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Re: 850 MkI engine plate break [Re: L.A.B.] #765016
02/10/19 12:30 am
02/10/19 12:30 am
Joined: Dec 2007
Posts: 136
Mid -Coast Maine & SoCal - US
Robert Dentico Online content OP

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Robert Dentico  Online Content OP

BritBike Forum member

Joined: Dec 2007
Posts: 136
Mid -Coast Maine & SoCal - US
Originally Posted by L.A.B.



Actual Mk3 vernier Iso. kit (requires modification of the pre-Mk3 front Iso. mount tube)?

Or, pre-Mk3 vernier Iso. conversion kit (mount tube doesn't require machining)?

https://andover-norton.co.uk/en/shop-drawing/136/engine-mountings-spring-head-steady-
Items 2 - 9.

However, you might want to consider fitting one of the head steady upgrades (Taylor, CnW, OldBritts, Norvil, etc.).



The drop in Mk III Conversion Kit.


So the Spring Head Steady will work with the OEM Head Steady Mounts...? Nice, I'll ask Bryan if he wants to go with that mod. Those other units look great.


Thanks,
Rob


"They told me I was gonna have to work for a livin' but all I wanna do is Ride" - Jackson Browne

Current:
'75 T-160 Trident, '78 T-140 Bonneville, '13 Electra Glide, a garage full of Guzzis, '88 Honda Hawk GT, '84 RZ350 KR, 1991 BMW R 100 RT, 1969 Dalesman Trials etc and a '73 MGB for good measure... smile
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Re: 850 MkI engine plate break [Re: Robert Dentico] #765036
02/10/19 10:39 am
02/10/19 10:39 am
Joined: Dec 2004
Posts: 9,796
Scotland
kommando Offline
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kommando  Offline
BritBike Forum member

Joined: Dec 2004
Posts: 9,796
Scotland
Quote
So the Spring Head Steady will work with the OEM Head Steady Mounts...?


Yes, you only need to drill 2 holes in the front of the existing box head steady, they are not on the center of the steady however but offset as the engine is offset to the center line by 1/8" so you drill the 2 holes 1/8" to the right.

https://www.motorcycleclassics.com/mc-how-to/norton-upgrade-mkiii-head-steady

Re: 850 MkI engine plate break [Re: kommando] #765040
02/10/19 1:07 pm
02/10/19 1:07 pm
Joined: Dec 2007
Posts: 136
Mid -Coast Maine & SoCal - US
Robert Dentico Online content OP

BritBike Forum member
Robert Dentico  Online Content OP

BritBike Forum member

Joined: Dec 2007
Posts: 136
Mid -Coast Maine & SoCal - US
Originally Posted by kommando
Quote
So the Spring Head Steady will work with the OEM Head Steady Mounts...?


Yes, you only need to drill 2 holes in the front of the existing box head steady, they are not on the center of the steady however but offset as the engine is offset to the center line by 1/8" so you drill the 2 holes 1/8" to the right.

https://www.motorcycleclassics.com/mc-how-to/norton-upgrade-mkiii-head-steady



Perfect.


I will encourage Bryan to go with the Spring Mod. I assume that the photo on their site omitted the coils for the sake of clarity..? To better illustrate the saddle type bracket up on the lower frame rail.


I would like to see a shot of the Andover Race Style Assy. installed also. Again assuming that replaces the OEM...?

I have an additional issue which I may have mentioned previously in that the existing Upper Mount holes are stripped and that will need to be addressed whether Heli-Coils or some type of reworking...


Great info, thanks much,


Best,
Rob


"They told me I was gonna have to work for a livin' but all I wanna do is Ride" - Jackson Browne

Current:
'75 T-160 Trident, '78 T-140 Bonneville, '13 Electra Glide, a garage full of Guzzis, '88 Honda Hawk GT, '84 RZ350 KR, 1991 BMW R 100 RT, 1969 Dalesman Trials etc and a '73 MGB for good measure... smile
Re: 850 MkI engine plate break [Re: Robert Dentico] #765042
02/10/19 1:18 pm
02/10/19 1:18 pm
Joined: Dec 2004
Posts: 9,796
Scotland
kommando Offline
BritBike Forum member
kommando  Offline
BritBike Forum member

Joined: Dec 2004
Posts: 9,796
Scotland
Springs are in place in the final photo.

[Linked Image]


Re: 850 MkI engine plate break [Re: Robert Dentico] #765043
02/10/19 1:25 pm
02/10/19 1:25 pm
Joined: Mar 2006
Posts: 3,894
Norfolk, UK
L.A.B. Online content
BritBike Forum member
L.A.B.  Online Content
BritBike Forum member

Joined: Mar 2006
Posts: 3,894
Norfolk, UK
Originally Posted by Robert Dentico
I assume that the photo on their site omitted the coils for the sake of clarity..? To better illustrate the saddle type bracket up on the lower frame rail.


Ignition coils? Yes, it all fits with the standard coils.


Originally Posted by Robert Dentico
I would like to see a shot of the Andover Race Style Assy. installed also. Again assuming that replaces the OEM...?


[Linked Image]



Originally Posted by Robert Dentico
I have an additional issue which I may have mentioned previously in that the existing Upper Mount holes are stripped and that will need to be addressed whether Heli-Coils or some type of reworking...


The Taylor head steady doesn't use the original threaded frame mounts.

[Linked Image]


Last edited by L.A.B.; 02/10/19 1:26 pm.
Re: 850 MkI engine plate break [Re: L.A.B.] #765085
02/10/19 11:51 pm
02/10/19 11:51 pm
Joined: Dec 2007
Posts: 136
Mid -Coast Maine & SoCal - US
Robert Dentico Online content OP

BritBike Forum member
Robert Dentico  Online Content OP

BritBike Forum member

Joined: Dec 2007
Posts: 136
Mid -Coast Maine & SoCal - US
Originally Posted by L.A.B.


The Taylor head steady doesn't use the original threaded frame mounts.




That would solve the repair problem that I have currently. I like it.

Still not certain how I am going to accomplish that. The left side is still in the frame, part of the rubber sheared off and the internal stub in the threaded boss and frozen tight. The other side has the internal threads stripped and I could Heli-Coil that side.
Probably end up drill out the left side from the right side.

Thanks,
Rob


"They told me I was gonna have to work for a livin' but all I wanna do is Ride" - Jackson Browne

Current:
'75 T-160 Trident, '78 T-140 Bonneville, '13 Electra Glide, a garage full of Guzzis, '88 Honda Hawk GT, '84 RZ350 KR, 1991 BMW R 100 RT, 1969 Dalesman Trials etc and a '73 MGB for good measure... smile
Re: 850 MkI engine plate break [Re: Robert Dentico] #765086
02/11/19 12:22 am
02/11/19 12:22 am
Joined: Mar 2006
Posts: 3,894
Norfolk, UK
L.A.B. Online content
BritBike Forum member
L.A.B.  Online Content
BritBike Forum member

Joined: Mar 2006
Posts: 3,894
Norfolk, UK
Originally Posted by Robert Dentico
The left side is still in the frame, part of the rubber sheared off and the internal stub in the threaded boss and frozen tight.



Heat?

Cut the remaining rubber off the mount to reduce smoke/stink/fumes.

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