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« Last post by czmike on January 21, 2025, 03:54:08 PM »
Hi Steve,
Pages 40 & 41 of the 175 Parts catalogue do actually show the info you need but the arrangement of the drawings is confusing.
The exploded view of the lamp parts ("Headlamp Assembly" in the part number listing) shows detail that is common to all variants I think (I don't have them all so I can't to check!).
The DT bucket & speedo are shown bottom left of the illustration page.
So I think those two diagrams together give you everything for a DT.
The Index No.'s for the diagrams are unique for each part drawn (from 1 to 40) so that helps.
Best Regards,
Mike,
Australia
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« Last post by anthony c on January 21, 2025, 09:54:53 AM »
Wow well Campbell Gorman unfortunately passed, another Sad Irish Race story of a good guy. Irish Racing is unforgiving.
Run on Public roads sometimes directly through Towns and Villages check out this Utube Video :-
Along the course, Walls, trees, Barbed Wire fences, Bridges. I hit a Bridge in the 1969 "Cookstown 100" during a rain storm don't misunderstand me Extremely well Run Events super Track Marshals,Doctors, Flag man etc.
Both Bridgestone,s are still in Ireland , i posted a photo of the one that Campbell Gorman rode. The other one ridden by Ray McCullough is owned by Bertie Bradford, its Fast. I hopefully will also get a Photo to Post.
Ray McCullough is a legend in Irish road-racing and was Irish Champion since he was a young Lad in 1960 he was equal to the very best International riders but never left Ireland to race, when he was 70yrs old he did a Parade lap of Dundrop (UGP) course went out and broke the Course Record. Joey Dunlop if you know the name got really fast catching McCullough and often said " when your up with that man McCullough its really scary" and Joey was no Slouch !! as later I.O.M. wins would Prove.
To be honest the Sponsors who owned these Race Bikes the guys rode, where purchased Factory Machines like Yamaha,s, Ducati's, Nortons, AJS's, Bultaco's out of the box Race ready with spares and the factory continually working to improve them to Win races, just needed a good Rider to get results.
The rest of the guys would choose Road Machines and work on them to get Race type performance, due to not having the $ to buy Factory Bikes some where very successful some just needed more and more Development.
Hope this answers your Query
Regards Bert
Interesting that you mentioned the 1969 Cookstown 100 for Brian Cartwright rode his Bridgestone 350 at this event. If I can, I shall post a good photo of the start of the 350 race showing the Bridgestone getting a great start. The bike finished in the top 10. Brian lent his Bike to Bill Smith for the big Bishopscourt event where Bill went on to win the 350 race after a race long dice with Cecil Crawford. Brian Cartwright sold this bike to Campbell Gorman at the end of the 1969 race season taking a Yamaha in part exchange. Campbell though then bought a new chassis that Billy Guthrie had produced for the new Yamaha race bikes and fitted all the running gear from the Brian Cartwright Bridgestone onto this chassis.
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« Last post by anthony c on January 21, 2025, 09:46:27 AM »
While owning a GTR, I used to follow National and Clubmans racing in the North of England at the time.
Visiting Oulton Park (as a marshall), Aintree, Wallasey with occasional run to Mallory Park in the Midlands. Was never aware of any BS racer, I'm sure I would have picked up on it. Could always pick out a thundering 350 Aermacchi from a bunch of 20 two strokes down the back straight at Mallory  
Brian.
A young Tom Herron raced the Brian Cartwright Bridgestone 350 at Oulton Park in 1969.
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« Last post by Stumpy on January 21, 2025, 04:41:39 AM »
Unfortunately I have only been able to view some silencers , but not buy them. I'm still looking for a decent pair in the UK if anyone has something suitable.
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« Last post by anthony c on January 20, 2025, 08:21:41 PM »
place holder
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« Last post by anthony c on January 20, 2025, 08:09:47 PM »
Next race up was the Leinster '200' on the 18th May 1969. This was a short circuit track " Mondello Park " in Southern Ireland. Brian Cartwright finished 4th on the bike in the 350 class but had a very good start and arrived into the first bend leading the field. Bill Smith had past Brian Cartwright at some stage in the race to finish in the top 3. After they had stopped in the pit lane Bill and Brian had a conversation about how well the bike was going and Brian agreed to bring the bike up to the official Northwest 200 practice night - the following Thursday - for Bill to give it a try. Bill rode two laps of the Northwest 200 before pulling in. The bike was over revving in top gear despite doing will over 130 mph. The bike was fitted with the tallest gear they could fit plus there was concern over whether the tank was big enough so Bill decided to stick to his honda race bike. The clip below at 47 seconds in shows the start of the 350cc class at the 1969 Leinster '200'. The no 56 Bridgestone is seen making a very rapid start. Its a pity that this documentary on the Mondello Park circuit only put in a 2 second snippet of the start. Photo of Bridgestone racing at the 1969 Cookstown 100 ridden by Brian Cartwright. https://www.flickr.com/photos/202148737@N05/54287269196/in/photolist-2qHbrMW
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« Last post by anthony c on January 20, 2025, 08:09:07 PM »
In late 1968 Brian Cartwright had been running his Motorcycle Shop in Belfast for most of the sixties.
He had the local Agency for Bridgestone Motorcycles and thus had many dealings with Bill Smith - The UK Bridgestone importer.
Brian had been a road racer, but was retired several years at this point.
When he first had dealings with the 350 it occurred to him that the engine had a lot of potential for a race bike.
He contacted Bill Smith and soon had bought a brand new engine complete with ignition from Bill for the pricely some of 100 pounds sterling.
Brian had a 3/4 year old 250 Bultaco production racer in his shop that the 350 Bridgestone engine was to be fitted to.
This bike was built up over the winter of 68/69 ready for its first test run at Kirkistown in March of 69.
In those days this circuit was not locked and the Bridgestone and 3 people were there to test it. The circuit was otherwise empty. Brian Cartwright, Ivor Greenwood and Ronnie Weatherall
All 3 tried it out with Ronnie getting a little excited and failing to take the fast left hander and taking to the grass.
Ivor Greenwood had been calling to the shop through the winter to observe the bikes build and was dead keen to get the first race on the bike.
The first race meeting of the year was at Maghaberry, a local short circuit.
Ivor raced this meeting and indeed Ivor was dicing at the front of the field but eventually fell off due to an exhaust pipe strike on the ground.
The bike however had ran very well and showed a lot of potential.
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« Last post by Forum Admin on January 20, 2025, 05:49:59 PM »
testting 123
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« Last post by steve on January 19, 2025, 06:05:24 PM »
Glad to see that Stumpy has had success finding a silencer! I’m also in need of a silencer (muffler) for my 175 DT…except I need a near side (left hand), just in case anyone can help. I’m in the UK.
Thanks, Steve
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« Last post by steve on January 19, 2025, 05:48:46 PM »
Hi, I’ve just bought a 1966 175 Dual Twin and have been making a note of a few items I need from the 175/200 parts book. I’ve noticed that there’s no info in the book about the speedometer and headlamp, which seems very odd. Am I missing something or does anyone know if the info is located elsewhere?
Thanks, Steve
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