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« on: June 25, 2018, 11:02:26 AM »
BSA A10 gear box. Got a problem that I can’t seem to get to the bottom of. Initially when I first go for a ride and everything is cold, the gear change is noiseless and smooth. Selecting neutral from either 1st or 2nd gear while stationary is easy and reliable. After everything has warmed up selecting neutral becomes very difficult, and the best way I can describe it is that gear shift almost feels as if it is seized solid and will not select neutral at all. This happens after about 15 miles or so. I have replaced the selector forks, and “claw” in the gearbox, and spent a long time setting up the clutch with a dial gauge and according to the guage the pressure plate is lifting absolutely square (four spring clutch with SRM ally pressure plate and radial bearing fitted to the clutch push rod). I have replaced the clutch springs, cups, and spring adjusters too although these symptoms were there before which is why I replaced these items. Gearbox oil is 50 weight and primary chain case has ATF in it. While riding along the gears change just fine, and it is not until I stop and try to select neutral that I notice any problem. I am lost as to what to investigate next. Anyone got any ideas or suggestions as to what might be the cause of this problem?