BSA Fury SS (E35SS) - Post Founders Day Rally Issue Investigations
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- čas přidán 9. 09. 2024
- As many of you will know, the Fury SS accompanied the 750 Lightning to be displayed and hopefully ridden in the enclosure at the 2024 VMCC Taverner's Founders Day rally. The Lightning behaved itself but the Fury would not start although it was firing. Let's begin to find out why - if you're not sick of ignition timing, points and auto-advances that is.
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Always enjoy your efforts Angus. Good day and God bless you and your family.
Thank you Michael - next time let’s hope I’m a bit more successful but at least we now have another plan!
The fun is never ending with older bikes 🤔
Indeed Martin hours and hours of it.
Very interesting ! Enjoy your break, I’ve just been away with the family for a few days and looking forward to getting back on my bike again for the first ride since Founders Day.
Cheers Stew and hope you enjoyed your break. Now back to bikes 👍
A few thoughts from my experience with the '71 Lighting: 1 The Lucas points from period were soft, especially the plate and screws and really made down to a price. They were really working beyond their limits on these high revving bikes. Same goes for the A/R unit. I strobed mine and was horrified at home much the timing jumped about above 5000 rpm. 2 Absolutely use the timing pin as its about the only accurate thing you have to get a starting point. 3 Rub black paint in the lines on the rotor. 4 The 90deg relationship is fixed by the crank so once you get that set move the whole back-plate, don't go moving each point. 5 Get period electronic ign. I fitted a Lucas RITA and it transformed the bike. The strobe line went from a fuzzy blur to pin sharp with a smooth advance all the way to 3000 rpm. The engine was much smoother and much more powerful. The RITA uses a reluctor so all you need to do is get one machined up at 90 deg, there's no A/R and the back plate just has the trigger coil so there's lots of space. You can static time the RITA (there's a little tool) with the crank pin in place and it will be pretty close. 6 if you are really struggling with the over advance there may be different length links for the A/R pins, these are used to adjust the advance range.
Many thanks Rob for the suggestions. Quick responses: Electronic ignition out of the question - too easy and not original. Agree that points were of variable quality but not the issue here I think. Rotor has good marks but agree I need to improve the mark on the cover or use a pin. Agree entirely that I should use a crankpin to initially set timing on the one cylinder. I will also check that the AA cam is not 180 out on its backplate - the more I think about it the more I’ll home in on it as the only thing I have changed since this last ran and I timed it up and marked, is the AS unit. Hope all that makes sense even though you may not agree with me not going electronic. Thanks for input. Cheers.
@@BSAPowerSet No problem. As an aside i actually ordered a Fury new in 1971 and the dealer cancelled the order due to no bikes being available from BSA. Don't dismiss the electronic ignition too soon. Stobe the points set up and see how sharp the timing is. In my experience its pin sharp with electronic and varies over at least 5 deg at high revs with points. These engines are easy to damage if the timing is jumping about. Electronic ignition was common back then because the engine rpm was going above the limit for points and a lot of riders were having problems. The RITA and Boyer sets were big sellers and common fitment, my experience with the RITA was very positive, the A65 pulled hard all the way to the red line, it never did that on points. You can get period electronic ignition sets for reasonable money off e-bay and my advice would be try one, its a fully reversible mod but it could save you from a holed piston.
@@limyrob1383 Thanks Rob I’ll keep that in mind.
Angus, I had a similar problem years ago with my A65T and found out eventually that the cam was one tooth out. Might be worth checking the whole timing side out
Thanks for the thought Alexander; however, the cams can only be installed in one position and remember this bike has already run before I changed out the auto advance to a pattern one to return the loan one.
Hi Angus nice to see the spanners out on the Fury.i am I a muppet or shouldn't you have the auto advance unit locked to full advance when setting the static timing?(Assuming your rotor markings are set at something around 3/8" BTDC).Enjoy your holidays!
Hi Gordon yes you are absolutely right. The technique I employ is to manually move the AA to advance to check when point just open, rather than lock in place - I’ve found from experience that if you lock with oversize washer sometimes the cam slips back a little without you noticing. It’s just my technique.