Sorry,not enough information.It is a 2005 liquid cooled Super 9.On the right side above water pump is a small alum. tab,etched on tab is SH10B With 3702550 on line below it. I have a few service manuals down loaded.All of them have engine code SH10D on them.A google search shows that a SH10B was recalled ,something about motor mounts breaking at speed,not pretty.I don't really know if mine was recalled or not,but some one told me i would not b able to find parts.I was just wondering if anybody else has this engine code.I guess the big question is,is this thing safe to ride.It would do 50-60 with a 50cc but piston cracked so im going 70cc.wow no telling how fast it will go then.Like I said curious George has a bike. Thanks for any replys.