When you put a Yoshimura ST-1 in the oil-cooled 1200 series, it really does become normal, doesn’t it?
It’s hard to define what “normal” means, but… I suppose it means returning to the original state?
So I suddenly thought about something… Recently. Actually.
The valve springs are shared with the GSX-R1100.
I hear the ST-1 is set up almost identically to the GSX-R1100.
*Sorry, I haven’t verified this accurately ( ；∀；)
Wait a minute… GSX-R1100 ST-1?
Stock valve springs are fine.
Working backwards…
The GSX-R1100 cam was commonly adapted to the oil-cooled 1200.
=The cam sprocket can be installed as-is.
And
the valve springs work as-is too.
Yoshimura ST-1 Camshaft Set GSXR1100G-L
211-511-0101
Looking at Yoshimura’s specs
Oil-cooled 1200 series
MAX LIFT(mm) IN 8.80mm/EX 8.30mm
1mm DURATION(°) IN 235°/EX 230°
GSX-R1100
MAX LIFT(mm) IN 9.00mm/EX 8.50mm
1mm DURATION(°) IN 244°/EX 245°
It might be a bit more potent…
People who’ve experienced the high-rpm sharpness of the ST-2 would think, wow, this engine revs that high…
But
removing the head = doing the top end is something you’d want to do.
=When you remove the cylinder, sand gets in.
This is what a high cam feels like! I think it would give you that kind of feel.
I kind of predict that… the GSX-R1100 version might be discontinued? That’s what I thought…
This kind of adaptation is what makes the oil-cooled bikes fun.
Also, since this is speculation without data, take it with a grain of salt (*^-^*)
