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Location:
Brisbane
Registered:
August 2004
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18RG queries - Head pics
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Thu, 02 June 2005 09:27
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Following on from the other thread, here are some pics of 88210 and 88250 heads
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Location:
Brisbane
Registered:
April 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 09:31
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Where's the pics?
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Location:
Brisbane
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 09:39
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on the way... - imageshacking up...
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Location:
Brisbane
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 09:44
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Can't upload in tech?? Anyway, lucky for trusty imageshack!
Notice how this 88210 head has different cam gears to the 250 and the absence of 'yamaha' written on the front...
88210
88250
Base views in next post
There... something to peruse and discuss
(these heads are for sale by the way too)
Glen.
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Location:
Brisbane
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 09:46
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Bases
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Location:
Tamworth
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 10:00
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What are u asking for them? U wouldnt happend to have a stuffed head lying around? ei cracked water damaged etc.
Cheers for the photo's! very helpfull
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Location:
Brisbane
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 10:04
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No worries!
I do actually have a stuffed 88270 head, i thought it looked great but apparently it's gone too soft.
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Location:
Tamworth
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 10:09
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you have a pm!
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 13:22
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please please please measure the valve diameters!!
i want to have a complete list of all the valve sizes of different 18r-g heads!
Now here are some of the pics from my collection, i lost a whole bunch though when i last formatted 
# This is a worked 88230 head. i have no idea of the specs, other than i remember it having 45 and 39mm oversized valves (norbie can confirm this, he owns it!)
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 13:29
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oh - got some pics of my 88250 head before i got it fixed up - you can see the difference to the 88230 above where the valve bowls are opened up a lot more (which is what i got done to my 88250)
# here is the 88250 exhaust port with valve removed.
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Location:
Tamworth
Registered:
August 2004
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Re: 18RG queries - Head pics
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Thu, 02 June 2005 21:13
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anyone hit watter in these whilst porting? going to big?
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Location:
Brisbane
Registered:
August 2004
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Re: 18RG queries - Head pics
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Fri, 03 June 2005 02:24
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Valve sizes on these heads are:
210: IN- 45mm Ex- 36mm
250: In 45mm Ex- 38.5mm
Glen.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG queries - Head pics
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Fri, 03 June 2005 03:06
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if you hit water porting these heads, i would seriously wonder about your methods of porting!!
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Location:
Tamworth
Registered:
August 2004
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Re: 18RG queries - Head pics
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Fri, 03 June 2005 10:18
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hmm all depends on how big ur trying to go. Thats why i want a stuffed 18rg head that i can chop in half to check how much material u can take out. and how big u can make the vavles and seats.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG queries - Head pics
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Fri, 03 June 2005 10:34
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i have personally seen an 88253 head (maybe 88270) with 50mm intake and 40-something exhaust valves.....
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Location:
Tamworth
Registered:
August 2004
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Location:
Brisbane
Registered:
October 2002
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Re: 18RG queries - Head pics
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Fri, 03 June 2005 23:15
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This first pic is of my 88250 head that i am currently running {see sig} showing the ferrea stainless valves
this one is of the 0.470" {12mm} lift of the Surecam cams
this is the lift of the std 88250 cams
std 88250 lobes
my new cam lobes
this is the newly ported inatke port {i put the manifold on b4 i took a snap
the old exh port
the new exh port
full face of the new head
std 88250 chamber
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Location:
Brisbane
Registered:
October 2002
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Re: 18RG queries - Head pics
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Fri, 03 June 2005 23:15
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my valve recession of old head
random close up pic of 88250 head
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