How to Tune the Honda CB 750 eHow UK

15 Мар 2015 | Author: | Комментарии к записи How to Tune the Honda CB 750 eHow UK отключены

Honda CB 750

How to Tune the Honda CB 750

Learn how to up a Honda CB 750 motorcycle

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Things you need

Locate the air box under the fuel and next to the carburettors. Remove the two down screws and release the of the air box. Remove the air cleaner and throw it away. Install a new air elements into the air box.

the bottom of the air box with the hold screws.

Start the engine and bring it up to operating temperature. Shut the engine. Loosen all four plug wires and remove the plugs.

Examine the spark for burnt electrodes, raw gasoline, carbon or other problems may indicate an internal engine If any plug indicates a problem that cylinder, then problem must be corrected before any further tune-up can be

Connect the compression gauge to the one cylinder. The number one cylinder is the one to the left as you look at the motorcylcle sitting on it. Press the starter and turn the engine over for 4 to 7

Record the reading on the compression

Remove the compression gauge the number one cylinder. Repeat 3 for each of the remaining cylinders. The readings are not as important as the difference the cylinders.

If the readings deviate than 10 psi then there is a with the piston rings, or carbon build up.

Gap four new plugs to 0.24 to 0.28 the spark plug gapping Place a small drop of oil the spark plug threads and the plugs into the cylinder hand tight. Tighten the plugs and additional 1/4 to 1/2 turn the spark plug wrench. the spark plug wires.

Over-tightening the spark plugs destroy the plug gasket and may the machine threads in the spark hole.

Remove the ignition and connect a tachometer to the ignition Connect the inductive timing pickup to the number one cylinder. the timing light power to the battery.

Start the engine and set the speed to 1,000rpm.

Honda CB 750

Loosen the screws at the outer edge of the base plate. Shine the light strobe into the of the timing base. Rotate the plate until the "1.4F-1" lines up with the fixed Tighten the timing base screws securely when the has been adjusted correctly.

Disconnect the timing light and Replace the ignition cover.

the seat of the motorcycle and turn off the supply valve. Remove the covers and the gas tank hold bolt. Lift the tank up and to the to remove.

Remove the four plugs from the carburettors. carburettor has one vacuum plug. the multi-port manometer by attaching the leads of the tool to the ports on the

Ensure that the lines are in order from one to four on the

Start the engine. Record the of each cylinder. The multi-port will measure vacuum in

If any cylinder deviates more 2.4 inches from the others, adjustment is required. The number 2 is not adjustable and will be used as a reference for all other adjustments.

the adjustment screw and locknut the number 1 and 2 carburettor. Loosen the and turn the adjustment screw number 1 reads less 2.4 inches difference from the 2 carburettor. Tighten the adjuster locknut without changing the

Place the fuel tank on the motorcycle temporarily. Turn the valve on and allow the gas to flow for at 1 minute to refill the carburettor Remove the gas tank and set it aside.

Honda CB 750
Honda CB 750
Honda CB 750
Honda CB 750

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