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Neily's D14
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cocorico
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December 27, 2019 - 4:14 pm
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If I recall correctly, there is some information on thread sizes in the Members Area. dunno

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine being rebuilt (slowly).

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Neily
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December 27, 2019 - 4:16 pm
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The frames are threaded with locknuts on back. I think my threads are no good in frame. Returning home from a hol on sunday.wilk pull stand off and check status

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Neily
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December 27, 2019 - 4:18 pm
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cocorico said
If I recall correctly, there is some information on thread sizes in the Members Area. dunno  

Yes but no info on centre  stand bolts

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mikef
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December 27, 2019 - 6:15 pm
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Hi Neil.
       If the threads are stripped then a helicoil thread repair would probably work. See link below to one supplier.
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All the best.
               Mike.

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Neily
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December 27, 2019 - 8:11 pm
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Cheese mike.so how do helicoil exactly work...it means not finding something with the same thread?

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cocorico
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December 27, 2019 - 8:38 pm
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** Please log in to view ** - "use the Force, Luke"

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine being rebuilt (slowly).

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Neily
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December 27, 2019 - 10:25 pm
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I'm kinda getting there😁

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mikef
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December 28, 2019 - 10:51 am
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I think the link below will show how they work.
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"May The Force be with you."

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Neily
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December 28, 2019 - 7:48 pm
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Thanks

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Neily
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December 29, 2019 - 2:48 pm
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20191229_130549_70.jpgAll thats left of stand bolts

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mikef
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December 29, 2019 - 3:04 pm
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Oh dear, they do look past their best, but worry not. Draganfly say that they have stainless steel versions , but nil stock at present. Would be worth giving them a ring to see when they will have some. If you get stuck, then I think that I could make some for next to nothing. If the threads are shot in the frame then we may also need a helicoil in there, but still do-able.
Don't panic.
           Mike.

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Neily
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December 29, 2019 - 3:10 pm
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Getting worried re my purchase!

Do you think this casing has been repaired or is it casting marks. I know alloy can have some weird looking attributes at times.Just behind20191229_131158_resized.jpgrsz_20191229_130623.jpgrsz_20191229_131158.jpg cylinder and front of casing

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Neily
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December 29, 2019 - 3:11 pm
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i know i am pulling engine out at some point soon sxo do you think i may have better idea once stripped?

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Peterg
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December 29, 2019 - 3:50 pm
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It looks to me like the crank cases have been repaired after a catastrophic failure, but it seems to be a decent repair.

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mikef
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December 29, 2019 - 3:51 pm
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Hi Neil.
     It is possible that the crankcase has suffered damage in that area due to the rivets on the crankshaft coming loose and getting jammed. This can crack the crank case. Your cases may have been repaired but as the engine was running OK, then if a repair has been done then it doesn't seem to be causing any problem and looks to be a professional TIG welding job.
Mike.

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mike p5xbx
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December 29, 2019 - 6:09 pm
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bournemouthbantams seem to have them instock but these maybe UNF thread as not correct part numbers best to ask before buying
but anyway the threads in your frame my also be striped
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also have them cheaper 90-4732 Not UNF thread

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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Neily
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December 29, 2019 - 6:31 pm
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Thanks.yes I had quick ride but thec3rd gear whine made me decide to strip

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Neily
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December 29, 2019 - 6:35 pm
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mikef said
Oh dear, they do look past their best, but worry not. Draganfly say that they have stainless steel versions , but nil stock at present. Would be worth giving them a ring to see when they will have some. If you get stuck, then I think that I could make some for next to nothing. If the threads are shot in the frame then we may also need a helicoil in there, but still do-able.
Don't panic.
           Mike.  

The banram 175 are different thread apparantly.i have sourced 2 with nuts.the holes in the frame are larger due to the wear and overused in that state mike.still doable?

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mikef
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December 29, 2019 - 7:13 pm
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Yes, just need to know what thread B175 uses, probably UNF but will need to verify that. If the hole is worn too much to take a helicoil then a timesert would work. Will need to take a look. See link below for timesert info.
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Mike.

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Neily
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December 29, 2019 - 9:02 pm
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That looks good.if hole is oversized what size do i need...or when drilled an insert to reduce it back to the standard

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