SR1 mag

Information relating to the Matchless G3 or AJS Model 16 350cc Heavyweight
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clive
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Re: SR1 mag

Post by clive »

and the auto advance unit under the bump!
clive
if it ain't broke don't fix
Liddle
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Location: Lothian UK

Re: SR1 mag

Post by Liddle »

Hi there, yes it has a bump in timing chain case ,and I could rotate the points cam and it will spring back.
Is losing the spark when hot common?
Seems like I have a right mongrel , a matchless frame the dating officer does not have records for, an AJS engine that's got the wrong magneto, I wonder what's next,and if it's worth saving.
SPRIDDLER
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Re: SR1 mag

Post by SPRIDDLER »

Liddle wrote: Mon Jun 07, 2021 7:26 pm
Is losing the spark when hot common?
Old condensers can break down and fail when the mag gets warmed up/hot leaving you at the roadside until the mag cools down when hopefully it will run for another 5 minutes then stop again, then cool down, start for another 5 minutes then cut out...........(repeat as necessary to get home).
The good news about your SR1 mag is that it's easy to replace the condenser with an Easycap modification from Brightspark Magnetos. If you had the 'correct' N1 magneto it would be a specialist job.
Seems like I have a right mongrel , a matchless frame the dating officer does not have records for, an AJS engine that's got the wrong magneto, I wonder what's next and if it's worth saving.
Definitely worth saving.
If you put the frame number on here we may be able to find that it falls within the series of frame numbers shown in Bacon's restoration book. While you're at it put put the engine year in your Profile as it will save having to hunt through your previous posts to find the info when replying at a later date.
A pic or two of your mongrel would help with providing tips for recommissioning and any future questions you may have as, just for one example it may have a different carb than the one for the frame's or the engine's year.

BTW - you mentioned earlier that you needed to get a new plug cap so get one without a suppressor (resistor) as magnetos don't like caps with suppressors.
'There is a tide in the affairs of men
Which taken at the flood............'
Liddle
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Location: Lothian UK

Re: SR1 mag

Post by Liddle »

Hi Spriddler,
frame number is 76139 it was part of war department contract S6150 early 1944.
I need dating certificate as although the bike has a reg number, its not on DVLA computer and I do not have any paperwork whatsoever. I have not worked out how to post a photo yet.
I have changed the oil and poured some oil in the tapit cover, and turned engine over , started first kick.sound nice oil return to tank.
SPRIDDLER
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Re: SR1 mag

Post by SPRIDDLER »

Liddle wrote: Tue Jun 08, 2021 12:44 am frame number is 76139 it was part of war department contract S6150 early 1944.
Hmm. I hadn't appreciated that it is a WD contract frame. I know very little about dating WD frames.
I need dating certificate as although the bike has a reg number, its not on DVLA computer and I do not have any paperwork whatsoever.
It is most unlikely (virtually impossible) that you will be able to reclaim the reg no. that you already have without having evidence that links the frame no. to the reg'n no. This would be an original bill of sale, buff log book, MOT cert etc., none of which you have. I know of only one case where an orig no. was reclaimed without those documents. A local chap restored his grandfather's 1939 bike, after it had sat rusting in a collapsed shed for 25+ years and it took more than a year of haggling and a whole dossier of old letters and photos. The story was written up in a Jampot mag last year.
The best you can hope for is an age-related number. I guess you are aware of the club's Dating Service here:

https://www.jampot.com/Dating.asp

Glad you've got it running!
'There is a tide in the affairs of men
Which taken at the flood............'
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clive
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Re: SR1 mag

Post by clive »

Liddle wrote: Mon Jun 07, 2021 7:26 pm
Seems like I have a right mongrel , a matchless frame the dating officer does not have records for, an AJS engine that's got the wrong magneto, I wonder what's next,and if it's worth saving.
Re frame your thinking, its not a mongrel its a special. This means you can add things like indicators without feeling guilty. Although it may not be worth quite as much as a matching numbers all original bike its a good way in to owning an historic vehicle and will always command some value, so yes its worth saving.
clive
if it ain't broke don't fix
SPRIDDLER
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Re: SR1 mag

Post by SPRIDDLER »

Here's an extract from Bacon's restoration guide with regard to frame numbers for road and comp models but since yours is a WD frame (?) and it seems that the club doesn't hold factory records for those it won't tell you any more than you already know. i.e. that it's from an MOD contract. From my very superficial knowledge of MOD bikes I believe that throughout the war all MOD contract bikes (their frames and their original engines) were dated as 1941 regardless of the year in which they were actually manufactured.
Frame numbers.JPG
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'There is a tide in the affairs of men
Which taken at the flood............'
Liddle
Posts: 10
Joined: Fri Jun 04, 2021 12:30 pm
Location: Lothian UK

Re: SR1 mag

Post by Liddle »

Hi there,
thanks for all the advice .For anyone who like me ended up with a ex mod bike ,the Military Vehicles Trust, were very good and quickly confirmed the bikes identity and issued a dating certificate. So it's all in the post to the DVLA ,one waits with anticipation, might even get it on the road before winter.
Liddle
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Joined: Fri Jun 04, 2021 12:30 pm
Location: Lothian UK

Re: SR1 mag

Post by Liddle »

Hi , I am trying to post picture, hope this works.
my 1944 matchless.
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56G80S
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Re: SR1 mag

Post by 56G80S »

It looks better than mine as it is - just ride it.

I've found the SR1 to be a good mag.

Johnny B
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