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Tup's Kiwi Trail Bronc
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tup
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February 23, 2019 - 3:14 am
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Just trying to make sense of the engine and frame numbers.. looks to definitely be a Trail Bronc from what I can work out on the technical sheets?  Is anyone able to double check my checking possibly? 🙂   Thanks again 

 

Frame - D7 43623, Engine Number ED7 9353

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swalsh58
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February 23, 2019 - 8:30 am
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I’m away from the pc at the moment. I will check the records when I get home later this afternoon.

Current bikes......1958 D5, a 77 Suzuki GT250 and a 77 Honda CB125S. I have a 74 Kawasaki S3 400 and a B175 waiting for restoration. A 1980 Honda CB400N waiting for MOT.  Everyday ride is a 2011 Harley Davidson Sportster. 

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swalsh58
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February 23, 2019 - 5:12 pm
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tup said
Just trying to make sense of the engine and frame numbers.. looks to definitely be a Trail Bronc from what I can work out on the technical sheets?  Is anyone able to double check my checking possibly? 🙂   Thanks again 

 

Frame - D7 43623, Engine Number ED7 9353  

D7 43623 is a blank record, are you sure of the numbers? Machines either side are from October/November 1964.

Current bikes......1958 D5, a 77 Suzuki GT250 and a 77 Honda CB125S. I have a 74 Kawasaki S3 400 and a B175 waiting for restoration. A 1980 Honda CB400N waiting for MOT.  Everyday ride is a 2011 Harley Davidson Sportster. 

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tup
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February 24, 2019 - 1:28 am
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Pretty certain.  Will double check when I'm with the bike tomorrow.  Thanks so much Swalsh58

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tup
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February 25, 2019 - 6:49 am
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Just double checked and engine number is ED7 - 9353    Frame no: 90-4316  (i think).. pics attached. thanks againIMG_1268.JPGIMG_1266.JPG

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swalsh58
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February 25, 2019 - 8:56 am
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That’s not the frame number, it’s the part number. Look on the headstock or the front left engine mount. The number is stamped on, not moulded on the part

Current bikes......1958 D5, a 77 Suzuki GT250 and a 77 Honda CB125S. I have a 74 Kawasaki S3 400 and a B175 waiting for restoration. A 1980 Honda CB400N waiting for MOT.  Everyday ride is a 2011 Harley Davidson Sportster. 

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tup
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March 4, 2019 - 4:39 am
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Gees spot the learner huh!!!  Headstock serial: D7 43823..  thanks again 🙂 

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swalsh58
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March 4, 2019 - 9:48 am
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D7 43823 left the factory on the 6th November 1964 and was sent to BSA in New Jersey. It is shown as a D7 Trail Bronc 

Current bikes......1958 D5, a 77 Suzuki GT250 and a 77 Honda CB125S. I have a 74 Kawasaki S3 400 and a B175 waiting for restoration. A 1980 Honda CB400N waiting for MOT.  Everyday ride is a 2011 Harley Davidson Sportster. 

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Sponge
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March 4, 2019 - 2:47 pm
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Hi Tup,

Congrats on unearthing another Trail Bronc.  They are quite rare. I remember looking for one of these for 20 years in the 1980s and 1990s and couldn't find a trace of one - then in 2001 they started to come up on the internet (ebay) etc. I managed to track down an original TB in Washington State (Seattle) USA. The bike had been laid-up when its original owner could not get it to start and it had rested up against a barn wall for nearly 35 years.  All it needed was a new condenser and a clean up and it was good to go.

As Sunny says - there are about 15 TBs that we know of around the world but New Zealand is a surprise - I wonder how it got from New Jersey to there ?

Your bike will be an 'East Coast' model originally in 'Nutley Blue' - which seems to be exactly the same colour as 'Sapphire Blue' which was specified for the West Coast models.  I think that the tank transfers were different on the East Coast models - being a bit bigger. 

Your rear fender (mudguard) has been chopped off - this was a common modification as the original mudguard extended quite a long way down the rear tyre and I guess could get fouled on rocks and bushes and things. It also made changing the back wheel a bit more difficult. There were also some rear mudguard stays which strengthened it all up at the back.    Your seat is correct.     

If you are running the 80 tooth rear sprocket then make sure that your chain adjuster pad is in good condition, it is an A65 primary chain tensioner, so not too difficult to obtain.  

The exhaust pipe is a special bend and will be almost unobtainable nowadays but the silencer is just a standard D1 / D3 rocket shaped unit with a fishtail which is available, however you might need to remove some baffles from within it in order to get your D7 to run right.  I do have a genuine original exhaust pipe for the TB so I might be able to send some piccies , tracings etc if it helps.  The original silencer for the west coat models was heavily baffled to keep the noise down in California etc - I fitted mine to my D1 Competition model, it was really quiet but it seized up.

Not sure if you have the original side stand on the bike ............ ? this grows out of the RHS.  

If you need any help/advise etc - let me know.

All the best

Sponge  

 

    

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Sponge
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March 4, 2019 - 3:11 pm
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Trail Broncs,  Trail-Broncs.jpg

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tup
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March 4, 2019 - 7:38 pm
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YAYE!  thank you so much guys!  i'm absolutely stoked.  Would love a pic of the exhaust sponge.. thank you.  I've found a guy in the south island here who also has one.. he spectrometered the colour and is sending me a sample so I can get mine back to original.  He's also sent me the manuals for this so I can get everything as much back to how it should be as possible.  No side stand and it looks to have had a whack underneath and someone has used an allen key as a gear shifter and reinforcing rods for footpegs so I'll try and find some of those also. 

Thanks so much 🙂 

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tup
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March 8, 2019 - 8:55 am
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Just had an email from guy I purchased it from.. he brought it to NZ from Southern California.. he stated it hasn't done much mileage but didn't know much about it. That explains how it got here anyway 🙂 

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bantammad
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March 13, 2019 - 8:51 pm
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Hi Tup have a look at my road trail trials type 1956 D3 bantam hybrid engineD10 186cc Tod head MZ conrod B175 crankshaft 12v lights 6v ignition this bike was a bit like the yours at first still got a bit of painting to do as can be seen note the 28mm flat slid carb timing set at 19deg engine response very snappy does it give you any ideas yours is just right to get some good fun out of best regards Les  bantammad 👀[Image Can Not Be Found]

hopefully photos to follow I’m a dinosaur 

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bantammad
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March 14, 2019 - 11:48 am
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389C8672-14FB-4634-98C0-F4B42CA74AFC.jpegbantammad said
Hi Tup have a look at my road trail trials type 1956 D3 bantam hybrid engineD10 186cc Tod head MZ conrod B175 crankshaft 12v lights 6v ignition this bike was a bit like the yours at first still got a bit of painting to do as can be seen note the 28mm flat slid carb timing set at 19deg engine response very snappy does it give you any ideas yours is just right to get some good fun out of best regards Les  bantammad 👀[Image Can Not Be Found]

hopefully photos to follow I’m a dinosaur   

[Image Can Not Be Found]

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bantammad
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March 14, 2019 - 12:00 pm
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Hi Tup think you have received the photo had to get the grand kids to sort it out forgot to say the barrel has six ports abit trick have fun regards Les.   Bantammad 

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tup
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March 15, 2019 - 2:04 am
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WOW! That is really gorgeous Les! 🙂   and well done loading the photo! 🙂  Very very cool bike  

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neddyo
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March 16, 2019 - 7:01 pm
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Hi Sponge,

I love all the Trail Bronc info on this post, I would dearly love

one of these buy finging one in OZ is way out of the realms

of possibility, I'll have to content myself with my Bushman.

I would like to ask a favour. I am trying to build up  50's D1 competition

replica and wondered if you could measure the length of the upper tubes

of the front forks please.

The reason i ask this is that I noticed their part number varies from the standard

D1 forks and in photo's they do look longer.

Thanks in advance

Nick.

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Sponge
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March 17, 2019 - 9:43 pm
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Hi Nick,

 

Measured the upper fork legs at 20.5 inches (give or take a bit ).

I think the Comp / Trail Bronc legs look longer because they don't have the headlamp bracket etc.

All the best

Sponge

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March 17, 2019 - 10:11 pm
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Hope you don`t mind me temporarily hijacking your thread Tup?

Nick, I`ve just measured three sets of fork top tubes, red loose D5? 19", complete blue fork assy,plus green ones in a built-up D3, both 20"...includes seal holder and top yoke.

Did I dream it, or was the extra length gained in the bottom slider component for the Competition models? I bet Sunny knows 🙂

Blue

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neddyo
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March 18, 2019 - 6:54 pm
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Thanks Sponge and Blue,

Maybe the different part number is to do with mudguard

stay stud.

Anyway I'll press on with the tubes from a D1 ridgid I have.

I bought the raised foot rest and hex bar set up from a person at

Stanford Hall, cant remember his name but he makes all sorts

of gear for bikes,  particularly for pre 65's

I also found a comp lifter  and cable with a 14mm thread

so will have to machine another plug hole.

I just sold a D7 for a good price so Jan and I with luck will

get back to your beautiful country next month.

But for your winter we'd love to live there.

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