B175 Primary Case Dowel Pins | D10 D14 and B175 Models

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B175 Primary Case Dowel Pins

Astrauk

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March 23, 2021 - 6:05 pm

Hi, just traced the sticking kickstart return problem on my 1970 B175 to a missing primary case rear dowl pin.
Any suggestions as to where I can get a new one ? Nothing on ebay and Draganfly are on backorder. Part number 90-0108 I believe.

sunny

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March 23, 2021 - 6:29 pm

dont know wy thay thers a back order as thay have a machen shop so mack one yourself from fate sheet it well keep you

fit P M me if you get stuck

Ringting

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March 24, 2021 - 12:50 pm

Hi Astruk. I dont know what size they are but you may be able to buy a short length of steel tube off ebay and just cut to required length. The other problem I have with my D14 is if I tighten the rear most cover bolt too a reasonable torque it distorts the cover which tightens up on the kickstart shaft. It's because the gasket doesn't extend in as far as the bolt boss so. I need to make a little gasket ring of the same thickness as the main gasket to fit in there so I can properly tighten the rear cover bolt. Alan.

D1, D14/4, Guzzi LeMans, Triumph Trident 900, Maserati 160 t4. Mk1 Mini Traveller, Berkeley T60.

cocorico

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March 24, 2021 - 6:55 pm

I bought a set from Bournemouth Bantams, but I think they were made from 10mm tube as they were just oversize.

SpacedMarine

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March 24, 2021 - 7:10 pm

cocorico said
I bought a set from Bournemouth Bantams, but I think they were made from 10mm tube as they were just oversize.

So what size should they be coco?I'd measure mine but they're currently inside my engine 🤣🤣🤣

I'm guessing if 10mm is oversized the nearest imperial would be 3/8 or 9.53mm but I'm just guessing

What's 7/16 in mm again?

cocorico

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March 24, 2021 - 9:41 pm

SpacedMarine said
So what size should they be coco?...

I don't recall offhand, 3/8" is just under 10 mm, so perhaps that. I'm sure they have been discussed before (FAQs? whistle rofl ) so might be worth a trawl. I'll measure them when I have a chance.

Drill shanks make good size guides, btw.

mike p5xbx

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March 24, 2021 - 11:23 pm

Its a hollow dowel ext diameter is 3/8 inch measured with a drill bit
internal would be the clearance for the casing bolt to pass through

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

SpacedMarine

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March 25, 2021 - 9:32 am

If your desperate I could knock some up but googling bsa bantam crankcase dowels brought a few results up.If a few people require them I could do a job lot.

What's 7/16 in mm again?

Astrauk

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March 25, 2021 - 12:37 pm

Thanks for all the replies.

I have just measured up the holes in the primary and r/h crankcase and it is indeed 9.5mm (3/8”) with clearance to allow the retaining bolt, front dowel I’d is 6.5mm

I will get some 10mm mild steel tube and get a colleague to machine it down for me.

Trevor

GlenAnderson

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March 25, 2021 - 2:47 pm

3/8” outside diameter, 5/16” inside.

The ones listed on eBay, and supplied by the less scrupulous, are just cut from 10mm O/D 8mm I/D tube stock. I have recently returned some, along with a pair of main bearings, listed, priced and pictured as quality ones but actually cheap unbranded rubbish in a plastic bag when they arrived. Caveat Emptor indeed...

Astrauk

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March 25, 2021 - 4:15 pm

I called Draganfly yesterday morning regarding their “out of stock” dowels (90-0108) and was advised that they will be machined “in house” but no indication as to when this will be done 🥲

looks like my only option is to get a colleague to machine me one from some stock mild steel tubing.

Trevor

Stoo63

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March 25, 2021 - 5:13 pm

Typicallly, Draganfly and cost you 17.95 +vat for shipping......

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SpacedMarine

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March 25, 2021 - 5:21 pm

Stoo63 said
Typicallly, Draganfly and cost you 17.95 +vat for shipping......

That each or for a pair?

What's 7/16 in mm again?

mikef

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March 25, 2021 - 5:48 pm

Hi.
I've just found one in my box of bits. If you're having trouble getting one made you can have this one for the price of postage.
Just send me a PM with your address and I will send it.
Mike.

cocorico

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March 26, 2021 - 7:52 am

Here's a useful post from Mags.

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