Recent posts

#1

Technical Information and Photos / Re: New Gear Change and Igniti...

Last post by HOCAdmin - November 29, 2025, 07:13:41 AM

It looks like Mick's proposed linkage he was testing would have been more direct and positive.

#2

Technical Information and Photos / Re: New Gear Change and Igniti...

Last post by David S - November 19, 2025, 10:34:06 AM

Mick's modified gear select mech didn'y carry forward.

Here's a comparison; fire damaged unique modified mech with standard production mech.

So, what's going on?

Could this be an easy mod to implement?

What would be the benefit?

#3

Maintenance, Repairs, Upgrades and Improvements / Re: Update to 'Changing the Sp...

Last post by Dave Snr - October 27, 2025, 03:35:45 PM

Hi Jack,
The updated write up is in the Technical section on the club website.
You'll need the members password to access the Technical section - It's in Sock 143, May 2024, page 14, or you can email me and I'll email it back.
There have been many write-ups in the Sock on Sprag replacement over the years, the last one was by Rich Woodcock in Sock 144, Sep 2024, which helpfully mentions all the shims that need to be in place.
Happy reading.
Dave H

#4

Maintenance, Repairs, Upgrades and Improvements / Re: Update to 'Changing the Sp...

Last post by jackb - October 26, 2025, 10:58:57 AM

The link to changing sprag is reporting. Link is broken???
Any help much appreciated.

#5

Technical Information and Photos / Re: New Gear Change and Igniti...

Last post by HOCAdmin - October 26, 2025, 07:42:49 AM

That's good to know. It would have been interesting to understand whether the gear change improvements had worked on Mick's Vampire if it had survived.

#6

Technical Information and Photos / Re: New Gear Change and Igniti...

Last post by velocollins - October 21, 2025, 03:52:35 PM

It is not clear whether the mods were ever deployed to production or whether they were just on Mick's prototype bike.

Added timing cover drawing for reference.

#7

Technical Information and Photos / New Gear Change and Ignition T...

Last post by HOCAdmin - October 21, 2025, 12:07:27 PM

This image was recently provided by Mick Broom.

#8

Maintenance, Repairs, Upgrades and Improvements / Re: Valve Clearances

Last post by Miti - August 06, 2025, 10:31:35 AM

Hi Jeff i have finally managed to get on to the forum hoping to open up some photos of the inside of one of these hesketh engines . your valve clearance post seemed as good as any , however when i click on pic it opens up something about sky holidays 2024 , internet carrier near me , and iphone holiday deals any idea whats going on or is it me

Hi Mark.

Nope. My old website was taken down a wee while ago, so pic links now lead to 'wherever'. I'll try and go through the forum and correct links, where possible. May take some time though...🙄

Jeff

#9

Maintenance, Repairs, Upgrades and Improvements / Re: Sprag

Last post by Miti - August 06, 2025, 10:17:11 AM

Hi Jack. The original Sprag replacement write-up I did was based on my own bike. Turns out my prototype engine hasn't got the wire circlip that holds the Sprag in-situ, so I never mentioned it...

That circlip needs prising out before the Sprag will come out.

Hope you realised this before now?

Jeff

#10

Requests for Help and (Hopefully) Answers / Re: Brembo Rear Brake Master C...

Last post by HOCAdmin - June 20, 2025, 07:03:42 PM

Dave,
Based on my experience most Triumph's with Nissin rear callipers such as the 955i and 1050 Tiger etc use the Nissin rear master cylinder with a 14mm piston. The thickness of the disc and pad material is also critical.
You may wish to try a second-hand Nissin Triumph 14mm master cylinder with remote reservoir before investing in a PS15 as I believe the Nissin plunger piston stroke is also longer.