Originally Posted by
3speedslow
Well I am focusing on the BB rebuild now but have run into some of the usual problems. Worn cups. At least the axle is still good. Went to measure and found out the BB length is 70mm. Then put the micrometer on the axle itself, 130mm. Yow!
Will look in my stash to see what cups I have to use but hoping a sealed unit can work....
It's a good thing that the spindle is OK because many of the Sekine from this era used the SR Silver crankset, which uses a rare 3 degree taper instead of the standard two degree taper. If so, you are not going to find a sealed cartridge unit that is compatible with these arms. Check the markings on the spindle. it sounds like you may have a 5K or 5M spindle, which are three degree taper. The model should also be embossed on the crank arms.