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Posted

Uh oh. Turning into a Norton thread.

 

 

 

You don't have to go inside a Commando engine to see the parts, wait long enough and they will come out to see you.

 

Bought my Commando new in '72. Rode home and noticed the rear indicator bracket had snapped off. A week later the centre stand snapped. Mains failed at 3,000 miles. Advance and retard at 5,000 which went to full retard and turned the downpipes bright red, not a problem as one then snapped a while later so needed changing anyways. Zener diode failure and boiled battery. The disc pads are not really held in too well, when the pad wears down you find the backing plate is the same thickness as the gap between the disc and the caliper so it flies out in front of you. Does alert you to the brake failure, what a cunning design. Oh, oil tank lower mount cracks through dumping all oil onto rear wheel, carb float bowl screws fall out...... Actually I love the bike and still have it today after 46 years, although safely in bits in the shed.

 Love it. If a Commando owner ever suggests you go touring together politely decline unless love roadside rebuilds more than riding:)

The Combat engines were the worst, hand grenades. Superblend main bearings and gearbox needle bearing conversion helps.  

 

Ciao 

  • Like 1
Posted

 Love it. If a Commando owner ever suggests you go touring together politely decline unless love roadside rebuilds more than riding:)

 

 

The Combat engines were the worst, hand grenades. Superblend main bearings and gearbox needle bearing conversion helps.  

 

Ciao 

 

 

Overrevving (easy to do with the 2S cam) was the demise of the Combat. Treat them fairly and they won't blow.

 

I don't know what you mean about the gearbox needle bearing, I believe you mean the roller bearing conversion (although higher quality ball bearings work better) on the mainshaft? That was not Combat specific, the blame has traditionally be placed on Portuguese source ball bearings and affected only some bikes, more likely then 850s.

Posted

You are right, mine is a Combat engine.

There are two problems with that engine.

To increase the compression they just skimmed the cylinder head but they did not alter the pushrod lengths so the geometry changed increasing side load on the valve stem, cured by shortening the rods.

The main bearing problem came about due to fitting roller bearings on both sides of the crank rather than the earlier roller and ball bearing set up. At max revs the crank flexes and so the edges of the rollers dig in and fail. The Superblend bearings are slightly barrel shaped so no sharp edge.

Any other manufacturer would have tried to stop the crank flexing! Of course this was the 1970's when British manufacturers sold you what they could make cheap rather than what you wanted. Think of the number of Brit built 'US spec' bikes that we lusted after but could not buy in the UK.

Posted

To get back on the V11......

 

Finally reflashed my Scura. The Scura is offically mighty however like any Italian bike soon the electrics will need to be resorted ( meaning rip out the Italian "thatll do let's get lunch) electrics and fully modernize it. Right now it's the rear light fixture . Victim of the v twin vibes. Ill be going full LED soon . Right now it's just the head and tail lights. Then Ill start the Lemans. Mechanically theyre as solid as they'd ever been.

The v11 has always been my bucket list bike and now I have 2. Between those and the Triumph t595 And t509 since I saw Mission Impossible 2....lol

Posted

99.999  pct. of electrical wiring issues is at the connection . IDK if I would tear out anything . 

  • Like 1
  • 2 weeks later...
Posted

e2cb0b9d4d183d3d05b83621c00596c9.jpg

 

Went over to my buddy’s house to see him start his bike for the first time.

 

Meanwhile in the parking lot I caught a photo of these two V-twins.

 

 

Sent from my iPad using Tapatalk

  • Like 2
Posted

I wonder if the Guzzi employee that came up with the lime green was drinking Mountain Dew when he decided to submit that color to the higher ups..... Hmmmmm

Posted

I wonder if the Guzzi employee that came up with the lime green was drinking Mountain Dew when he decided to submit that color to the higher ups..... Hmmmmm

Well, considering the green came from the original V7 Sport back around 1970 it was probably something a lot stronger than Mt. Dew.

 

 

Sent from my iPhone using Tapatalk

Posted

Seems they electrified the modern version of that color. I'd love to see the original green V7 Sport sitting next to the Greenie V11. :food:

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