BSA Bantam - Yamaha Clutch Conversion Part Four The Grand Finale! First on YouTube

The conclusion of my Yamaha Clutch Conversion for the BSA Bantam.
Thanks for watching!
Best wishes, Dean.
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[@retromechanicalengineer]

New Spring Cup and Circlip now ordered to fix the dodgy Kickstarter Ratchet Mechanism. I'm very pleased with how this work turned out. Thanks very much to all who have watched, commented and supported. Best wishes, Dean.

[@Steviegtr52]

It's great to see a project that works out perfectly. Brilliant setup. It will be fit & forget. I did wonder about the outer cover clearance, but not a problem with your mods. Regards. Steve.

[@retromechanicalengineer]

Thanks Steve, it's appreciated.

[@MrFactotum]

Great thorough Job Dean Infact Riveting...🤣🤣👍👍👍👍👍👍👍👍 Nice to see your apprentice helping atb Kev

[@retromechanicalengineer]

Thanks Kev, he's a handy lad that's for sure. I'm glad you enjoyed the series. Best wishes, Dean.

[@LarryBees]

great riveting top class work Jobs a good un Dean!

[@retromechanicalengineer]

Thanks Larry. I'm pleased with the result.

[@makerepairbin]

Nice job of the rivets I have not use rivets like that since I was in school many moons ago. Keep up the good work.

[@retromechanicalengineer]

Thanks very much.

[@montana2strokeracer]

Nice work Dean, very well thought out and executed. It was riveting for sure.

[@retromechanicalengineer]

Thank you Dale. Your support is always appreciated. Best wishes, Dean.

[@oldguysoldbikes]

Congratulations Dean! What great detail work!

[@retromechanicalengineer]

Thanks Jack.

[@OzBSABantams]

Hi Dean, You should be proud of yourself for putting a great set of video's together for this clutch conversion. I saw Ade's comments about your riveting but I would be disappointed if the end result had been anything less with your background ! Whilst riveting is perceived as a bit of a menial task, aircraft standard riveting like that is not known by everyone, and it was a great demonstration and explanation........I actually have some skin pins from my Dad when he worked on Gloster Meteors during the Korean conflict. With the clutch pushrod are you going heat treat it before engine final assembly? These are oil quenched (cherry red first) if you didn't know (which I'm sure you did). I make and sell a lot of those. The kickstart ratchet spring and cup is retained by the wire circlip onto the clutch as one unit and then fed onto the mainshaft and the cup doesn't ride up against the bearing. You probably knew that too! As a side note that ratchet spring and cup Michelle at Rex Caunt happily supplies me so I can supply customers here. I'd have to go to the expense to tool and have things like that made, however we (the retailers) have a great working relationship where we are supplying each other with items we are having manufactured, to maintain a parts supply at reasonable price to all. You've done a great series of video's for this task which will become the benchmark for the future...........I know where to send my customers now when they ask me about this. Great job mate.....

[@retromechanicalengineer]

Bones, thank you very much for your kind words. I will be heat treating the push rod ends prior to final fitment, I'm definitely going to explore a revised clutch lifter arrangement in the future too. I think the Kickstarter Ratchet Spring Cup will need to be replaced too, it does look a bit worse for wear. We'll have to catch up soon, I'll give you a bell when it's convenient for you. Best wishes, Dean.

[@paulhewitt1488]

Dean , thanks for the time spent putting together an interesting and thoroughly informative series of videos. Your teaching ability and willingness to pass on experience gained on the job is first class. Your apprentice couldn’t find a better teacher. Well done 👍👍

[@retromechanicalengineer]

That's very kind of you Paul. Thank you.

[@AGEngineering]

Fantastic job, well done mate

[@retromechanicalengineer]

Thanks Ade, I enjoyed doing this one.

[@carlwilson1772]

Absolutely brilliant, no two ways about it. You have improved on this modification by an order of magnitude. I hope you get a lot more viewers and subscribers and I sincerely hope that anyone who does similar to you gives full credit to you. You have taken what is at best a half way house and engineered it to its logical zenith. Loved seeing Ted getting involved, I hope he enjoyed his Easter egg. Fantastic rivetting exposition. I remember years ago, trying to get a repair done with 3/16 monel csk rivets like those on a Nimrod tail pack precooler duct. Titanium ducting, about half the rivets reacted in the gap and I spent the rest of the day trying to drill out the work hardened swines. Great days.

[@retromechanicalengineer]

Thanks Carl. Monels are fun aren't they?!

[@cainbeeping8480]

Looks great brother

[@retromechanicalengineer]

Cheers Cain. Thanks for your support.

[@cainbeeping8480]

Got the Beer and Nachos for Dale. 😎

[@retromechanicalengineer]

He'll be pleased.

[@AGEngineering]

I've never seen riveting taken to such an art form, amazing result. I would be interested in a demonstration of the riveting done with the air hammer 👍

[@retromechanicalengineer]

I can do that, normally the hammer would drive against the head of the rivet and a reaction block or 'buck' would be used to form the tail. Where an absolutely flawless finish is required, such as on the record breaking aircraft like the Fairey Delta, a shaped buck would be used against the head and the reaction would be 'tail gunned'.

[@TweedsGarage]

Nice job.........but curse you as i haven't even unloaded the Bantam from the van and you've got me looking at Yamaha clutches on ebay 😏

[@retromechanicalengineer]

That's why I did it! Get people thinking. Glad you enjoyed the video. Best wishes, Dean.

[@jonsworkshop]

Great job Dean, your apprentice did an absolutely spot on job! Cheers, Jon

[@retromechanicalengineer]

Thanks Jon, he's a good 'un.

[@cainbeeping8480]

First

[@retromechanicalengineer]

Solid work Cain.