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Villiers 10e Question

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Villiers 10e Question

Post  Grahamb on Sun Nov 06, 2016 8:42 pm

Hi.

I have stripped my 10e engine mainly to find out why I could feel something binding through the foot rest. Which I now think was a low oil in the gear box, due to a shot main oil seal.

while riding I have always had a metallic rattle coming from the cylinder area. So today I was having a look at the head and barrel and noticed that the dome in the cylinder head is about 10mm smaller than the bore/piston diameter . Is this standard.

I was wondering if someone on the past has put a head from a smaller engine one this 10e engine .
Or do they use the same head on say a 150cc but machine the differently?
Can anyone confirm the dome diameter of a 197cc  head  please

Regards Graham

Grahamb

Posts : 5
Join date : 2016-11-06
Age : 64
Location : Carbrooke Norfolk

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Villiers 10E

Post  tbird on Tue Nov 08, 2016 9:15 am

Hi Graham
Don't know anything about the 10E engine but love your avatar.

Hope you get it sorted.

Graham Barker

tbird

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Join date : 2012-01-20
Location : medway towns

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Re: Villiers 10e Question

Post  Grahamb on Tue Nov 08, 2016 10:49 am

tbird wrote:Hi Graham
Don't know anything about the 10E engine but love your avatar.

Hope you get it sorted.

Graham Barker

Cheers Tbird ,
just started tinkering with mopeds and getting my head around 2 strokes.


Grahamb

Posts : 5
Join date : 2016-11-06
Age : 64
Location : Carbrooke Norfolk

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dome size

Post  piston 197 on Tue Nov 08, 2016 11:32 am

Yes the dome of the head is about 3/8" all round smaller than the bore, this is squish banding and is supposed to be there, the smaller cylinder heads from the 150cc and 125cc engines have a smaller PCD for the bolts and will not fit the 197cc engine
JH

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Re: Villiers 10e Question

Post  Grahamb on Tue Nov 08, 2016 2:58 pm

piston 197 wrote:Yes the dome of the head is about 3/8" all round smaller than the bore, this is squish banding and is supposed to be there, the smaller cylinder heads from the 150cc and 125cc engines have a smaller PCD for the bolts and will not fit the 197cc engine
JH


Thanks for the reply .
I will measure the squish to see what it is, are you aware of the correct clearance and is it the done thing to taper the squish band towards the dome a couple of degrees.

Regards Graham


Grahamb

Posts : 5
Join date : 2016-11-06
Age : 64
Location : Carbrooke Norfolk

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squish

Post  piston 197 on Tue Nov 08, 2016 3:25 pm

I skimmed the head and angled the squish about 15 degrees on a trials bike some years back and it made no difference at all ! You can have a go if you wish, but my experience tells me it will make no discernible difference ?
JH

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Squish

Post  Grahamb on Tue Nov 08, 2016 8:23 pm

piston 197 wrote:I skimmed the head and angled the squish about 15 degrees on a trials bike some years back and it made no difference at all ! You can have a go if you wish, but my experience tells me it will make no discernible difference ?
JH


I'll see what the squish measure and go from there.

I was reading up on squishes and came across a sentence saying something like, insufficient or incorrect squish can sound like a tin of stones being rattled . Which is the sound I have had ever since I got the bike.

Rode a friend FB the other week ( with 8e engine) ,had nothing like the level of sound emanating for the cylinder/head. (reason for this post)





Grahamb

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Location : Carbrooke Norfolk

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Re: Villiers 10e Question

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