Triumph / Royal Enfield 'Trifield' 500 trials - third gear jumping issues and causes discussed. 

Always learn a lot from your videos!

It's like that famous supermarket advert - " every little bit doesn't help"

My respect, you always find a way. Time for a beer.

Thanks Paul.

I would be very reluctant to fit additional shims. Most wear in the C range boxes is the selector plate, high gear bush and first gear. I have a free pdf restoration guide on my website.

G'day Paul, l always find the way you explain the process of finding problems as a great learning experience for me and it expands by knowledge too no end, thanks mate, Neil 🤠.

Cumulative error. They improved the selector plate later on, with a strap spot welded across that point that's worn. It's otherwise identical

Really good video....good detective work. I do note that the advert following the video was for Dominos Pizza.....coincidence....or conspiracy!!!!

I had an idea that the mainshaft second and layshaft third pinions may have been the same, so I checked the parts book (877-64). They aren't the same, but it says the mainshaft sliding gear is second rather than third. The good news is that you probably don't need to replace the selector camplate or mainshaft sliding gear. It's also possible that your layshaft shimming will fix the third gear engagement problem as well as the noise. I've learned a lot from your videos, and really enjoy your rides on those lovely local roads. With a little luck, I may hav contributed something back.

Good work on the gear box problem thanks for sharing love the video, my best wishes to you from the Philippines ❤️💪👍😉😀😁🏁🏍️🛺🐑🇵🇭🏴󠁧󠁢󠁷󠁬󠁳󠁿

Hello Paul, just found you on here. We've met a few times over the years, I'm a friend of Andy Sumner (Blondie) I own and ride 1960 T110 lived in Ffarmers until 2020 when I had yo move back to yhe East Midlands. Anyway good to see you're still working on the bikes and you're looking healthy.

Could the bush on the selection forks be replaced to give better engagement in the selection plate?

👍

Great piece of deduction Paul. You've certainly earned your Friday night bottles of beer to wash your pizza down.

cannot fault your logic, Paul. Are these parts readily available?

Wow!

Hey Paul. i wonder. would these same symptoms in the gearbox apply to an BSA A65 gearbox as well? , ive got an 1965 "E" that likes to jump out of 3rd gear when riding the throttle any more than a gentle take off.

A pizza cake paul

How easy is it to obtain replacement parts such as this? Bearings are usually generic but what about the other bits - new old stock, good used or remanufactured?