September 16, 201015 yr Hi Guys Bsa B40 with wd ratios Sometimes will ,but mostly not select 4th Then will not select 3rd Gearchange is a bit wooly New plungers on the gearshaft new bearings etc Tried differnt quadrants Anyone no where to look next? Marty D
September 16, 201015 yr I had a similar problem once with a B25 g/box. I had somehow assembled the box such that the output shaft was shimmed too far towards the clutch and I could only engage gears 1,2, and 3. Check the primary chain alignment i.e. clutch teeth aligned with the engine sprocket, if the clutch is too far out then this may be the problem, otherwise hopefully someone else has a better suggestion, good luck.
September 17, 201015 yr Author Had a look the clutch dosent appeared to have moved out of line Is the gear tight to the output shaft/clutch 1st or 4th? Going to have to let a Proper Bsa mecanick tinker Marty D ,
September 20, 201015 yr If you go to www.classicmotorcycles.org.uk will find some useful technical information and there is blown up dwg of the gearbox cluster that maybe helpful.
September 20, 201015 yr Author Thanks will take a good look and see if i can find iut whats going on Saying that i see that the input shaft(clutch) has a considerable float When levered the shaft will move back and forward Marty D
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