Recent Posts

1

General Discussion / Re: T-3 police bike

« Last post by John A on February 20, 2026, 10:50:32 PM »

In ‘77 I found a place in Sacramento that rebuilt police Guzzi engines. They would sleeve the cylinders and recut the ring grooves to fit automotive rings. They did a lot of them and it worked very well. They went to production machining in ‘80 sadly. It was called Modern Iron.

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General Discussion / Re: Clutch adjustment T3

« Last post by guzzisteve on February 20, 2026, 10:20:58 PM »

They make a longer piece for behind throw out bearing to contact lever with 2 orings on it. Would that help?

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General Discussion / Re: T-3 police bike

« Last post by Antietam Classic Cycle on February 20, 2026, 09:50:55 PM »

Mine is a 75 and was a police bike. It had chrome bores. Maybe late in the production run police may of had iron? Anything is possible with Guzzi.

BTW if you are planning to use the police dash do yourself a big favor and put LED lights into those little light bars. Stock they are impossible to see come on in the daytime and not much better at night. You can get what you need here.
superbrightleds.com/?utm_campaign=400_tROAS-Pmax&utm_source=google&utm_medium=cpc&utm_term=&gad_source=1&gad_campaignid=20273546574&gclid=Cj0KCQiAqeDMBhDcARIsAJEbU9QUbjwMExtbyVtQnpFK8yYNpKkdSbCAIMndjp0Js2tkfe37JPAXuzsaAqUUEALw_wcB

Also even though they are a "police" dash don't expect the speedometer to be any more accurate than any other Velga. If mine is showing 60 I am doing 51. For a while there I sure thought it could hit a 100 easily. 

The speedo on my Convert is 3 mph off at all speeds. Never had a Guzzi that was more than 5 off, except the old '69 Ambo - that needle wags like a dog's tail.

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General Discussion / Re: T-3 police bike

« Last post by Antietam Classic Cycle on February 20, 2026, 09:47:43 PM »

The headgasket showed the leak as well, plus the carbon build up showed it was burning plenty of oil. You can see the polished finish in the cylinder. In your opinion I’m better off just getting new Nikasil cylinders?

Yes.

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General Discussion / Re: T-3 police bike

« Last post by Gliderjohn on February 20, 2026, 08:56:53 PM »

Mine is a 75 and was a police bike. It had chrome bores. Maybe late in the production run police may of had iron? Anything is possible with Guzzi.

BTW if you are planning to use the police dash do yourself a big favor and put LED lights into those little light bars. Stock they are impossible to see come on in the daytime and not much better at night. You can get what you need here.
superbrightleds.com/?utm_campaign=400_tROAS-Pmax&utm_source=google&utm_medium=cpc&utm_term=&gad_source=1&gad_campaignid=20273546574&gclid=Cj0KCQiAqeDMBhDcARIsAJEbU9QUbjwMExtbyVtQnpFK8yYNpKkdSbCAIMndjp0Js2tkfe37JPAXuzsaAqUUEALw_wcB

Also even though they are a "police" dash don't expect the speedometer to be any more accurate than any other Velga. If mine is showing 60 I am doing 51. For a while there I sure thought it could hit a 100 easily. 

6

General Discussion / Re: T-3 police bike

« Last post by johnwesley on February 20, 2026, 08:55:33 PM »

Look like the 89s to me. I've seen them crack the liner where that dark spot is near the left pushrod hole. You can see that the head gasket wasn't sealing properly around the pushrod tunnels.

The headgasket showed the leak as well, plus the carbon build up showed it was burning plenty of oil. You can see the polished finish in the cylinder. In your opinion I’m better off just getting new Nikasil cylinders?

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General Discussion / Re: T-3 police bike

« Last post by Antietam Classic Cycle on February 20, 2026, 08:46:20 PM »

You’re probably right, I did a quick measurement and could be a mm off. Here is a pic of the cylinder

Look like the 89s to me. I've seen them crack the liner where that dark spot is near the left pushrod hole. You can see that the head gasket wasn't sealing properly around the pushrod tunnels.

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General Discussion / Clutch adjustment T3

« Last post by bobra5037 on February 20, 2026, 08:01:22 PM »

G'day all

I'm trying to adjust the clutch on my T3 and am circling the drain plug of confusion.  If I attempt to adjust the screw "B" at the back of the gearbox as per the service manual specs (65mm between the claw and the rear of the gearbox "C"), the back of the claw contacts the pivot arm for the foot brake.  If I back out the screw, it fouls on the bike frame.  There seems to be no happy medium so my assumption is that I've got the whole process wrong.   I have disconnected the clutch cable - is this the right process?

OK - a post-posting revelation!  Obviously, regardless of the position of the set screw "B", the spring will always push the arm back so the claw contacts the foot brake pivot (Unless the screw hits the frame first).  So, how do you measure the 65mm clearance?  Should this be with the spring compressed? (ie simulating the clutch lever being pulled). 

Any advice please?

Thanks

Rob

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General Discussion / Re: T-3 police bike

« Last post by johnwesley on February 20, 2026, 07:51:57 PM »

89 mm means they're likely Venolia pistons, that was the piston commonly used when the bore was that diameter. Head gaskets can be an issue (I used custom-made copper ones on a customer's bike), and on that bike the liner o.d. was large enough that when the alloy cylinder casting was bored for them, the pushrod tunnel was breached. Not optimal...

You might check with Harper's for rings, barring that Venolia themselves.

You’re probably right, I did a quick measurement and could be a mm off. Here is a pic of the cylinder

10

General Discussion / Re: 2002 California - valve noise. Could it be something worse than just adjusting?

« Last post by WhiteMountainsV85TT on February 20, 2026, 07:34:49 PM »

I got the ok from my better half to add to the stable (V100, 87 R80, DR650).  Will check it out tomorrow (snow?) Plan to take a video and post it.
I'll put a deposit and see what you all think. Much appreciated!
Ray