1983 Bennelli 900 Sei for sale
You may have guessed the Sei is six in Italian. While there have been six cylinders in a motorcycle before (Honda RC166), Bennelli was the first production 6 cylinder bike. Designed in 1972 but hitting the market in 1974 with 750cc and increasing in 1979 to 906cc. With the Single Over Head Cam (SOHC) and 80hp offered at 8400rpm this portly 549lb bike was still able to reach 120mph and a quarter mile in 13.3 sec at 99.8 mph. Three Dellorto carbs are easier to tune then 6, but appear to be up to the job. I imagine the sound of six cylinders with each of their own exhaust offered on the 750 would be a great song, but for the 900 the six were funneled down into two.
Other changes going from 750 to 900 were the addition of mag wheels, duplex drive chain and rear disk. Reviews of the time give good grades on handling, but seem to fall short of the performance compared to the Japanese sixes, the CBX and the KZ1300. Drawbacks seem to be in the fit and finish allowed oil leaks with all those cylinder surfaces. The dry clutch also was not up to the task of putting 6 cylinders to one rear wheel.
The seller gives very little detail about the bike itself.
If you’ve been looking for an original, unmolested, not passed around 900 Sei, this is the one. I bought this bike in 1990 from a friend, and have ridden it only for Sunday breakfast rides…..Also included is the original tool kit.
The pictures show a very clean bike with no obvious flaws. One of the criticism given in the few articles I read was that the design draws a lot from the Japanese CB750, and not an original Italian design (think Desmo twin) This might be a reason why so many cylinders work so well together and appear to give little mechanical problems.
If you are a high speed, well handling engine with a bike around it, this looks like a nice choice.