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#714405 - 11/09/17 7:01 pm Trident Inlet.  
Joined: Feb 2012
Posts: 273
Peter Gascoigne Offline
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Peter Gascoigne  Offline
BritBike Forum member

Joined: Feb 2012
Posts: 273
Southampton UK

I think this head has been gas-flowed, but as I've not seen an un-modified one I can't be sure. Am I right or wrong?

Attached Files Trident Ports-a.jpgTrident Ports-b.jpgTrident Ports-c.jpg

1971 BSA A65 Lightning "Bitsa"
1966 BSA A65 "Beezuki" with GT550 two-stroke engine
1974 Triumph T150 830cc
1975 Suzuki GT550
1975 Laverda 1000 3C
1986 Yamaha SRX 600
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#714420 - 11/09/17 10:26 pm Re: Trident Inlet. [Re: Peter Gascoigne]  
Joined: May 2005
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shel Online content
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shel  Online Content
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Joined: May 2005
Posts: 3,753
ohio
A shot of the exhaust side be a better indicator, they can be pretty restrictive, Especially the center port, more so on the early heads


When given the choice between two evils I picked the one I haven't tried before
#714462 - 11/10/17 6:58 am Re: Trident Inlet. [Re: Peter Gascoigne]  
Joined: Jan 2004
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DMadigan Online content
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DMadigan  Online Content
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ca, us
The early HDA heads had better exhaust ports than the later AM heads:
[Linked Image]
[Linked Image]
But both need work. The intakes are fine as is for a production head. Unless you have a flow bench you are probably shooting in the dark. Just making them larger does not work well.
The shoulders around the exhaust ports have to be cut back and the cross sectional area change made smoother through the port.
Your intakes look stock from the machining marks.
[Linked Image]



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