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Old 04-10-2015, 11:50 AM   #1
England-Kev OP
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My TriBsa 650 Project...

First a little back history, from two weeks ago....

You never know what you might find when walking around Kempton bike Jumble, and that was the case yesterday, when shortly before going to the pub for lunch, I came across this old long forgotten Tribsa special.




98% complete, and looking like it just needs a good service, it had a lot of interest from the passing hoards, but after nearly five hours, no one had bought it. Well that is until I showed up.

Consisting of an BSA "A" series frame, with a pre unit Triumph T110 650 bottom end, and a T120 alloy head and twin Amal carbs. It also has a BMW TLS front hub/brake assembly. I thought the price was very good, and a lot cheaper than most of the other projects that were at Kempton that day, so I agreed to buy, and it is being delivered today

Ok then, the bike was delivered, so a few more pictures to be going on with...















So today I started to attack the TriBsa project, I am not going to do a full strip and rebuild at this time, but just enough to get it running and useable...

One of the things that really need changing are the tiny flat bars, no good for a large person like me, so a set of Norton semi western bars have been fitted, and then I raided my spares box and found a Tommaselli "Daytona" throttle, and some genuine Doherty levers...







I also set to with the Gunk, and started to clean away the years of accumulated dirt...







I removed the plugs and kicked the oil around, and it was nice to see it returning to the oil tank with good pressure. But it would seem someone has stolen the sparks from the magneto...






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Old 04-10-2015, 12:01 PM   #2
Rich B
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Just what you need Kev, another project!


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Old 04-10-2015, 12:07 PM   #3
England-Kev OP
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Quote:
Originally Posted by Rich B View Post
Just what you need Kev, another project!
6 classic bikes, a classic 60's truck, and a 112 year old Barge, what am I going to do with my spare time
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Old 04-11-2015, 07:49 AM   #4
GBen
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It is nice to see an authentic cafe racer that was actually built back in the day.

You had enough brains to purchase this time-capsule, hopefully that means you also have enough brains to preserve it as-is as much as possible.

This is a historical document that shows just how far the neo-cafe hipsters are missing the mark with every one of their projects.....
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Old 04-11-2015, 01:12 PM   #5
LasseNC
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Looking forward to this one!
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Old 04-11-2015, 01:24 PM   #6
Rob Farmer
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Kev,

Take one of the plug lead pickups out of the mag, stick your finger in whilst kicking it over. That'll tell you what state the mags in

Looks like a great project. I love pre unit triumphs


I had a triumph morning myself today
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Old 04-13-2015, 08:49 AM   #7
chasbmw
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Back then, when I was a more ignorant little so and so, I had a T110 based Tribsa with a goldstar frame, I bought it as a scrambler then spent too much time and effort converting it back to a road spec. It was very quick even on road gearing and the engine was dead reliable (after a Magneto rebuild), but retaining oil in the primary drive was a bugger.

Both of us ended up flying over the bonnet of a right turning car, I was fine, bike not.

Good luck with the bike Kev
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Old 04-13-2015, 11:44 AM   #8
England-Kev OP
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Definitely no power left in the mag, new brushes fitted, but no sign of a spark.

I did though fit a battery, and was happy to find all the electrics are working, lights, horn, and brake light.

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Old 04-13-2015, 11:00 PM   #9
anonny
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That's a beauty
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Old 04-14-2015, 10:51 AM   #10
England-Kev OP
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Blimey, I'm exhausted....







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Old 04-14-2015, 11:34 AM   #11
Pigford
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Yep, they're spot-on Kev
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Old 04-14-2015, 11:43 AM   #12
Rob Farmer
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Have you seen these Kev? http://www.brightsparkmagnetos.com

They'll overhaul and fit the external cal for £70 http://www.brightsparkmagnetos.com/services/index.htm
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Old 04-14-2015, 01:15 PM   #13
roverlad
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Before ruling the mag completely dead try warming it in the oven for a while to drive out any moisture that may have accumulated from lack of use.
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Old 04-17-2015, 10:36 AM   #14
England-Kev OP
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More new parts arrived today, in an effort to get this old bike back out on the road. I have a nice new oil tank, that just needs paint, but is totally dent free. I also picked up my replacement carbs today. I have decided to drop the 376 mono blocks, and put a new matched pair of concentrics on instead. next job is to sort out the ignition, and the faulty magneto.

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Old 04-17-2015, 01:05 PM   #15
Velocipede
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Looks like the original builder grafted a BSA primary cover and gear box onto the Triumph motor.From my past dealings with pre unit BSA's and Triumph's I preferred the BSA cover it was easier to keep oil tight as I recall.I think it had a slipper tensioner for the chain too instead of moving the gear box back and forth a la Triumph which was a pain in backside.Nice score on the oil tank too Kevin,they must be getting quite rare by now.
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