Miscellaneous Cool Italian Bikes

Quote from: brad black on December 22, 2012, 12:53:39 AM

there's a guy in Adelaide who has a 100hp, 800cc 696. 94mm bore. from him:

"thought you might be interested in the performance of the new 800cc two valve - 696 motor ( Red bike). The white 696, own the state champ and set new bears lap record at Mac Park, unfortunately they cancel the Phillip Island round which we were going to take the 800 , we thought a 1m 48s would have be about the mark.
specification of the 800cc
bore 94mm
stroke 57.2mm
45mm inlet valves
39.5 mm ex
both titanium of our own spec
our new inlet manifold heads
new ecu
stock cams and timing
14:1 compression
lightened crank and Carrillo rods
55mm butterfly's"

"Head rework is fairly substantial on the 800cc with new inlet track at a steeper angle, oval 55mm throttle bodies (999r) and our titanium valves.
The whole lot would cost about $3500 per pair. We also make carbon airboxes to suit.

There is more development to go on the 696 motor which is doing a reliable 86 hp. and has more conventional head .

The standard 696 stud configuration is larger at 74mm x 94mm and the cases are alot stronger in this area than early models.
So we needed to find 6mm in diameter. 3mm radius, 1.5mm off the internal of the cases and the same off the OD of the barrels which we also shortened to match the 696 stroke of 57.2mm.
Pistons are CP to our spec as the pin is lower than a 1000 ds, weight is the same as a stock 88mm and we also set them for 48mm inlet which we have run on this motor as part of the development program. Currently running 45mm as that's all that was required with the improved port flow.
The rev limiter is a bit shy at 10250 rpm we'll run 11200 rpm on the track, this is still well within piston speed and acceleration limits.
We have also developed a cam manufacturing process and have lift profiles in mind but the maths is killing me!!!!
Cams can be alot more like 4V motors as the heads breath so well , we don't need as much duration and could even have shorter lobe separation.
This is why I've stuck with the stock 696 cam, although with the new inlets additional lift would help. From flow testing of the standards and ported stock inlet it's obvious that lift is no real advantage as they flow so poorly over 9mm (see attached)."

i was going to put it on my blog with some dyno charts and photos, just haven't got to it.

Very impressive.
Sounds like head reconfigure work akin to MBP or BCM, but local (to me).