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Main : Misc : Forum gx head or not

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gx head or not
gx head or notPopular
Submitterrb20More Photos from rb20   Last Update2005/4/30 4:46    Tell a friendTell a friend
Hits2735  Comments10    0.00 (0 votes)0.00 (0 votes)
i have had this sitting in a b110 sitting in my back yard for 12 mounths and didnt realise
is it a gx head or an a14 head.
Its on a b210 engine and does not have double valve springs  the numbers do not match any thing in the tech section.Would this be better on my a14 build than the head in my other picture  

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Poster Thread
rb20
Posted: 2005/4/30 5:06  Updated: 2005/4/30 5:06
No life (a.k.a. DattoMaster)
Joined: 2004/8/29
From: south australia
Posts: 1532
 Re: gx head or not
this motor is still a goer and revs up quite well i am guessing it is not compleatly standard what you guys think

Poster Thread
2332owner
Posted: 2005/4/30 5:25  Updated: 2005/4/30 5:25
No life (a.k.a. DattoMaster)
Joined: 2003/5/5
From: Okinawa, Japan
Posts: 1292
 Re: gx head or not
What number is cast on it?

Poster Thread
rb20
Posted: 2005/4/30 5:27  Updated: 2005/4/30 5:27
No life (a.k.a. DattoMaster)
Joined: 2004/8/29
From: south australia
Posts: 1532
 Re: gx head or not
there is only 2 numpers on it one is m30 and the othere is 071

Poster Thread
rb20
Posted: 2005/5/1 10:54  Updated: 2005/5/1 10:54
No life (a.k.a. DattoMaster)
Joined: 2004/8/29
From: south australia
Posts: 1532
 Re: gx head or not
so do a12gx heads work well on a14's

Poster Thread
ca18det_man
Posted: 2005/5/1 11:40  Updated: 2005/5/1 11:40
No life (a.k.a. DattoMaster)
Joined: 1999/11/25
From: Mudgee NSW Australia
Posts: 1187
 Re: gx head or not
Does not look like a gx head to me as it only has small round port manifold and single carby. If it where a GX it would have oval ports and twin SU's round port manifolds dont fit on GX heads.

Poster Thread
rb20
Posted: 2005/5/1 14:27  Updated: 2005/5/1 14:27
No life (a.k.a. DattoMaster)
Joined: 2004/8/29
From: south australia
Posts: 1532
 Re: gx head or not
round port manifolds only have one nut at the top holding them dont they, i know all my other round port manifolds do and i know this engine is a bitsa so the single carb dont meen much i have other ovel port manifolds that have the same stud pattern to this one. help me guys im getting confused

Poster Thread
ddgonzal
Posted: 2005/5/2 0:10  Updated: 2005/5/2 0:10
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31599
 Re: gx head or not
How a manifold bolts on is more dependent on the Year, rather than round-port vs. oval port.

Early round ports (1971-1973), like this.
Later round ports (1974-up) like that.

A-type Cylinder Heads

Poster Thread
rb20
Posted: 2005/5/2 10:47  Updated: 2005/5/2 10:47
No life (a.k.a. DattoMaster)
Joined: 2004/8/29
From: south australia
Posts: 1532
 Re: gx head or not
ok
i was going buy my other 120y motor which has the single bolt patern.
i guse theres only one way to find out and that is to pull it off and have a look

Poster Thread
ddgonzal
Posted: 2008/3/30 10:12  Updated: 2008/3/30 10:12
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31599
 Re: gx head or not
Quote:
there is only 2 numpers on it one is m30 and the othere is 071
M30 heads are late model A12s:
* new intake bolt pattern
* no oil hole on head face
* round port

If it is a dry intake (no water holes below the round ports) then it is probably a late model B120 head.

Go to Cylinder Head Part Numbers , and use Find to look for M30

Poster Thread
pepper
Posted: 2008/3/30 11:35  Updated: 2008/3/30 11:35
No life (a.k.a. DattoMaster)
Joined: 2004/5/30
From: Tamworth , NSW
Posts: 2484
 Re: gx head or not
i have one with the same numbers kicking around on the shed floor.
its not a gx head.