644

Hey guys, I've had a question bugging me for a while. Is the 628 crank, conrod and piston a bolt-on part for the -04 644? Thinking of doing this once I get rid of the 644 crank. It should last 100 hours more, will see if that's enough for the short but cold finnish summer. :giggle...

Thanks to all those that took an interest in the rebuild of my 2004 FE 650 with 2002 Sem motor. Bike is awaiting top and bottom shock bearings for this rebuild to be completed, engine is all wired in to the 2004 harness and running. So fingers crossed it will run OK on the 2004 carby. I...

Hi, I just bought a rebuilt '04 FS650 (644cc) and got one ride out of it before finding metal in the oil. It's now completely apart and looks like failed CB bearings (P.O replaced all bearings except the CB bearings), destroying the left main and causing a bit of scoring on the piston & liner...

Currently looking at a fs650e 2005. This has the 644 engine correct? And is there any difference in the engines other than the crank? Is the 628 the better choice? Thanks in advance.