Sidecar forks allowing wheel to remain vertical with machine leanout?

[TRFell]

Bought what l think are a matched pair of forks. The fork action tightens up when end caps are tightened. On closer inspection the end caps are different thickness same overall slider length with end caps on. 4 mm shorter on brake side with end caps off. The spindle angle is not at 90degrees to slider it is greater than 90degrees on brake side and less than 90degrees on near side. The wheel therefore is not parallel with the forks and top of wheel leans towards the near side fork.
What is going on here?
The only explanation l can give is the forks are designed for sidecar use to compensate for lean out of machine, but l need them for solo use?
Thanks for any suggestions

[Y13 Alan G]

I have 3 pre-war BSA Sidecar outfits and must admit I confused as to your description and problem. All BSA pre-war girder forks are exactly symmetrical both sides. the only differences are the length of the links depending on solo or sidecar use. My earliest BSA sidecar is 1927 and the latest BSA 1939/1947 and although different in size, one for my 1929 Sloper and one for my 1938 Y13, the girder forks  are of almost identical construction. The lean out and toe in for sidecar alignment is carried out by adjustment of the front tubes of the sidecar chassis.
I don't believe BSA ever made any non-symmetrical girder forks, as they would have created severe steering problems. I'm will to help if you could post pictures and the dimension differences so I can try and see what is going on.

[Y13 Alan G]

Re my earlier post, it appears you are referring to telescopic forks and not girder forks. I also have a few BSA's with telescopic forks and both front fork legs MUST be the same length.

[TRFell]

Thanks Alan for your information
The issue is resolved now, the wheel spindle on some A65 later twins were positioned at 91 degrees to the brake side fork slider and at 89 degrees to the near side fork leg if my trigonometry is correct this positioned the top of the front wheel about 3/8 inch nearer to the near side fork leg
It all seemed quite illogical at first but those with the knowledge have enlightened me