Norton Laydown 4 speed gearbox

Norton Laydown 4 speed gearbox


Norton Laydown 4 speed gearbox needing a check over.

The main case for this laydown transmission is G101. There were other similar ones that had stamps with G102 and GB8. I am not sure whether this is suitable for a Dominator Wideline or Slimline frame. Please see the note below on measuring the mounting widths.

I also have another three laydown gearboxes. Please ask. 

I understand that they all look much the same but with minor differences. For example, the clutch cable entry is a 1-1/2″ threaded tower on some. On others, it is cut down substantially.

However, the main area to consider is the widths of the gearbox mountings. They differ. Always check your frame requirements for these mounting widths.

This G101 Norton Laydown 4 speed gearbox has the following frame mount widths:

  • Upper – 83.5mm
  • Lower – 89mm

Condition of this Norton Laydown 4 speed gearbox.

Norton Laydown 4 speed gearbox

Norton Laydown 4 speed gearbox internals

It is being sold as a transmission that will need to be checked over at the least. I have opened it up and shown what I can in the images, without completely dismantling it. The case looks OK. It has the “Norton” outer adjustment cover. The case threads look OK.

The kickstart, gear shaft and drive shaft splines are all used but still usable on this Norton Laydown 4 speed gearbox.

It comes with the kickstart spring and sprocket that you see in the images. It will need cover fixings.


Other Norton motorcycle gearboxes and parts.

I still have quite a lot of Norton parts available. Many of them are for the Dominator 88 and 99 models. However, I have some pre-war and pre-1930 parts. I happen to have quite a few gearbox parts but they are not all added to the site. So, if this Norton Laydown 4 speed gearbox doesn’t suit your needs, please ask. In the first instance please see all Norton parts on the site here.

Buyer notes for the Norton 4 speed transmission.

Shipping is charged ON TOP of the price for the item. There are too many variables to include shipping in the checkout, so please contact me before you buy and I will give you a shipping price.

I usually ship to most destinations.

International shipping available. Let me know where you are and I will send you a price for shipping with tracking

Combined shipping available. 

Viewing: Please come and check it over before you buy. It is at PE28, near St Ives in Cambridgeshire.

Collection: If you don’t want it shipped, I have plenty of space. If you can’t collect for a while, it’s not a problem. However, I will need to be paid very soon after the sale. Thanks.

Payment: Good old fashioned money on collection is preferred. I can accept payment through PayPal or by bank transfer as well. I can accept EUROS. Please ask. 

Import Taxes: Please note that IMPORT DUTIES are not something I can control. If you are buying from outside the UK, there is a chance that you will have to pay import taxes. Import taxes vary from country to country. If there are charges to pay, it is the buyer’s responsibility to research the cost and pay the duties. The price that you see on my advert is for the item and not the item plus whatever taxes might be due.


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