the ducati performance kits with the ram pistons are usually about 12.5:1 and will cause lots of problems on our fuel. the carb bikes, with the single stage ignition advance, have 32 degrees advance from 2,000 or so rpm onward. the injected bikes get that about 5,000rpm and have mid 20 low down. with 11:1 or so they're fine. my st2 was about 11 and it didn't ping, altho it was maybe a bit coarse around 4,000 or so. the pistals come as 10.5 and 11.5 i think as do the ferraci (je) ones maybe. i've run je 11.5 in injected 900.
the carb bikes are a real problem because you can only retard the pickups giving idle and just off idle issues or you can buy an expensive silent ketnick setup. it is possible to run a 1.6m ecu off a crank trigger (mv do it) meaning you could do it with a 1.5m also as they're the same software pretty much and duane can fix that. so you could with fim software run a 1.5m using a rpm only map. it'd be wasted spark but the std carb ignition system is anyway. you could add a manifold vacuum sensor to get a tps like signal that with the right manipulation would give you a 3d map. i'd like to try that on the 750m if i ever get all the other stuff done first, like having the engine assembled and fitted.
the dp ones are easy to id. they have big round domes and the skirts have lots of lines running around them. they're made by RAM.
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