Are WBX heads closest in design to T1 or T4?

DORIGTT · Post by **DORIGTT** » Wed Jul 11, 2007 2:51 pm

Are the WBX cylinder heads closest to T1 or T4 in port pros and cons?

Unkl Ian · Post by **Unkl Ian** » Wed Jul 11, 2007 3:07 pm

The exhaust is more like a T1,but the combustion chambers are totally different.

Post by **Piledriver** » Thu Jul 12, 2007 11:24 pm

They don't resemble T4 heads in any way.

Like Unkl Ian said, most like T1s, only water cooled, longer valves, ex port flange rotated 90 degrees, and intake ports are different, and completely different chamber type. (in the piston, mostly, Heron style)

But other than that, they are just like T1 heads

At least the same rockers fit.

tencentlife · Post by **tencentlife** » Fri Jul 13, 2007 3:59 pm

They are like T4 heads in one little way: the exhaust valve stems are 9mm.

Any T1 rocker gear fits up fine, but the wbx rockers started off with a 9mm adjuster, and went up to 10mm at some time, I don't know which year.

Unkl Ian · Post by **Unkl Ian** » Fri Jul 13, 2007 5:14 pm

The WBX bore spacing is the same as T1,
which is how the Oxyboxer is possible.

The T4 bore spacing is larger,which allows larger pistons.