Hi All,
I am about to drop new Hepolite pistons into my 59 G12. Unfortunatly I dont know the direction they need to go in. They are the ones with a round head and they have a cut away on one side for a valve to clear the top of the piston. So the question is, does the cut away need to be on the inlet side or the outlet ?
Thanks for your advice.
Yves
Hepolite Piston Direction
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- clive
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Re: Hepolite Piston Direction
The 59 G12 spares list illustrates a piston with two cutaways. I am confused that a piston may need a cutaway for one valve only. Are you sure its right for your bike?
clive
if it ain't broke don't fix
if it ain't broke don't fix
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Re: Hepolite Piston Direction
Hi Clive,
I certainly hope its the right one. I actualy have 2 sets. And they both look the same. I bought them independantly supposedly siutable for 59 G12. As I have been reeding, 59s was a special year in terms of Pistons. Before and after the used different shapes...
I have added a picture
On the verry left is the one I am replacing. To me it looks like, the cutaway is not realy required. Because the origional one is completly the same but without the cutaway...
I certainly hope its the right one. I actualy have 2 sets. And they both look the same. I bought them independantly supposedly siutable for 59 G12. As I have been reeding, 59s was a special year in terms of Pistons. Before and after the used different shapes...
I have added a picture
On the verry left is the one I am replacing. To me it looks like, the cutaway is not realy required. Because the origional one is completly the same but without the cutaway...
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- Posts: 90
- Joined: Sun Aug 26, 2018 9:07 pm
- Location: Germany
- clive
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- Joined: Mon Jan 01, 1990 12:00 am
- Location: LONDON UK
Re: Hepolite Piston Direction
They are not completely the same as the dome in your new one is higher. It will give a higher compression and is why the cut out is there. Cannot help with which way it should be fitted. Can anyone with more knowledge of the 59 G12 help?
clive
if it ain't broke don't fix
if it ain't broke don't fix
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Re: Hepolite Piston Direction
The cut out is for the inlet valve
Poul
Poul
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Re: Hepolite Piston Direction
Its amazing, the way you guys are helping.
I cant thank you enough.
Thank you !!!!
I cant thank you enough.
Thank you !!!!