BSA Lightning Bobber

I have a set but it’s metric. The nut is about 3/4 I think and my biggest socket was 19mm. It sort of went on but didn’t grip enough


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john83 said:
I have a set but it’s metric. The nut is about 3/4 I think and my biggest socket was 19mm. It sort of went on but didn’t grip enough


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ah gotcha, so you need the imperial set, which would come in handy when a metric nut is in between 2 metric sizes too.
 
I think I need whatever standard of measurement will fit on this nut with no corners


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So after working on it for way too long I got that nut off. Unfortunately it took all the threads with it. What a pain in the ass. I suppose I will now be in the market for an appropriate die for that foot peg stud.

Got the primary cover off and tied adjusting the clutch springs for a few minutes to no avail. I suppose the next step is to pull the clutch and have a good look at it.


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Funny how the mind blanks out memories that are unpleasant - like the "joys" of working on old British bikes.

I have to pick up a neglected T140 for complete restoration soon and I am already regretting it.:eek:
 
Have you tried brushing those threads with a stiff steel brush? Looks to me like the threads are full of metal, not missing.
 
Have not tried that yet and it was dark. There may be more left than I think


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I think Irk is right. Looks like the nut left itself on the stud. Which is much better than being stripped.
 
Well anyways I finally got back out there and pulled the clutch out. The plates look pretty good. The friction plates seem to have plenty of friction material left on them. Perhaps they were stuck. I’ll give them a good cleaning before I put them back with some fresh primary oil.

I was looking at some parts catalogs and realized there should be a ball bearing between the clutch lifter and the clutch rod which I seem to be missing.

I’ll get one of those on order, clean the clutch plates, get a new primary cover gasket and see how it goes. Think I’ll order a new clutch cable while I’m at it


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Got parts in but I’m still having issues. Turns out I didn’t need that ball bearing. I thought it went between the clutch lifter and the clutch rod but it’s actually inside the clutch lifter and is in fact there. Installed a new Barnett clutch cable and that fixed a lot of the heavy clutch pull.

I wanted to try out the new cable and figure out the ball bearing so I threw the clutch pack back in. The lever feels good now but the clutch still isn’t releasing. With first gear selected and the clutch lever pulled the bike still doesn’t roll freely. Not sure what I’m missing.


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Maybe back the screws off on the pressure plate ?

From what I've heard the thread should be only just sticking through the nuts

The clutch pull on mine is beautiful compared to my 1981 bonnie that you need to be Mr fucken universe to pull in the lever

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There's also an adjuster in the middle of the pressure plate

The go is to slacken the cable adjuster at the handlebars right off then undo the locknut in the centre of the pressure plate and screw in the slot headed screw until the pressure plate starts moving then tighten the locknut back up and adjust the cable at the lever

Hope that makes sense

Good luck , mate

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So after consulting with folks smarter than me I think that I’m having a couple of problems at once. I think the clutch plates are sticking together and at least the friction plates need replaced. It also looks like the plates have worn grooves in the clutch basket.


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That one doesn’t come with a basket though does it? It’s just the hub?


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From their website: Hubs come complete with cush rubbers, internal spider, plates, center piece and everything as pictured. Again, these are complete hubs that are ready to be installed onto your mainshaft. Probably best to ask them directly.
 
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So I learned a couple things. This footrest mount that I stripped off is a stud and can be easily replaced. Thank the gods. It’s also left hand threads which is why I stripped it in the first place. You live and learn.

I’m about to order a new one, along with the nut and washer. I’m also gonna get new clutch plates on the way and see if those work before I buy a new basket. I’ve got a few primary cover gaskets laying around so I may as well just give it a shot.


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