Skip to content
View in the app

A better way to browse. Learn more.

Trials Central

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Comerfords 340 Sherpas.

Featured Replies

  • Replies 65
  • Views 40.1k
  • Created
  • Last Reply

Top Posters In This Topic

Most Popular Posts

  • nigel dabster
    nigel dabster

    Dave Renham is the Bultaco expert and he can correct me all he wants, here goes with what I think is the case. Reg May (RIP) converted the 340's as pretty much Vesty replicas, and for about

Posted Images

Hey Dabster - love the spider web on the rear brake pedal - I know the brakes are crap on Sherpa's but...

Paul Mac

Edited by paulmac

It hasn't been ridden much last few years can you tell?

The rear engine to swingingarm bracket is a standard one with the two engine bolt holes moved back to allow the spindle forward. Angled top with file so doesnt look standard.

Edited by Nigel Dabster

Thinking maybe a fixing at the bottom of this mount to frame would allow forward mounting the pivot as reynolds bike mentioned above?

On the rear frame of the Reynolds bike that i have seen (different to the one in the picture!)

-the swingarm is much longer and goes right up to just behind the front sprocket

and has no swingarm spindle, just bosses between the cases and frame.

It also has a silver frame and airbox and exhaust like vestys (to be sold on ebay today ) 340.

There were 2 different bikes that John Reynolds rode that were modded one after the other.

The one i know of is still owned by an ex comerfords employee.

On the rear frame of the Reynolds bike that i have seen (different to the one in the picture!)

-the swingarm is much longer and goes right up to just behind the front sprocket

and has no swingarm spindle, just bosses between the cases and frame.

It also has a silver frame and airbox and exhaust like vestys (to be sold on ebay today ) 340.

There were 2 different bikes that John Reynolds rode that were modded one after the other.

The one i know of is still owned by an ex comerfords employee.

I was never sure whether the one I have as above was Reynolds but its possible, and as big john says his name is stamped on the engine from this bike. Would love to see a photo of the swnging arm set up can you get one? My main intrest is how they fixed the back engine bracket?

On the rear frame of the Reynolds bike that i have seen (different to the one in the picture!)

-the swingarm is much longer and goes right up to just behind the front sprocket

and has no swingarm spindle, just bosses between the cases and frame.

It also has a silver frame and airbox and exhaust like vestys (to be sold on ebay today ) 340.

There were 2 different bikes that John Reynolds rode that were modded one after the other.

The one i know of is still owned by an ex comerfords employee.

Vesty's frame is white.

Thinking maybe a fixing at the bottom of this mount to frame would allow forward mounting the pivot as reynolds bike mentioned above?

That's pretty much as far forward as you can go (I think).

On the Reynolds bike (I'm assuming the last one before they stopped modifying) the swingarm mount, as mentioned before, is right behind the gearbox sprocket, or, in a vertical line, directly under the carb with no through spindle, just located either side to the frame plates. The front frame tube from swingarm up to seat was bent forward as it descends to move the pivot forwards.

The rear engine mount has some large bracket work to hold it but can't see exactly how it's done in the photo I have (can't post photos) It must be fixed to the frame somewhere.

I see what you mean about the Vesty bike having scalloped rear crankcases now - I thought you meant the crankcases themselves which isn't possible due to the internals, hence my earlier comment, but it is the engine mounting boss that is scalloped away, it doesn't go into the actual crankcase which is what I thought was meant originally.

On the Reynolds bike (I'm assuming the last one before they stopped modifying) the swingarm mount, as mentioned before, is right behind the gearbox sprocket

I can conceive how this was achieved on the sprocket side but how was it done on the primary crankcase side?

Sorry Dabster, I was wrong again.

On the clutch side, the pivot mount sits right up against the clutch case, just above the selector shaft. I'd assume from the way it is done that the engine has to go in after the swingarm is fitted and the engine has to come out to remove the swingarm.

Vesty's frame is white.

Read my post again - i AM talking about the John reynolds bike with the grey frame - not

Vesty's bike which yes has a white frame , which is actually situated next to me.

Read my post again - i AM talking about the John reynolds bike with the grey frame - not

Vesty's bike which yes has a white frame , which is actually situated next to me.

Sorry yes with the two and's in one sentence I misunderstood. It is impossible to move both pivots further forward than the picture above, the only way I can see it would be possible is with only one pivot gearbox sprocket side. Look at vestys bike and the spindle is almost touching the cases, rhs. The only solution would be a very narrow pivot rhs is that how its done? Wouldn't this compromise stability?

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.