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Re: I just bought a Gold Star [Re: TrophyTR6] #769456 03/28/19 8:35 am
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TrophyTR6 Offline OP
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Thank you very much everyone!!

@John. Thank you for your observations. The answer is yes to most of the things you pointed out. I did not know about the kickstart cotter pin and I hadn't noticed I got the wrong front torque stay. I googled the part number and I now realize it should be straight. When the previous owner bought the bike it was built as a track racer and I believe he made a lot of the parts himself when he restored it in early 2000. I have no side stand and the frame lug is removed, my guess is that this was done in its racing days as well.

Cheers
Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
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Re: I just bought a Gold Star [Re: TrophyTR6] #769477 03/28/19 3:26 pm
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Gordo in Comox Offline
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Chris

Fantastic looking machine. I am curious as to which speedometer 'driven gear' you installed in the gearbox and have you calculated the speedometer head ratio you need with that 19 tooth sprocket?

Gordo


The roadside repairs make for the best post ride stories.
Re: I just bought a Gold Star [Re: TrophyTR6] #769482 03/28/19 5:20 pm
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TrophyTR6 Offline OP
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Gordo! None of the gears were present when I bought the bike. Previous owner had installed a smiths gearbox on the rear wheel. I ordered both driving gear and driven gear from Auto Cycle in the UK. According to them you used the same speedometer gears for a SCT gearbox as a RRT. But no, I haven’t calculated anything :-) In this case I trusted Auto Cycle

Cheers
Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #769485 03/28/19 5:41 pm
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Gordo in Comox Offline
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Chris: Thanks. Now you have confused me as the photos of your gearbox show both the driving gear on the layshaft and the driven gear in the outer cover. Are those gears not usable?

Gordo


The roadside repairs make for the best post ride stories.
Re: I just bought a Gold Star [Re: Gordo in Comox] #769489 03/28/19 6:18 pm
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TrophyTR6 Offline OP
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Gordo: The gears in the photos are my new ones(Part number 42-3033 driving and 42-3032 driven.). The driving gear on the Layshaft were broken and the driven gear was missing when I bought the bike.


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #769490 03/28/19 6:30 pm
Joined: Sep 2001
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Gordo in Comox Offline
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Chris: Thanks. I miss read your comment about ordering. The reason for my original question was that I plan to use the same type gearbox (SCT) for a road machine and figured I would need a speedo ratio from about 1309 up to about 1343 depending on which tire I used. I was curious to see what ratio you were going to use.

Gordo


The roadside repairs make for the best post ride stories.
Re: I just bought a Gold Star [Re: TrophyTR6] #769530 03/29/19 8:13 am
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TrophyTR6 Offline OP
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Gordo: Sorry I won't be of any help with this. Im still quite new at restoring bikes and especially old British ones. Calculating ratios aren't even in my vocabulary right now smile Step one will be to see if the speedo moves at all, after that I will tackle any potential problems.

Cheers
Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #769549 03/29/19 4:36 pm
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bsalloyd Offline
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I am guessing you are probably past this point at the present. I noticed in your pictures of outer side of the inner transmission cover the selector fork was out of position. There is a dimple in the selector fork and a dimple in the cover that aligns them correctly with the gears in the neutral position. Hopefully your corrected this before installing the outer cover.


1951 ZB GS
1953 BB GS
1953 Super Flash
1954 Vincent BS
1963 RGS
1956 Triumph T110

Re: I just bought a Gold Star [Re: TrophyTR6] #769616 03/30/19 7:32 am
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TrophyTR6 Offline OP
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bsalloyd: Don’t think that photo was taken during the indexing but later in the process when I already had shifted up and down a couple of times. Everything is working as it should,

Cheers
Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #769635 03/30/19 4:30 pm
Joined: Feb 2012
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Kerry W Offline
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Just a note for other builds - as many have found, I think (myself included) if the reverse cam-plate is used, the dimple alignment method doesn't work for the selector mechanism setup.

Despite the clipons/rearsets in the photos, it looks like the bike will have the standard cam-plate and an 'up for up' gear change pattern, so the textbook (dimple) sector setup will be correct in this case.


No generalisation is wholly true, not even this one.
Oliver Wendell Holmes
Re: I just bought a Gold Star [Re: TrophyTR6] #769816 04/01/19 12:59 pm
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NYBSAGUY Offline
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Beautiful work, Chris, congratulations.

With a question: Where did you get your braided steel oil lines?


1949 BSA ZB34 'Bitsa'
1959 BSA DBD34 Catalina
1973 Norton Commando 850 R
1974 Norton Commando 850 R (I know, one too many)
1975 Honda TL250 Trials, a new addition to the family
1998 Montesa Cota 315 HRC
2004 Ducati M1000ie
Re: I just bought a Gold Star [Re: TrophyTR6] #769855 04/01/19 7:56 pm
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chaterlea25 Online Content
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Hi Chris and NY
I noticed the oil pipes on Chris's bike are the "over the gearbox" version (these are shorter than the under version)
I thought that these were (usually) intended for the off road models, but do not know where this thought came from??????
Googling GS pictures shows a random mix of under and over oil pipes ?????

NY, Both types of oil pipes are readily available from the usual BSA parts suppliers or eBay

John

Re: I just bought a Gold Star [Re: TrophyTR6] #769864 04/01/19 9:56 pm
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NYBSAGUY Offline
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Thanks John,

Since mine is an off-roader, I planned to use the over-the-gearbox type.

I will start scouring the usual suppliers.

UG


1949 BSA ZB34 'Bitsa'
1959 BSA DBD34 Catalina
1973 Norton Commando 850 R
1974 Norton Commando 850 R (I know, one too many)
1975 Honda TL250 Trials, a new addition to the family
1998 Montesa Cota 315 HRC
2004 Ducati M1000ie
Re: I just bought a Gold Star [Re: TrophyTR6] #769882 04/02/19 7:14 am
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TrophyTR6 Offline OP
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Hello!

Kerry W: You are correct, I haven't used the reverse cam-plate. I opted for the one down and three up since I have a Triumph and an old Zundapp all using this shift pattern. I might change this in the future though since the threads in the gearbox casing for the plunger are very worn.

NYBSAGUY: Thank you! I bought the oil lines from draganfly.co.uk Seem to be OK quality,

chaterlea25: You are probably correct regarding the off-road type oil lines. I did a lot of googling and reading but don't think I found a definite answer. Even though I try to get the bike look original I always thought the "over the gearbox" oil lines looked best. Don't like the way they hang under there and the harch bend after the engine out/inlet.

Cheers Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #782318 08/23/19 12:06 pm
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TrophyTR6 Offline OP
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Long time since I last updated. The bike went through MOT this may with flying colours. First time in over ten years that the bike is road legal (I have only owned it for one year). I have only done 222miles so far, mainly because of a starting and running problem I got early on. It turned out to be a weak magneto and I therefore installed a Thorspark electronic ignition kit to get the bike on the road. The el ignition works a charm and I'm very happy with this affordable kit. Unfortunately, I have also been battling some charging and battery issues over the summer (NOT a good combination with electronic ignition). The most plausible cause at this point is that the batteries have broken due to vibration. The last time this happened I had to call a tow truck to get me and the bike home. I have now installed another brand of battery along with some vibration dampening and also fitted a DVR2 regulator to help charging. This winter I will send my magneto for restoration so I don't have to worry if my battery goes flat. I have also installed a Concentric 1036 instead of the GP. Not as pretty but I got tired of fouled plugs and I thought it would be easier to handle a Concentric until the engine break-in is done. Following Magneto-mans excellent threads on Concentric tuning I got my carb dialled in by his recommendation and it transformed the bike. I'll probably need a 30 idle jet and a 220 - 230 main jet but the bike now runs really well and it's so much stronger, especially at mid revs. The GP will probably go back on in the future


Here are some images of the bike a couple of days before MOT (Still missing fuel lines and brake cable). And further down are some images from the other day.

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #782319 08/23/19 12:06 pm
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TrophyTR6 Offline OP
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[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #782326 08/23/19 1:37 pm
Joined: Mar 2019
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Hugh Jorgen Offline
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A beauty!


1970 T120R
1970 Commando
Re: I just bought a Gold Star [Re: TrophyTR6] #782345 08/23/19 4:21 pm
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Brian Brown Offline
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Beautiful!! Well done!!

Re: I just bought a Gold Star [Re: TrophyTR6] #782348 08/23/19 4:41 pm
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Magnetoman Online Content
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Originally Posted by TrophyTR6
Following Magneto-mans excellent threads on Concentric tuning I got my carb dialled in by his recommendation and it transformed the bike. I'll probably need a 30 idle jet and a 220 - 230 main jet
First, congratulations on your gorgeous machine. I'm very pleased to read that someone has made use of the work I did to sort out the jetting for 1036s. However, given your machine's lack of air cleaner and the somewhat less than 100 oF air temperature in Sweden, it's not too surprising your main jet needs to be a little different than mine. Did you use the 2-stroke or the 4-stroke version of the Concentric?

Re: I just bought a Gold Star [Re: TrophyTR6] #782375 08/23/19 9:21 pm
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TrophyTR6 Offline OP
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Hugh Jorgen, Brian Brown thank you!

Magnetoman, you beat me to it. I planned to post some info on my 1036 journey in your Concentric thread. Thank you for your perseverance and tenacity testing and reporting your findings with the Concentric. It helped me and will help many others I’m sure.

My Concentric is a 2-stroke version and I rebuilt it as per your suggestions. From reading both of your Concentric threads I understood that I would probably need to alter some of the jets to compensate for the geographical differences. I live at sea level and temperature rarely go over 77F in summer. I initially had a 2,5 slide that came with the carburettor when I bought it from eBay. This slide was badly worn and the engine ran erratic and way to rich. Once I received a new brass no 4 slide it made a huge difference. The bike ran ok except at full throttle, it was clear that it needed a bigger main jet. I have now fitted a 220 and all hesitation is gone at full throttle. I will test with a 230, just to be on the safe side. The pilot screw is now only half a turn from fully in so I think I will test with a 30 pilot jet to hopefully come closer to 1,5 turn out.

Cheers/ Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #782520 08/25/19 9:12 am
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I can also add that I needed to adjust the float level quite a lot. With a new stay up float adjusted to the standard Concentric level the Pilot screw didn’t respond to adjustments and it was difficult to get a steady idle. After adjusting the petrol level with a clear pipe the Pilot screw responded as expected.

Cheers/ Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
Re: I just bought a Gold Star [Re: TrophyTR6] #782683 08/26/19 6:51 pm
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Ralph433 Offline
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Great looking bike. Have you found a brake pedal to use with the rear sets?

Re: I just bought a Gold Star [Re: Ralph433] #782983 08/29/19 11:59 am
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Originally Posted by Ralph433
Great looking bike. Have you found a brake pedal to use with the rear sets?


Thank you Ralph433! Yes I have the correct rear brake pedal but it’s not in the above picture.

/Chris


• BSA Gold Star DBD34 1956
• Triumph Trophy TR6 1959
• Zündapp KS125 1973
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