BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: tdc on 13 Aug, 2023, 22:46

Title: bb33 std gearbox .
Post by: tdc on 13 Aug, 2023, 22:46
Any idea why 2nd to third is notchy on the downard change ? Thanks in advance .
Title: Re: bb33 std gearbox .
Post by: Jim S on 14 Aug, 2023, 13:00
TDC

The first thing I would check is the clutch. Maybe it is dragging when you disengage it. Remove the primary cover and check that the outer plate is lifting evenly when you disengage the clutch. Adjust the spring load to get the outer plate lifting evenly. I am assuming you have the 6 spring clutch.

Also with the clutch disengaged, use the kick start to rotate the clutch and check that the outer plate doesn't have too much wobble when rotating. If it wobbles too much, it could mean the back clutch plate is not seated well or is warped.

If all is well with the clutch, you will need to start looking at the gearbox. Maybe the 3rd/4th shifter fork or dogged wheel are worn...

Jim
Title: Re: bb33 std gearbox .
Post by: tdc on 14 Aug, 2023, 22:31
Thanks Jim .I am thinking that it is the gearbox but I am getting a nice bike lift soon so will be able to poke around in relative comfort !  !
Title: Re: bb33 std gearbox .
Post by: Jim S on 16 Aug, 2023, 12:39
A bike lift. Luxury!

Let us know what you find.

Jim