Tiger cub Ignition Mount - Part 1 // Paul Brodie's Shop

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#triump #tigercub #ignition #fussyframebuilder

[tomfortson]

Hey Paul, I love it that rather than fuss and fume about the vendor that refuses to help you out, you dive in and solve the problem! I agree with @Larry Palmer in that your solution is truly elegant. Watching your videos is GREAT THERAPY! Thanks a bunch.

[speedpedals]

Paul, I am following this build with a lot of interest. You do very nice work.
Back in the '70's, I had read a motorcycle publication about installing a Chrysler electronic ignition system onto a Triumph twin. At the time I was building my BSA 441 to have fun in the dirt and actually competed in motocross a handful of times. The timing of the article was perfect for my build.
Since I owned a Chrysler ECU box - the control unit, I had to purchase the connector (which I think I got at a salvage yard), a new 12V auto ignition coil, ballast resistor, Slant 6 reluctor (6 lobes instead of 8), transducer (pick up coil), and a coil bracket. I disassembled the BSA advance unit and machined off the cam lobe for the points, making the OD the same size as the ID of the reluctor, then I brazed them together and filed off 5 of the 6 reluctor lobes (poles?). The taper mount of the 441 advance unit is not keyed so position did not matter for timing purposes. When complete, the advance weights and springs were reinstalled. I removed the points from the point plate and installed the transducer. I honestly forget if I had to drill and tap a new hole or use the original. I lined up the transducer pickup with the reluctor lobe and torqued down the bolt. Timing was done by adjusting the original point plate. It fits under the original cover. I get a fat blue spark and the spark plug is opened to either 0.080" or 0.060", has never misfired and only pings if I am in say 4th when trying to pick up speed from a walking pace. This is with, if memory serve me, a 10.0:1 compression psiton and a Norris flat track regrind cam. Sad Norris is no more.
BTW, I mounted the ECU on the back side of the front number plate. The alternator powers only the ignition and utilizes the Triumph capacitor held upside down in the mounting spring and the Zener diode was retained along with the heat sink. Coil and ballast resistor can be mounted anywhere. I brazed the coil bracket to the upper frame tube and "kinda" hides it nicely under the original BAS 441 gas tank. Mounting this system on a Triumph causes a wasted spark because it requires 2 lobes to be left on the reluctor exactly opposite each other. The wasted spark presents no problems and the B40 does not have this issue being a single cylinder. Rock Auto here in the states has all the parts at the lowest price but, the connector for the control box is expensive, about $80.00. It is also becoming rare to find these parts in a salvage yard.
This was an extremely satisfying modification for me.
CAD design, Cardboard Aided Design. Love it.

[leebatt]

“Wreaking of Mickey Mouse”. I’m gonna borrow that phrase Paul, it describes the vast majority of my projects to a tee. Thanks! Keep on Mickey Mousing good sir!

[ogcodaweber]

I love this. “Oh you’re not going to help me out or sell me the parts I need? Well let me just make your product but better.” Hahahaa

[nigesbasementworkshop]

I need a PVL ignition for my trials cub here in the U.K, great advertisement for Feked off who won't be benefiting from my custom now. I guess you reap what you sow.

[grahamsmith]

It's so much more fun when companies wont sell you stuff. Great solutions Paul

[timheron]

Paul, I certainly had a good chuckle at your CAD remark, made my morning! That aside, the old "cardboard template" trick is still an extremely useful and valuable workshop tool, especially for "one offs", as you are obviously well aware.
Thank you so much for sharing your time, processes, and of course, your humour.
Also, Mitch, love your work!
Tim

[rickfazzini]

Its so cool to watch you work out problems, I like that you don't go to the computer and draw it up or use a hand scanner 3D thing Just some carboard and holding pieces up to pictures and what you call Mickey Mouse to me just seems to make since and time saving. Thanks for sharing your talent and thanks for capturing it on camera Mitch! Have a coffee on e guys!

[gordonhenagar]

Totally enjoy seeing you solve problems that will plague the bike from now on if you don’t. Keep up the good work!

[johnb]

It would seem that Feked off, basically told you to feke off. Good for you, coming up with your own solution.

[pebrede]

Hi Paul,
Your 5/16 BSF thread form is 55 degrees which is close but not the same as metric / UNF and a unf thread form thread could be used but will not fit well, as you have illustrated.
Peruse the Whitworth section of MacHenry’s handbook and you will see the differences between the 2 forms.
Fortunately there are NPT insert cutters, which are 55 degrees/Whitworth form, that will cut the correct thread for you, from McMaster-Carr and others.
A nice Cub and I look forward to seeing it finished.
Take care and stay safe.

[toronto]

Regards from Squamish always one more thing before the finish line.

[davidminarik]

I'm impressed once again! I would never be so brave.

[billdyke]

Just checked out Feked on the net. The consensus seems to be that they are a rude bunch of shits. Anyhoo, excellent video, as always. Many thanks.

[trevorreeves]

Just coz it can't be bought doesn't mean it can't be made. Great thinking outside the box. T

[tarouyamada]

2am over here, can't sleep, might as well enjoy some chill bike content 👍

Bike building is hard, all those bespoke parts... good to see someone who knows what they are doing. Great content!

[jonofalltradesmasterofnone]

Paul
Off to TALMAG tomorrow I’ll get some pictures of the trials cubs for you. I’m surprised that the English company wouldn’t help you but their name is a play on words. I do love the way you just overcome issues without batting an eyelid.
Rgds Jon.

[h-j.k.]

Really good problem solving👍 I used to put these kind of ignition systems on Ducati singles, for this I built a mashine that allowed me to adjust the Iglition outside of the engine. The wires were then routed through the Breather and out of the breather-bottle.

[raynyhus]

Nice solution to a interesting problem.

[stevenhoman]

You come highly recommended by Matt Hudson from the Workshop channel. You are indeed the real deal.