1179 or 1196 Wiseco Big Bore Kit: Worth it?

[79XS11F]

Re: 1179 or 1196 Wiseco Big Bore Kit: Worth it?

Originally posted by ae7f
A. Do you feel that the performance improvement from installing the 1179 or 1196 was worth the time and costs involved?

B. How much HP and torque do you know you gained or believe that you gained?

C. How much did it cost you for the upgrade (time, parts, labor, etc.)? This should include the cost of the kit, labor cost, additional costs for gaskets, jets, etc., but not the cost of things like new carb filters, exhaust pipes, porting, polishing, etc.

Thanks,
Ben

YES ... I have the 1179 kit in my bike and it is easily noticed as an improvement in power.
GO FOR IT
Rob

[pggg]

Valves and compression don't do a damn thing, it's the extra cc's making the difference, I've tried the cylinder head/piston swaps and more, the theories are still just that - theories. Once the motor's bolted up and the bike's running, if it's not a big-bore kit there's bugger all difference in performance no matter what pistons, valves or head you're using

[TomB]

Originally posted by pggg
Valves and compression don't do a damn thing, it's the extra cc's making the difference, I've tried the cylinder head/piston swaps and more, the theories are still just that - theories. Once the motor's bolted up and the bike's running, if it's not a big-bore kit there's bugger all difference in performance no matter what pistons, valves or head you're using

Really?????

So all them years I spent machining 11:1 heads for the Isle of Man TT and GP, and 13:1 for short circuit racing, for a racer mate was a waste of time

Bugger!!!!

[AlanB]

Hi Guys,

My experience tends towards high comp=high power as well.

I stripped my old T150V for the usual valves/guides and rings job that it regularly demanded. and ended up with some damage to the barrel top (Don't ask.....)

Only way to save it was to machine a ton off the top; around 28thou if I remember. The parts were scrap if not repaired, so nothing to lose!

It all went back together OK, no leaks, but MAN! it was FAST after that!...... no other changes, and I had to be pretty careful with the ignition timing, but it was MUCH faster than before.

That is why I am wondering about how to do the compression changes!

Am I right in saying that the early head has smaller valves, and a smaller chamber?

If so, has anyone tried the big valves in an early head?...... Is there space to cut the valve seats to take the bigger valves?

AlanB