Inner primary bearing race
An inner primary bearing race includes a tapered inside diameter portion to prevent the inner primary bearing race from walking down a transmission mainshaft into engagement with a transmission output seal or transmission output gear. Tools and methods of installing the inner primary bearing race are also described.
1 . An inner bearing race comprising:
a proximal end having a first inner diameter;
a distal end having a second inner diameter smaller than the first inner diameter;
a first portion having a cylindrical external wall extending axially from the proximal end; and
a second portion between the first portion and the distal end, the second portion having an internal wall terminating at the distal end.
2 . The inner bearing race of claim 1 , wherein the first portion has an inner wall having a uniform bore.
3 . The inner bearing race of claim 2 , wherein the inner wall of the first portion includes an annular recess.
4 . The inner bearing race of claim 3 , wherein the inner wall of the first portion includes two annular recesses.
5 . The inner bearing race of any one of claims 2 to 4 , wherein the uniform bore of the inner wall is sized to allow press-fitting on a first portion of a motorcycle mainshaft.
6 . The inner bearing race of claim 5 , wherein the second inner diameter is smaller than the outer diameter of the first portion of the motorcycle mainshaft.
7 . The inner bearing race of claim 6 , wherein the inner wall of the second portion is tapered.
8 . The inner bearing race of claim 6 , wherein the inner wall of the second portion is stepped.
9 . The inner bearing race of claim 7 , wherein the tapered internal wall is configured to engage a tapered portion of the motorcycle mainshaft.
10 . The inner bearing race of claim 7 , wherein the second portion has an outer wall having a taper similar to that of the tapered internal wall.
11 . The inner bearing race of claim 8 , wherein the stepped internal wall is configured to engage a stepped portion of the motorcycle mainshaft.
12 . The inner bearing race of any one of claims 1 - 4 and 6 - 11 , wherein the second portion has an outer wall has an outer diameter matching that of the cylindrical external wall of the first portion.
13 . A method of replacing an inner bearing race on a motorcycle mainshaft comprising:
removing a stock inner bearing race from the mainshaft, and
installing on the mainshaft an inner bearing race comprising:
a proximal end having a first inner diameter;
a distal end having a second inner diameter smaller than the first inner diameter;
a first portion having a cylindrical external wall extending axially from the proximal end; and
a second portion between the first portion and the distal end, the second portion having an internal wall terminating at the distal end.
14 . The method of claim 13 , wherein the first portion has an inner wall having a uniform bore.
15 . The method of claim 13 , wherein the inner wall of the first portion includes an annular recess.
16 . The method of claim 15 , wherein the inner wall of the first portion includes two annular recesses.
17 . The method of any one of claims 13 to 16 , wherein the uniform bore of the inner wall is sized to allow press-fitting on a first portion of a motorcycle mainshaft.
18 . The method of claim 17 , wherein the second inner diameter is smaller than the outer diameter of the first portion of the motorcycle mainshaft.
19 . The method of claim 18 , wherein the inner wall of the second portion is tapered.
20 . The method of claim 18 , wherein the inner wall of the second portion is stepped.
21 . The method of claim 19 , wherein the tapered internal wall is configured to engage a tapered portion of the motorcycle mainshaft.
22 . The method of any one of claims 19 , wherein the second portion has an outer wall having a taper similar to that of the tapered internal wall.
23 . The method of claim 20 , wherein the stepped internal wall is configured to engage a stepped portion of the motorcycle mainshaft.
24 . The method of any one of claims 13 - 16 and 18 - 23 , wherein the second portion has an outer wall has an outer diameter matching that of the cylindrical external wall of the first portion.
25 . A kit for replacing an inner bearing race on a motorcycle mainshaft comprising:
a clutch puller;
an inner bearing race puller attachment for the clutch puller;
an inner primary bearing race installer; and
an inner bearing race comprising:
a proximal end having a first inner diameter;
a distal end having a second inner diameter smaller than the first inner diameter;
a first portion having a cylindrical external wall extending axially from the proximal end; and
a second portion between the first portion and the distal end, the second portion having an internal wall terminating at the distal end.