I bet ya haven't seen one of these before.

[mx250]

http://cgi.ebay.com/ebaymotors/YAMAHA-MX250-MX-250-NOS-CONNECTING-ROD-PLAIN-BEARINGS_W0QQitemZ120159787056QQcmdZViewItem?hash=item120159787056

 

[jimg1au]

rebuilding fj1100s

Part # = 36Y-11656-10-00
Part Description = PLANE BEARING,CONNECTING ROD
Model Count = 25
FJ1100L 1984 1100 FJ1100 Street
FJ1100LC 1984 1100 FJ1100 (Cal) Street
FJ1100N 1985 1100 FJ1100 Street
FJ1100NC 1985 1100 FJ1100 (Cal) Street
FJ1200A 1990 1200 FJ1200 Street
FJ1200AC 1990 1200 FJ1200 (Cal) Street
FJ1200AD 1992 1200 FJ1200A ABS Street
FJ1200ADC 1992 1200 FJ1200A ABS (Cal) Street
FJ1200AE 1993 1200 FJ1200A ABS Street
FJ1200AEC 1993 1200 FJ1200A ABS (Cal) Street
FJ1200B 1991 1200 FJ1200 Street
FJ1200BC 1991 1200 FJ1200 (Cal) Street
FJ1200D 1992 1200 FJ1200 Street
FJ1200DC 1992 1200 FJ1200 (Cal) Street
FJ1200E 1993 1200 FJ1200 Street
FJ1200S 1986 1200 FJ1200 Street
FJ1200SC 1986 1200 FJ1200 (Cal) Street
FJ1200T 1987 1200 FJ1200 Street
FJ1200TC 1987 1200 FJ1200 (Cal) Street
FJ1200U 1988 1200 FJ1200 Street
FJ1200W 1989 1200 FJ1200 Street
FJ1200WC 1989 1200 FJ1200 (Cal) Street
XS360-2D 1977 360 XS360 2 Street
XS360C 1976 360 XS360 Street
XS360D 1977 360 XS360 Street

[Doc]

a plane bearing eh..something I'd expect to find on a 747  slipper bearing is a much more popular name. Quite efficient and it allows crank grinding and undersizing to happen although I agree, I have never seen them for an MX250 ..ever rarer than rare!

[firko]

I think the seller has got it all wrong. As Jim has pointed out, the part # is for an FJ 1100 roady. There is little hope of a plain bearing fitting into your MX250.

[Tim754]

I got hope of putting rolla's in big ends ot the 754 now Tim

[Doc]

weird thing I never realized Tim is for sustained high rpm the old slipper bearing are more reliable than your everyday needle roller bearing. The friction can be reduced quite dramatically as it floats on oil basically. I'm led to believe a needle roller can actually have more mechanical drag in use. My little cbr honda would rev happily to 20000rpm and it cruised for hours on end at about 13000-16000rpm..mind you I could not feel my hands after the first hour or so such was the buzzing   

[Tim754]

Umm I do not have stock Honda slippers or rods  in my top 754 Sidecar engine... They are the only parts used from the old Supercharged drag bike. ,one reason of a few why it has between 5 to 11 base gaskets,,  Shhhh