I only did the cam gear. I don't think they are ever balanced correct. So I lightened this one and balance it as well. All the other gears I left stock. Good enough for this bike.Did you lighten any of the gears as you did on the SC project?
Actually, removing the sharp edges from the pistions removes potential hot spots on the piston face.After both pistons were cut to size, I went in an smoothed all the sharp edges especially on the valve relief pockets. On these motors the valve opens pretty far into these pockets, so rounding the edges of the reliefs helps with flow. At least this is my theory.
Beautiful work 848. Is it too rude to ask what you budget is for this rebuild?No 900ss 100hp build would be complete without a set of ST2 cams. I bought mine from a member on this forum, Thanks.
Since I cant leave anything alone, I decided to drill the cams to help balance them and save some weight.
Since they are hardened you will need special straight flute carbide drill bits to do this. I already have a bunch so why not.
Bigger lift and faster revs need some MBP collet style half rings for the closer retainers.
Some valve guide seals from AV&V AV&V Advanced Valves and Valvetrain - Ducati Valve Seals The OEM ones seem so crappy compared to these
Nichols did the work to twin plug the heads. It now uses a tiny little plug to make it possible to fit
A picture of the twin plug location and the adjustable cam pulley from RedFox Ducati
The heads were striped of the old paint before welding. They were nice and clean from being blasted, but still a little dicoloration. So I took some VHT high temp silver and lightly dusted them to even out the color. Not thick and heavy, just a light coatVery very nice build, I love the attention to detail.
What did you paint the heads with?
No budget on this, just take my time and do it right. I would be afraid to add it all up. No way is it worth it, and I bet I could not get half of what I have in it if I sold it. These projects need to be a labor of love to justify it.Beautiful work 848. Is it too rude to ask what you budget is for this rebuild?
Well, no more oil as it is in the sump, but I can imagine there is a big volume of metal removed from the crank. This crank is a little bit lighter than the crank on a 749r, and basically the same rods. Ducati sold this bike as a street bike? I have also used a Nichols alloy flywheel. I can say the bike revs great, no problem easing off the clutch, and it idles at 1000 RPM with no trouble. I never understood what people meant about the engine weight and how it was not streetable. Maybe I know how to use a clutch, or maybe because all of my bikes have light internals and I don't notice it much. The only thing that is strange is when you are sitting on it when it is idling. Everything inside is so light that you hear the noise of the exhaust but don't feel the pulsing of the engine below you. Its as if you were sitting on a much smaller cc bike making a bunch of noise.Beautiful work as always. With all of the material you've removed from the engine internals, you've probably gained another liter of oil capacity - lol.
I'm curious about your opinion of how light is too light? How much reciprocating mass can be removed before the motor becomes difficult to use day-to-day? What compromises are you willing to make when lightening the internals?
Thanks again for all of the pics! Your heads look fantastic.