Author Topic: Hepolite pistons  (Read 663 times)

Online mugwump

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Hepolite pistons
« on: 23.02. 2016 17:49 »
Has anyone used the new Hepolite ( Taiwanese ) made pistons in their bike, and can anyone tell me which way up the rings go. The instructions in the box are a little confusing ( not difficult I know). the two top rings have a chamfer on the inside of the rings.Which way up are the chamfers.
Thanks

60'Matchy G12
58 AJS 18s
58 Ariel Huntmaster]

Offline muskrat

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Re: Hepolite pistons
« Reply #1 on: 23.02. 2016 18:34 »
G'day mugwump.
I haven't tried the pistons but to answer the ring question the chamfer goes up.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online mugwump

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Re: Hepolite pistons
« Reply #2 on: 23.02. 2016 20:53 »
Thanks Muskrat.

60'Matchy G12
58 AJS 18s
58 Ariel Huntmaster]

Offline Rocket Racer

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Re: Hepolite pistons
« Reply #3 on: 01.03. 2016 03:10 »
A number of owners over here have fitted the new (not nos) hepolite flat tops and I have yet to hear any problems regarding
For a road engine I'd say they are a good option
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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Online Brian

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Re: Hepolite pistons
« Reply #4 on: 01.03. 2016 03:19 »
I think I was one of the first people to use these pistons, before they were sold as "Hepolite".

This is a link to my original post.

http://www.a7a10.net/forum/index.php?topic=2642.msg17245#msg17245

At the time I found the pistons very good but the rings were scrap. I believe the pistons currently being sold as "Hepolite" are the same pistons but now supplied with "Hastings" rings which should be good. Maybe someone can confirm this.

I no longer own the two bikes I fitted them to, both plunger A10's but both bikes were still running strong the last time I heard of them.

I will definitely use these new "Hepolite" pistons the next time I need a set.

Online mugwump

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Re: Hepolite pistons
« Reply #5 on: 01.03. 2016 10:10 »
Thanks guys, thats very helpful. I have to say looking closely at the rings they do look a bit rough. I have also heard that Gandini and Hastings do rings which are a straight fit and far better. By the way, what ring gap should I be aiming for.

60'Matchy G12
58 AJS 18s
58 Ariel Huntmaster]

Online Brian

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Re: Hepolite pistons
« Reply #6 on: 02.03. 2016 02:45 »
The BSA book says .011" for the oil ring and .013" for the plain rings but it may be a bit more if your bore has some wear.