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B175 Gudgeon pin
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Alan.Moore
Leicestershire
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September 20, 2020 - 12:40 am
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Gents

About to put the B175 piston back in and noticed the gudgeon pin has a bit of damage which looks like it was caused by an errant little end roller. The piston and bore are fine... so I don't want to get into a new piston...and I've already got a new little end, set of rings and circlips. 

The piston is a Hepolite /AE number 17952 and has the Segar type circlips (the flat type with the two eyes) so the gudgeon pin needs to have a flat end not one with an external chamfer. (Got a new one from Rex but its got a noticeably 45 degree chamfered outer end meant for the wire circlips...all the repro ones appear to be the same)

Just wondered if anyone has an undamaged pin lying about in an old Hepolite 17952 piston (which according to the Draganfly site, was the standard replacement piston for D14 & B175 in the day).

Here are a couple of pins, both are from a Hepolite 17952 piston (but both have damage). The one on the right is 'waisted' inside and is 4g lighter than the other but I think either type would be OK.

SDC13980.JPG

So if anyone has an old 17952 kicking about can you have a look please.

Cheers

Alan

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1939 Ariel VH, 1942 Ariel WNG, 1951 Triumph 6T Thunderbird, 1970 BSA Bantam B175, 1980 Honda CB250N, 1986 Yamaha SRX600

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Sponge
Lancashire (A chip shop somewhere near Preston)
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September 22, 2020 - 12:23 pm
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Alan, 

I have a couple of those flat ended gudgeon pins knocking around from previous B175 rebuilds.  They are not perfect, some discoloration etc but I would re-use them. Happy to discuss.  

Sponge

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Alan.Moore
Leicestershire
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September 22, 2020 - 3:36 pm
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Sponge

have sent you a PM

Cheers

Alan

1939 Ariel VH, 1942 Ariel WNG, 1951 Triumph 6T Thunderbird, 1970 BSA Bantam B175, 1980 Honda CB250N, 1986 Yamaha SRX600

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stubaker58
Sunny Felixstowe
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September 29, 2020 - 10:32 am
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Aa Ha!  So that’s why my circlip made good it’s escape!

Thanks Alan.

The piston is a Hepolite /AE number 17952 and has the Segar type circlips (the flat type with the two eyes) so the gudgeon pin needs to have a flat end not one with an external chamfer. (Got a new one from Rex but its got a noticeably 45 degree chamfered outer end meant for the wire circlips...all the repro ones appear to be the same)

D7/14 hybrid (4 speed with D7 crank etc.) on the road, D10 Bushman awaiting rebuilding.

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