Bridgestone 50 Sport Engine rebuild - Technical help required

[RayK]

I have just finished the re-build of the BS 50 motor.  All seemed well until the re-building of the clutch assembly which went back together OK .  I notice that there is about 1/8 inch end play when the motor is on its side with clutch face up if you pull upwards on the clutch assembly.  Is this normal?  I am hoping that when I put the clutch release arm/release push screw with the crank case cover will push against the bearing in the clutch set plate it will take up this 1/8 inch end play.

Any help would be appreciated.  I am dreading the possibility of pulling the motor apart again.

Ray

[Richard Clark BS parts]

Ray

Do you mean the whole clutch moves in and out?  Or do you mean the clutch itself has play between the plates and the top pressure plate?

Richard Clark

[RayK]

Hi Richard
The whole clutch moves up and down with the shaft going into the crankcase.  There is slight movement also within the clutch itself.  The plates could be worn.
Ray

[Richard Clark BS parts]

Ray,

Do you have  part number 09048-10  #12 Thrust washer, installed on opposite end of that clutch trans shaft?  See Transmission
section in the 50-60 sport PARTS MANUALS in the DOWNLOADS section

Richard Clark

[RayK]

Richard
I am 99% certain that #09048-101 is installed - please note that I have used new Oil injection cases probably from a 90.  Should these be different from the 50 engine cases?

Cheers
Ray
BTW the parts arrived OK - thanks for the plugs etc.  Tank pads would be nice ( rary bears I'll bet )