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.

Bultaco M91 1973-4 Sherpa T - Standard Rear Sprocket

  •
rplant
in Sherco

Featured Replies

Does anyone know what the standard rear sprocket is for the M91? My

bike was fitted with a jury rigged smaller sprocket that is not even a

bultaco sprocket... I need to buy a new one and want to get the same

number of teeth that came with the bike from the factory... thanks...

  • Quote

    14T in the front and 52T in the rear. But maybe for the actual classic trials it is a bit long.

  • Quote

    Greeves is as always spot on, if you call Dave Renham at Bultaco UK he can supply various sprockets etc in 428 and 520 sizes. Mine runs a 46 tooth rear sprocket

  • Quote

    • 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...
    Go to topic listing

    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.