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Best way to fit motor in frame?

 
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Hortons Norton



Joined: 12 Oct 2007
Posts: 162
Location: Long Beach, California

PostPosted: Thu Aug 14, 2008 8:40 am    Post subject: Best way to fit motor in frame? Reply with quote

I have my frame, swingarm and engine cradle back from the powder coater and should be getting my engine back real soon. My question is what would be the safest way to put the engine back in without scratching the frame? I may be doing this myself. Should the motor mounts be attached to the motor first or the frame? And thanks in advance for any tips, Chuck. Very Happy
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Ron L



Joined: 27 Feb 2004
Posts: 1147
Location: Ohio

PostPosted: Thu Aug 14, 2008 9:24 am    Post subject: Reply with quote

If you are doing this alone, the only way is to wrap the frame tubes (pipe insulation works well) and with the engine/cradle assembly on its side and elevated on two inch blocks, fit the frame (26 lbs) over the engine. Slide the rear mount stud through and then fit the front mount.

Turn the engine and frame upright and complete the assembly of the rear mount. At this stage you can attach the swing arm to the cradle.

Trying to manhandle the engine/trans lump into the frame will result in chasing it accross the floor and a high risk of scratching that new paint.

If the forks and front wheel are still on the frame, two people can fit the engine assembly to the frame, but with a bare frame it is much easier to fit the frame to engine assembly.
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Hortons Norton



Joined: 12 Oct 2007
Posts: 162
Location: Long Beach, California

PostPosted: Thu Aug 14, 2008 1:06 pm    Post subject: Reply with quote

Should the transmission also be put in the cradle before the motor or can it be put in later? It's a 72 Combat. I thought I heard it was a bit of a task with the motor already in. Thanks again Ron for your advice, Chuck. Smile
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marinatlas



Joined: 04 Nov 2007
Posts: 42
Location: France-St malo

PostPosted: Fri Aug 15, 2008 2:06 am    Post subject: Reply with quote

Hi there, personnaly I lay the engine on the floor on timing side , and fit the frame with its craddle and gearbox around, I found it more easier when alone, the floor was covered with carboard , to protect the paint.You must fit the gearbox into before, no way to fit it after , unless moving the engine inside the plates........my two cents.Pierre
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grandpaul



Joined: 15 Jan 2008
Posts: 652
Location: Laredo (south) Texas

PostPosted: Sat Aug 16, 2008 7:09 pm    Post subject: Reply with quote

Yes, install the tranny first, it's a BIG headache otherwise.
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Hortons Norton



Joined: 12 Oct 2007
Posts: 162
Location: Long Beach, California

PostPosted: Tue Aug 19, 2008 6:35 am    Post subject: Reply with quote

Thanks guys, Is it the MK III cradle that you can remove the transmission without undoing the motor? Or do you need to modify the cradle on it to do this? For some reason I thought I heard something like that? But I will install it first, Have a great day and thanks again. Chuck.
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Dr_Hiller



Joined: 09 Oct 2004
Posts: 159
Location: Seattle, WA USA

PostPosted: Tue Aug 19, 2008 11:06 am    Post subject: Reply with quote

I sure hope the gearbox can be installed after the engine, as I've had to do it three times since getting my bike back together.

I do, however, have a MkIII cradle and swingarm.

I think I've successfully suppressed the memory of fitting my engine, though I believe I had the front Iso installed, head off and just lifted through the frame. My lower back twinged when I wrote that, so I must be getting close to the truth.
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debby



Joined: 15 Apr 2004
Posts: 898
Location: Boulder, CO

PostPosted: Tue Aug 19, 2008 12:14 pm    Post subject: Reply with quote

Doesn't quite fit on the pre-MKIII models. I had the cradle modified on my Mk2 850 so it does fit.

As for installing the engine, my favorite method is to get a couple of strong guy friends to do it for me! Cool

Debby
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Hortons Norton



Joined: 12 Oct 2007
Posts: 162
Location: Long Beach, California

PostPosted: Tue Aug 19, 2008 2:34 pm    Post subject: Reply with quote

Thanks Dr_Hiller and Debby, So I have a game plan now. It's good to know that if the trans has to come out of the 75 I can do it without moving the engine. I hope the 72 won't need to come out for some time as it will have all new gears, bearings, main shaft and bushings. Oh and if anyone was wondering Beltdriveman is still around and doing fine, I didn't want to start a post just for that info but it was cool to hear, Kinda made my day, Chuck. Very Happy
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The Unapproachable Norton Commando

At the end of 1967 the Norton Commando was announced.

The Norton Commando was greeted with a certain amount of scepticism because on first sight the commando appeared to comprise of the old Norton Dominator twin cylinder engine mounted at an inclined angle in a set of new cylinder parts.

It was not realized that the new Norton Commando Isolastic method of engine suspension damped out all engine vibration and produced a machine which had uncanny smoothness for a vertical twin. In due course the critics were silenced and the Norton Commando had the distinction of being regarded as the first of todays so called superbikes. There can be little doubt that the original design concept of the Norton Commando has proved correct, since comparatively few modifications of any real consequence have been made since production commenced during 1968.

Now nearly 40 years later Norton Commando riders like us are a breed of our own, and as far as we are concerned its still more fun to go for a blat on the old Norton Commando, and fast. As a Norton Commando owner and enthusiast, my goal here is to promote and give credit to those who keep the Norton name going.

It is more deserving to give credit to the Commando itself, for after all these years it continues to be respected. The original Commando designers like John Favill are those who deserve the credit for developing this incredible motorcycle.

The Norton Commando Roadster and Interstate of the late seventies, never died. Although the Norton Villiers factory dispersed the tradition lived on. Today Kenny Dreer in the USA is developing the new 952 CC Norton. What a great looking bike this is, and its engineering is still based on the original layout. It will be interesting to see how the new 952CC Norton does in todays tough motorcycle market. One thing is for sure, I would own one if I could afford it.