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Technical Discussion Forum / Re: cylinder head gasket
« Last post by singleminded on August 20, 2018, 10:34:16 PM »
Certainly on the earlier bikes like my 9A there is only 1 gasket and that is the paper cylinder base gasket, and yeas grind the faces in.
  john
2
Technical Discussion Forum / Re: Rocker arm has moved
« Last post by singleminded on August 20, 2018, 10:33:00 PM »
The only thing that I can think of is that the 2 keys at the removable end of the rocker have sheared..the rocker arm at the nut end is fitted on a tapered and keyed shaft..if you slacken the nut so that it is flush with the end of the thread and the using a soft drift( copper or soft brass, maybe aluminium) with the rocker box supported tap the rocker shaft in against the casting to release the taper..You need to be careful as finding another rocker box will be almost impossible..John
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Technical Discussion Forum / Rocker arm has moved
« Last post by Steve_M90 on August 20, 2018, 09:34:55 PM »
On the exhaust valve, the tappet pin cannot be adjusted to be close to the valve stem. On disassembling the rocker box it is clear that one of the arms has moved on the shaft. The photographs show the arm in both extreme positions - you can see the angles are different between inlet and exhaust. The "input" end has a nut on it. The spares book implies there is a key in this end. The "output" end, the arm seems to be held in place by a screw. Nothing seems to be loose.

Has anyone taken the arms off the shaft? Should I be able to undo either the nut or the screw? Clearly one of them needs to be removed to remove the shaft from the box.

Advice welcome.

Steve
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Technical Discussion Forum / cylinder head gasket
« Last post by rosie sunbeam on August 20, 2018, 04:22:34 PM »
Hello i am hoping you can answer my question, when i striped my 350cc sunbeam engine of my mod 8 series 2 1937 there was no head gasket i have no idea if there should be one or not or perhaps it should just be lapped in i have no idea many thanks for your help in this matter,

Terry .
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EVENTS / Re: MEETING AT BREEDON-ON-THE-HILL SUNDAY 12TH AUGUST 2018
« Last post by VicYouel on August 09, 2018, 09:09:12 AM »
Nick,
Might be worth posting on Facebook as well, although that has become rather dormant and perhaps get Paul to send a club email? And also the new VMCC forum.
Anyway, good to see the initiative and hope it goes well.
Vic
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EVENTS / MEETING AT BREEDON-ON-THE-HILL SUNDAY 12TH AUGUST 2018
« Last post by m90 on August 09, 2018, 12:13:56 AM »
Phil Nutt and I have called a meeting for Marston Sunbeam riders and their bikes on Sunday 12th August at Breedon-on-the-Hill at 11 am.  It's just down the road from East Midlands Airport and Donington Park so it's accessible for Derbys, Notts, Staffs and Leicestershire - but all welcome!

We shall meet at Beth's Kitchen which is on the old main road (it was the old A453),  on the left as you come into Breedon from Ashby. The cafe does traditional homemade food and seems to be a focal point for local cycling clubs. There is also a gift shop, and a large car park.

If you're interested in a meeting in this area but can't make it on Sunday, could you contact me anyway (my details are in Beaming)

Nick Shelley
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Historical Discusions / Re: Original tail light?
« Last post by Thomas on August 04, 2018, 10:11:16 PM »
I don't expect any trouble here. The original light bracket had the same material thickness and was fine for more than 80 years. If it really breaks I will report here.  ;D
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Historical Discusions / Re: Original tail light?
« Last post by kbryt on August 04, 2018, 08:55:47 PM »
Not just the screws to worry about the bends are the weak spot.
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Historical Discusions / Re: Original tail light?
« Last post by Thomas on August 04, 2018, 08:52:44 PM »
Yes, that's why I applied Loctide to all the screws.  :)
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Historical Discusions / Re: Original tail light?
« Last post by kbryt on August 04, 2018, 08:41:00 PM »
Looks like  a neat job, just watch out for vibration stress, vibrations always seem to concentrate at the rear end of the bike.
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