From my notes 20 years ago . . . a side note says I got this info from @dan r (thanks again!)
first...
green is a std size of 0.250", 24628-87A
orange is 0.2502", 24641-87A
blue is 0.2504", 24643-87A
white/grey is 0.2506", 24626-87A
once the case race is past the range of these you can do 2 things...
a new race or an oversize shaft.
case races that use the -87 roller set also oil them different than the 58-86 bearing.
early had a single hole that picks up oil just below the cam bearing in the crankcase.
later races get their oil from the same spot in the case but it leaks into a groove around the outside of the race, then the oil passes through the race into the rollers in 4 places, every 90 degrees.
a later case race is a good thing for early engines, just make sure the groove of the race lines up with the hole in the case.
race O.D., I.D. and width are the same, only difference is in the way they oil the rollers.
the 87 up rollers and cage are longer on the shaft than the 58-86 rollers and cages.
most likely you will need to leave out one of the bearing washers.
have seen bearing washers 0.050" and 0.070" wide BTW.
the bearing retainer is also different early to late.
the late retainer (11177) can replace the early spyrolock (11007) but don't even think of going the other way.
Jason
first...
green is a std size of 0.250", 24628-87A
orange is 0.2502", 24641-87A
blue is 0.2504", 24643-87A
white/grey is 0.2506", 24626-87A
once the case race is past the range of these you can do 2 things...
a new race or an oversize shaft.
case races that use the -87 roller set also oil them different than the 58-86 bearing.
early had a single hole that picks up oil just below the cam bearing in the crankcase.
later races get their oil from the same spot in the case but it leaks into a groove around the outside of the race, then the oil passes through the race into the rollers in 4 places, every 90 degrees.
a later case race is a good thing for early engines, just make sure the groove of the race lines up with the hole in the case.
race O.D., I.D. and width are the same, only difference is in the way they oil the rollers.
the 87 up rollers and cage are longer on the shaft than the 58-86 rollers and cages.
most likely you will need to leave out one of the bearing washers.
have seen bearing washers 0.050" and 0.070" wide BTW.
the bearing retainer is also different early to late.
the late retainer (11177) can replace the early spyrolock (11007) but don't even think of going the other way.
Jason
