Moto Guzzi Le Mans Mk 1 Restoration » » mHpi4pHDpJw

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Moto Guzzi Le Mans 850

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Moto Guzzi Le Mans Mk 1 Restoration This video shows the 14 month Tear down phase of the Moto Guzzi Le Mans Mk 1 from 1978.

It is an 850cc Air cooled V twin – The bike is a push rod motor with two valves per cylinder. The flywheel and Ring Gear weigh approx 7.5kg. It is shaft drive, The bike has linked Brembo disc brakes, the three calipers are all ‘single pot.’

I got hold of the bike approx 3 years ago taking the first photo at mid day on the 12th of October 2008.

I was 19 and the bike had spent the last 20 years laying untouched in an old shed. collecting dust and going rotten.

It was my fathers old bike and he had got it second hand in late 1979 with 1500 miles on the clock. He was looking for a bike to do some long distance touring on, and preferred Guzzis to BMWs due to the better braking in the wet. he thrashed the bike every day of the year for 10 years doing approx 100,000 miles on the bike, all over Europe in rain and shine without ever really needing to do much work to it.

However eventually the bike gave up, needing new big end shells and new gear box change spring.

As I was just starting engineering at university I needed some good transport and having just passed my test, the guzzi fitted the bill. A bit of a restoration project and a cool bike.

Moto Guzzi Le Mans 850


This video shows the brake down phase of the restoration, 14 months hard work, the more the bike was taken apart the worse it got, everything that could rust was, everything that could rot had, and everything was seized, pistons, carbs, calipers. The Lot!

The exhaust valves were either cracked or chipped, the piston rings were missing, the big ends were ruined, the valve seats and guides were worn almost totally away, the valve springs and clutch springs were out of tolerance, the oil seals leaked, the tires had gone hard, the battery was finished, the fork seals leaked the cables had all worn, the rubber pipes had gone brittle and cracked the rear dampers were ruined, the down pipes, and entire exhaust was rotten the breather box, steering damper, rear indicators, drive shaft, small end bushes, brake lines, screen, front mud guard, left rear view mirror, horn, HT leads, plugs, brake fluid, gearbox oil, engine oil and brake master cylinders, all needed to be fixed or needed replacing. Many bits were manufactured from EN58J stainless steel by my father ‘In House’ ensuring that this bike never goes rusty again, and I got the little bits which he couldn’t make.

As the video goes through, you get the chance to see actually what a bad state the old bike was in.

As of October 2010 the bike is now back together in one piece (minus the carb rebuild) and almost rebuilt, realistically we hope to have the bike running by new year. The starter motor turned the engine over for the first time last weekend, and I sat on it for the first time ever this weekend. Moto Guzzi Le Mans Mk 1 Restoration

Moto Guzzi Le Mans 850
Moto Guzzi Le Mans 850

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