, and plans for the new FZ750 (to replace the vernerable 750 Seca). They balked at building yet another unique engine in that class, so a compromise was struck: Yamaha would design the new FZ "Genisis" 5-valve motor to fit on a standard XJ transmission utlizing the strengthened gearset of the XJ900 and 650 Turbo models, and the MaximX was born.
Thermostat
REMOVAL AND DISASSEMBLY
1. Drain coolant
2. Remove horns 1
3. Disconnect electrical leads 2
Middle Gear -- Inspection and Repair
P. Middle Gear
1. Damper disassembly
NOTE:
Disassembly of the middle gear damper requires the damper compressor (special tool) and a hydraulic press.
a. Place the middle drive shaft in a press with the damper compressor (special tool) in place as shown.
Piston, Pickup Coil, Shifter, Starter, Generator and Clutch Removal
C. Piston
1. Mark each piston to aid in reassembly.
2. Place a clean towel or rag into the crank-case to keep circlips and material from falling into the engine.
3. Remove piston pin clips, piston pins, and pistons.
D. Pick-up Coil Assembly
Cable and Fittings
A. Cable maintenance
NOTE:
See Maintenance and Lubrication intervals charts. Cable maintenance is primarily concerned with preventing deterioration through rust and weathering and providing proper lubrication to allow the cable to move freely within its housing. Cable removal is straight forward and uncomplicated. Removal will not be discussed within this section.