motomech
10 MW
One of the nice things about the "Cuties" is the ease one can swap different "cores" into one housing.
It was with this in mind that I ordered a pair of "201"slow wind motors to replace the two 328 "fast winds" in my 2WD Rocky Mountain.
Dropping the front Q100H 201 in place of the standard Q100 328 was a piece of cake, but as I looked at the rear CST's, I realized there was a problem.
Even though the 328 was less than a year old, there are substantial changes to the lastest version.
In the first place, they replaced the original 2mm narrower CST clutch with the standard clutch;
And there are changes to the screw-on cover plate as well;
Old style(silver), new style(back)
Less intricate casting with a smaller bearing(and different axle shaft to match the bearing).
Old style had removable spline housing, new does not. New cover is flat.
The hub/housing appears to be the same, but on the brake side the axle shoulder has been shortened:
Old motor shaft(in new housing for pic ease). 12 mm
New motor shaft;
7 mm
It's clear that they are trying to move the motor over toward the cassette side do lessen the extreem amount of dish needed to center the rim on the original CST. The problem is, even with the long 12 mm axle, I have to add a 1 mm flat washer to center the disc to the caliper. Good for those willing to move the caliper or have V brakes.
Now here's the part that has me stumped at the moment.
The gear counts on the old 328 are; 15T(axle), 39T(big nylon), 28T(sm. nylon), 77T (ring gear), which, if my math is correct is 5.1 to 1
The new motor, which is supposed to be a 201, they are; 15T(axle), 39T(big nylon), 23T(sm. nylon), 74T(ring) = 4.9 to 1
Could it be possible that the motor speed differences come almost totally from different winds?
Or more likely, has BMS B. sent me the wrong motor. I'm away from my shop, so I can't really test it now.
Here is what the sticker looks like;
I would think the 26" wheel referance would mean it's a 201
Bottom line;
"Swapping" the old and new styles of the CST is not the "Close your eyes and drop it in" proceedure that it is with the other versions of the Q100.
It was with this in mind that I ordered a pair of "201"slow wind motors to replace the two 328 "fast winds" in my 2WD Rocky Mountain.
Dropping the front Q100H 201 in place of the standard Q100 328 was a piece of cake, but as I looked at the rear CST's, I realized there was a problem.
Even though the 328 was less than a year old, there are substantial changes to the lastest version.
In the first place, they replaced the original 2mm narrower CST clutch with the standard clutch;
And there are changes to the screw-on cover plate as well;
Old style(silver), new style(back)
Less intricate casting with a smaller bearing(and different axle shaft to match the bearing).
Old style had removable spline housing, new does not. New cover is flat.
The hub/housing appears to be the same, but on the brake side the axle shoulder has been shortened:
Old motor shaft(in new housing for pic ease). 12 mm
New motor shaft;
7 mm
It's clear that they are trying to move the motor over toward the cassette side do lessen the extreem amount of dish needed to center the rim on the original CST. The problem is, even with the long 12 mm axle, I have to add a 1 mm flat washer to center the disc to the caliper. Good for those willing to move the caliper or have V brakes.
Now here's the part that has me stumped at the moment.
The gear counts on the old 328 are; 15T(axle), 39T(big nylon), 28T(sm. nylon), 77T (ring gear), which, if my math is correct is 5.1 to 1
The new motor, which is supposed to be a 201, they are; 15T(axle), 39T(big nylon), 23T(sm. nylon), 74T(ring) = 4.9 to 1
Could it be possible that the motor speed differences come almost totally from different winds?
Or more likely, has BMS B. sent me the wrong motor. I'm away from my shop, so I can't really test it now.
Here is what the sticker looks like;
I would think the 26" wheel referance would mean it's a 201
Bottom line;
"Swapping" the old and new styles of the CST is not the "Close your eyes and drop it in" proceedure that it is with the other versions of the Q100.