Koso wh640mm000-MSX Performance Camshaft Instructions

Koso wh640mm000-MSX Performance Camshaft

Thank you for purchasing our product. Before installing/operating the product, read the instructions carefully and retain them for future reference.

NOTICE

• Correct tools must be used for installation.
• For installation, follow the steps described. Any damage caused by wrong installation shall be imputed to the users.
• Do not disassemble or change any parts. Opening and disassembling this unit will void any warranty.
• Maintenance and repairs should be executed by our professionals only.

Symbol Description

Accessories

Optional Accessories

Removing The Camshaft

Follow the instructions

1. Fixed screw
2. Washer
3. Timing sprocket (camshaft sprocket)
4. Fixed screw
5. Fixed plate
6. Camshaft

Use lubricating oil before installing

NOTE
Perform the dismantling according to the method indicated in the figure. The installation should be performed in reverse sequence for the dismantling procedure.

NOTE
The timing sprocket must be adjusted to the positive position before removing the camshaft (Please refer to steps 2-2).

Instructions for Timing Gear Adjustment

1. Rotate the Distribution Panel Rotor with the appropriate tool and then adjust till the TDC marking is correctly aligned with the marking on the generator.
2. Confirm that the Cam Shaft Sprocket marking is correctly aligned with the marking on the cylinder head.

NOTE
Perform the dismantling according to the method indicated in the figure. The installation should be performed in reverse sequence for the dismantling procedure.
NOTE When installing the Can Shaft, the chain should be kept tight.
CAUTION! When dismantling, be sure to adjust the Timing Gear marking first and then proceed with the dismantling operation.
CAUTION! When installing the Cam Shaft, do not attempt to turn the crank to avoid damaging the value or causing a timing error in the valve.
WARNING! After completing the installation of the Timing Gear and chain, please check if the relative markings are correctly aligned. Before starting the machine, perform a running test to ensure that the machine is correctly installed.

Adjusting Valve Clearance

1. First, loosen the fixing nut.
2. Insert the feeler between the adjustment screw and the valve terminal.
3. Use the valve adjustment tool to rotate the adjustment screw with direction or until you get the specified valve clearance.
4. Properly lock the fixing nut after adjusting the clearance and then insert the feeler again to confirm the clearance value.
5. If the value is not correct, repeat steps 1-4 until the clearance value is within the standard.

Valve clearance → intake valve 0.08$0.02mm →exhaust valve 0.20÷0.02mm

NOTE
Direction a → valve clearance increases;

Direction
b → valve clearance reduces.

WARNING!
The measurement and adjustment of the valve clearance can only be executed when the engine is cold (room temperature).

WARNING!
must be a surprise sidiust dead center the piston Location

Camshaft features description

DYNO Acceleration Test Diagram

NOTE O KOSO 54mm Cylinder+KOSO Camshaft+KOSO Piston.
NOTE 2 Stock
NOTE
Test results vary with the testing environment and weather. This test chart is for reference only.

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