Can I use BT Bearing cups " or is it a Special Servi only cup ?
Big twin cups fit any post '57 Servi frame that originally came with a wideglide as the head casting is different than earlier ones. All '58 and later Servi-Cars used 1" stems. All Pre'58 Servi-Car and '52 and earlier 45 are 7/8ths with Springers. My mistake was assuming he had a frame for a wideglide Servi, which I do not know to be true. Your mistake is claiming all are 7/8ths!Big twin cups will not work on 45 or servi .They are 7/8 in stem Big twin is 1 in.They make a kit to run 7/8 stem on a big twin.But to go the other way 1 in to 7/8 in .You can turn down the male end of a Big twin cup to fit 45 servi frame and run the BT cups.
iiggii,Also remember Bt neck is 5 1/2 in and the servi and 45 are 5 in neck length.
I was speaking of older springer frames. But seems you know all .For this iam sorry.iiggii,
The '58 and later Servi-Car neck casting is the same length as a BT frame and the stem on a servi-Car fixed rake glide is the same as BT. Stem length is not an issue on'58 and later Servi-Cars with wide glides.
And I also have been sort of paying attention to Scavenger's questions so pretty much had a head start on answering his initial question!
You claimed you had a '60 frame. That would use BigTwin cups. Perhaps your frame is not what you think it is? Do you even know what you have?? I can't help it if you don't have a clue. And don't expect any more help from me!WRONG !,,wasted $ and can't even use em
anybody got a set of WG cups for a servi-car ??