What do I have here?

nogger · Post by **nogger** » Sat May 04, 2013 2:00 pm

I'm rebuilding my H2b but on closer inspection I seem to have a head I don't recognise. What's it off, I've never seen the engine run it came knackered. I'm assuming it won't make any difference.
The top is the one I've not seen?
The single ring is stamped 4 and multi rings is stamped 3.

Tartan Triple · Post by **Tartan Triple** » Sat May 04, 2013 2:04 pm

that looks to be re profiled so i would not use it

nogger · Post by **nogger** » Sat May 04, 2013 2:20 pm

Yeah!!! thanks for that Tartan I didn't notice that it has been skimmed as there is a difference in the height profile. It's the first time I 've had good look at everything as I just stripped it engine and sent it to get blasted. Even so they aren't a pair as the head dome is a different profile?

Tartan Triple · Post by **Tartan Triple** » Sat May 04, 2013 7:13 pm

looks like you need to find another head to make the set

nogger · Post by **nogger** » Sat May 04, 2013 8:25 pm

Yeah I guess I'll have to, anybody have spare outer head? So does anyone know what this might be off?

Tartan Triple · Post by **Tartan Triple** » Sat May 04, 2013 8:42 pm

looks like h2 but been worked on,multiple grooves on gasket face seem to be an attempt to seal the head.as for the profile of the head,it would be intresting if you had three the same,as some one has taken the time to re profile.
speak to scouse and leaon about head profile.
i :smt023

Hal · Post by **Hal** » Sat May 04, 2013 9:14 pm

The modified head has a double squish squish band. It is a common mod to increase performance and looks like the one that came with my FBG stage 111. Tthough I can't remember if that also had the multiple small grooves. You would likely have stratospheric compression if you tried to use it with cylinder having a standard exhaust port.

Tartan Triple · Post by **Tartan Triple** » Sat May 04, 2013 9:18 pm

scouse · Post by **scouse** » Sun May 05, 2013 4:46 pm

not sure about the compression, I have double squish heads, which actually lower compression

Gary T

Hal · Post by **Hal** » Sun May 05, 2013 7:17 pm

How do you work that out then Gary? If it is skimmed and re-profiled properly the cc's left in the combustion chamber will be reduced, not increased.

scouse · Post by **scouse** » Sun May 05, 2013 7:20 pm

dunno, Leo did mine

but deffo easier to kick over than a standard H2

Gary T

downpipe3 · Post by **downpipe3** » Mon May 06, 2013 6:35 am

leo re cuts his heads deeper to 29cc after squish bands are cut in

that head that nogger has looks like FBG as Hal said its probably 24cc and to add more to it if you rebore your heads should be recut to match the bore due to higher swept volume being compressed in the head

scouse · Post by **scouse** » Mon May 06, 2013 8:10 am

downpipe3 wrote:leo re cuts his heads deeper to 29cc after squish bands are cut in

that head that nogger has looks like FBG as Hal said its probably 24cc and to add more to it if you rebore your heads should be recut to match the bore due to higher swept volume being compressed in the head

Always learning :smt023

Gary T

Kawasaki Triples Club

What do I have here?

What do I have here?

m

Re: m