“big­ger valves were an op­tion but i wanted a strong midrange over a mad top-end”

Practical Sportsbikes (UK) - - Special brew -

with the GSX, it’s set at 1mm, and with the rev-lim­iter set to 9500rpm there shouldn’t be any prob­lems.the EFE cams are di­alled-in for less over­lap, they give about 1mm more lift, and the heads have been skimmed too. Big­ger valves were an op­tion but I wanted a strong midrange over a mad top-end so we stayed stock, but with new valves and a three-an­gle seat cut.the head was flowed by a lo­cal guy who builds hill climb en­gines – the old school stuff – and a GSX head is not that dif­fer­ent to any­thing he nor­mally works on.”

SEP bal­anced and welded the crankshaft, there’s also awiseco 1170cc pis­ton kit in there too – pretty much the whole deal needed for a fast road mo­tor. “I spent most of the money on the en­gine,” says Kenny. “The smooth­bores are the thick end of a grand.the whole bike cost me eight grand all-up. It’s easy to spend a lot more than that, but you can’t re­ally get away with less than that if you’re do­ing the en­gine prop­erly.”

Look­ing at the dyno num­bers, it seems the ‘lo­cal guy’ knows what he’s do­ing, and that Kenny has done the en­gine ‘prop­erly’.

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