Moto Guzzi service?

31 Mar 2015 | ደራሲ: | ጠፍቷል አስተያየቶች ላይ Moto Guzzi service?
Moto Guzzi Jackal

Moto Guzzi service?

Join Date 24th June 2004 – 16:27 Bike So old you won’t care Location Kapiti Posts 7,264 Blog Entries 1

Pete and Debs at Moto Kiwi for parts and advice on oil.

For what its worthI use Penrite oil in da engine, any EP90 in the box and Motul in the diff (the one fortified with Moly)

Setting the tappets at tdc is confusing on a guzzi the first time (for some)

Most, ok, many, engines are set on the heel of the cam and because of overlap on many engines setting them at tdc is impractical as they are either open or on the opening ramps. The confusing part is setting them on the marks S (ግራ) and D (ቀኝ) because in the excitement folks forget that the marks pass the pointer twice in each cycle and tdc is not when the mark is reached every time, its every second time. Given the uneven firing of the engine it feels ‘wrongto many folks ending up with clattery noises and bent push rods.


Basic Instructions for a Guzzi Big Twin Valve Adjust

1. Put machine on stand then remove spark plugs.

2. Move back wheel back and forth. Select a high gear, at least fourth.

3. Remove both rocker covers.

4. Obviously the rocker to the front of the bike is the Exhaust rocker, the one nearest the

carb/injector is the Inlet rocker.

5. Now watch one cylinders rocker gear at the same time get a friend to rotate the rear

wheel in the normal (forward) direction of rotation (DOR) ቀስ,

6. Now what you want to do is first watch the EXHAUST rocker go down and come back up,

carry on rotating and do the same to the INLET rocker but as soon as the rocker stops

cease rotating the rear wheel for a moment, then find a small piece of rod say 2MM wide

by at least 300MM long, insert through the spark plug hole and rest on top of piston

then continue rotating wheel slowly until the rod comes up toward you to the highest

point then stop. The piston will be near enough at TDC to set valve clearances.

7. You will need to know the clearance for you’re particular machine stated in the (ManSpec)

Manufacturers Specifications, look in the manual under rocker / valve clearances.

8. Select a Feeler Gauge as stated by you’re manual and insert it in the clearance between

the rocker arm and the valve stem, so if it is a sliding fit with no excessive clearance the

valve will not need resetting. If the stated clearance is say 0.35MM, and a 0.37MM gauge

will slide slightly tight in the clearance I would not adjust it, but any clearance larger than

this then I would. If in the manual it states two clearance sizes, the larger clearance will

always be for the EXHAUST.

9. The same routine applies to the other cylinder, it doesn’t matter which is done first.

10. The clearances are adjusted via undoing the Locknut and rotating the screw in the

required direction, then retightening the locknut.

11. Once you have done the above the valve clearances are set.

12. Replace all covers and plugs rock the rear wheel to select neutral gear.

13. At the end of action #6 with the piston at the uppermost position, if you wanted to find

true TDC this is normally located on the flywheel, by removing the rubber bung on the

clutch housing and looking in you will see a scribed line on the surface. These marks

will be also used for setting the ignition timing. You may have to rock the engine as

prescribed above about 25MM either way to accurately align the line with the associated


14. So if you’re setting the IGNITION timing, you MUST use the timing marks on the

flywheel, but if you’re just setting the valve clearances Nos 1-12 will suffice. Please note

that each cylinder will have its own marks (2) on the flywheel for both ignition and tdc,

you cannot use ONE set of marks for BOTH cylinders. The two marks per cylinder

scribed on the flywheel will be within 30MM or so to each other. If you rotate the engine

the way it runs (via fourth gear) the timing mark that appears first will be for IGNITION

ሳቢ ጽሑፎች

እንደ መለያ ተሰጥተዋቸዋል:

ምድብ ውስጥ ሌሎች ጽሑፎች "Moto Guzzi":

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