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Gonna last a long time #719740
12/22/17 7:27 pm
12/22/17 7:27 pm
Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
A
Andy Higham Online content OP
BritBike Forum member
Andy Higham  Online Content OP
BritBike Forum member
A

Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
My Head gasket from Phil Pearson is going to last me years. It is 0.002" per layer, I measured the gap it is very tight on a 0.0015" feeler so I reckon I only need one or two layers. The barrel does not have a liner as such, it is a Nikasil barrel supplied by John Cronshaw


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
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Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
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'35 OK Supreme
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Re: Gonna last a long time [Re: Andy Higham] #719940
12/24/17 7:07 pm
12/24/17 7:07 pm
Joined: Aug 2001
Posts: 1,893
Elko, Nevada USA
dave - NV Offline

BritBike Forum member
dave - NV  Offline

BritBike Forum member

Joined: Aug 2001
Posts: 1,893
Elko, Nevada USA
Andy ... Please let us know how the Nikasil barrel works for you. Without the top lip of the OEM liner fitting into the no empty recess in the head seems it could possibly cause an issue with detonation. hmmm? But then Cronshaw should know ...

And speaking of Pearson ... A few days ago Phil Emailed that he has a crank and cases ready to send me. On 'n On we go.


Dave - NV
Re: Gonna last a long time [Re: Andy Higham] #719941
12/24/17 7:17 pm
12/24/17 7:17 pm
Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
A
Andy Higham Online content OP
BritBike Forum member
Andy Higham  Online Content OP
BritBike Forum member
A

Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
There is still a spigot on top of the barrel, it's alloy rather than iron.
It just needs a very thin gasket, one or two layers.
I have today machined recesses around two of the head bolts to take O rings. I have converted the head to "through bolt" fixing, It meant I had to plug and re drill the drain holes. There is still a remnant of the original drain between the stud holes and the pushrod tunnel, hence the need to seal the studs


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme
Re: Gonna last a long time [Re: Andy Higham] #723147
01/24/18 7:44 pm
01/24/18 7:44 pm
Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
A
Andy Higham Online content OP
BritBike Forum member
Andy Higham  Online Content OP
BritBike Forum member
A

Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
I put the head on and just nipped the bolts up. A 0.0015" feeler will not go in anywhere, I tried a B&Q till reciept (0.0009) and it was held tight.
I was chatting to Phil Pearson today and he suggested lapping the head to the barrel then using Yammabond/3bond/wellseal on the outer gasket face.
I gave it a try using Autosol as lapping compound, as its a lot more gentle than grinding paste. About half an hours work gave me a nice even finish on all surfaces.


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme
Re: Gonna last a long time [Re: Andy Higham] #723152
01/24/18 8:18 pm
01/24/18 8:18 pm
Joined: Feb 2012
Posts: 550
North Wales Uk
R
rocketgoldie Offline
BritBike Forum member
rocketgoldie  Offline
BritBike Forum member
R

Joined: Feb 2012
Posts: 550
North Wales Uk
looks like you joined the black flnger club.

Re: Gonna last a long time [Re: Andy Higham] #723157
01/24/18 9:07 pm
01/24/18 9:07 pm
Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
A
Andy Higham Online content OP
BritBike Forum member
Andy Higham  Online Content OP
BritBike Forum member
A

Joined: Aug 2015
Posts: 1,268
Bolton Lancs UK
Yes, in a couple of days it will be a grey finger when smearing a fine layer of 3bond on the head


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme

Moderated by  Rich B 


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