1968 BSA A65 Lightning project (Part 3 OF 4)
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- Опубліковано 19 сер 2024
- Here are a few clips of some of the little jobs involved in trying to get to the root cause of the problem with John’s BSA Lightning, which is having difficulty in changing gears. Specifically changing down from third into second gear.
As you’ll see from the video, we spent a little time “dressing“ the end face of the cam plate, to see if we can smooth out the ramp and remove a little indentation between third and second gear.
We also dressed the cam plate plunger, which had become a little worn.
The second part of the video contains some clips from a “tech session“, during which a few friends came around to reassemble the Lightning.
I suspect that the clutch adjustment was the main cause of the problem, although there were several problems identified during the dismantling and investigation of parts.
We had a great time and accomplished a lot. The final steps shouldn’t take too long and then we can let John have his bike back to see if our work has fixed the problem!
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I had the same issue with my 3 to 2 shift on my Spitfire and it was simple, just the return spring on the gear lever, replaced that to get more return and it was solved. Thank you for the great content, helps your fellow enthusiasts!
Hi Ehab! Thanks very much for your note. The Spitfire is an amazing bike! Much appreciated. Best wishes, Mike
Nice work guys
'Many hands make light work' well done guys, looks like it could be a 'nightmare' one man job Mike.
Hope it all works well on the road test, thanks for sharing.
atvb t ..
Hehe, thanks Terry, many hands make light work... unless they are all chefs in the kitchen!! And my garage is a small kitchen ;)
@@TheMightyGarage Ha Ha! Too many cooks, maybe? Keep them coming. Very relaxing watching you work.
Enjoying the progress, keep it going.
Another superb job.
We're nearly there!! 2 more videos and hopefully we will hear this bike roar into life again!! ;)
Great work!
Thank you Iivari! Best wishes, Mike
hi started watching this and went down to my shed i have a spare cam plate andno grove like channel on the top where you were dressing
Thanks a lot Richard for this info. Cheers, Mike
What a faff it is fitting the drive chain
Swap the gears around, but second gears on opposite shaft, use the other side of the dogs.
Filing the ramp on the cam plate...?! I thinking in terms of engineered tolerances of removing designed specifications is similar to gear gogs in old pendulum clocks after extensive wear opens up the space between the gogs causing the pendulum to stop swinging. Make sure to keep in mind after receiving feedback.
Good luck.
Thanks Ken, we only took a little off but appreciate your points. I think a new cam plate will be needed in the future for sure. Best wishes, Mike
How to adjust primary chain on 1969 650 BSA thunderbolt
Hi Tim, there's an adjustment bolt/screw that you may see underneath the primary case. It passes through the case and pushes an adjuster band/strip inside the case that pushes up against the primary chain, therefore tightening it. Hope this helps. Cheers, Mike
Very descriptive video! I notice there is no provision for an oil sending unit on this A65, same as mine. Is there an alternative way to keep tabs on oil pressure for this engine?
Hi, you can fit an oil pressure gauge on most of these old vintage bikes. Mike has one discreetly fitted to his A50 in this video. They work very well. Cheers ua-cam.com/video/zb0FFAMy6-k/v-deo.html
Hello. I need a cluch endcover assembly #19-7801 or 57-3705 do you have this part, what is the price? or do you hnow who can sell it to me? Thank you very much. I live in Spain.
Hi Carlos, I just did a quick google search and it looks like they are fairly available online. Cheers, Mike
@@TheMightyGarage Thank you
Where did you get that tool to tighten that gearbox sprocket ?
Hello, it’s just a regular 3/8” torque wrench with a whitworth socket on the end. Cheers
@@TheMightyGarage I am trying to tighten it with the transmission in place
I’m sure that you know that you can press on the brake while you tighten or very carefully fit a little plastic or wooden wedge into the teeth of the chain. That should hold it while you tighten.
@@TheMightyGarage yes I know that , When I watched your vid again i noticed your trans was out when you torqued it . I need to find a socket deep enough to fit over the transmission out drive shaft and the nut .
Hi Mike, Did you soak the clutch plates in oil?
Hi Geoff, great catch! We have gone back and forward about soaking or lightly oiling the clutch plates or leaving them dry and decided to let John take the bike for a little ride first. The whole clutch needs to be completely adjusted again as he has a new pushrod, cable, springs and plates. Best wishes, Mike
What were you smearing on the gasket?
shoshone3 Hi Shon, we used a very thin smear of Wellseal jointing compound on both sides of the gasket. I normally use grease, but he preferred to use some jointing compound. We’ve taken the case off since and luckily, the gasket did not tear. Best wishes, Mike
How well done was all this work back in the day when these bikes were built?
It was spot on back in the day, what he is doing here is reversing 50 years of wear, or restoring it as close to new as possible.
Be under no illusion, I've driven mine hard and regularly in the past three years and it's Never missed a beat. These were well built machines and if given regular maintenance (which they hardly ever got) would provide excellent reliable performance