Royal Enfield Lay Shaft Assembly (4-Speed Gearbox) for Bullet 350/500, Electra 4S, Lightning 500/535 | 111194/1

The Royal Enfield Lay Shaft Assy (Part No. 111194/1) is a critical internal component of the 4-speed gearbox used on select older/“Non-UCE” Royal Enfield platforms.  If your motorcycle shows symptoms like hard shifting, noisy gearbox (whine/grind), jumping out of gear, excessive play, or uneven gear engagement during a gearbox overhaul, a worn layshaft assembly is often a root cause.

Unlike generic aftermarket shafts, this is listed as a genuine OE-spec replacement for applications where 111194/1 is assigned, ensuring correct machining tolerances and proper gear alignment under load.  For best results (and to reduce repeat teardown), it is recommended to inspect/replace bearings, bushes, shims, and mating gears during the same rebuild.

Important: this part is for specific 4-speed gearbox fitments only—it is NOT intended for UCE/J-Series/650 Twins or newer 5-speed systems unless your exact model is confirmed below. 

Key Features 

• Genuine Royal Enfield Lay Shaft Assembly – Part No. 111194/1

• Designed for 4-speed gearbox applications (legacy/non-UCE platforms)

• Restores smooth gear engagement and correct shaft alignment during gearbox rebuild

• Helps address gearbox noise / rough shifting / gear slip caused by shaft wear

• OE-spec machining for reliable fitment and longevity (application-dependent) 

• Recommended to install with fresh bearings/bushes/shims during overhaul (best practice)

• Reduces repeat failures compared to mismatched local shafts when correct model is chosen

• Ideal for workshops and restoration builds where accuracy matters

Compatibility Table (PLEASE CHECK PART NUMBER BEFORE PURCHASE)

Part Number: 111194/1 – Lay Shaft Assy (4-Speed Gearbox) 

Explicit Exclusions (to reduce wrong orders / returns)

• Not for UCE (Classic/Bullet UCE), J-Series (Classic Reborn/Meteor/Hunter/Bullet 350 J), 650 Twins, Himalayan/Scram, or newer 5-speed/6-speed gearboxes unless your microfiche confirms 111194/1. 

Variants

• No variants (single part number 111194/1)

FAQs 

1) Is this compatible with Classic 350 Reborn / Meteor 350 / Hunter 350 (J-Series)?
No. Those use J-Series components and different gearbox architecture. Order only if your model’s parts catalog confirms 111194/1. 

2) Will this fit my UCE Classic 350/500?
Typically no—UCE gearboxes differ. Please match by part number from your microfiche/old sample before ordering. 

3) My bike is called “Standard 350/500.” Can I order this?
Some catalogues list Standard 350/500 under legacy Bullet naming. Treat it as ❓ Verify: confirm you have a 4-speed gearbox and match part number before purchase. 

4) What symptoms suggest layshaft replacement?
Hard shifting, gearbox whine/grind, slipping/jumping out of gear, or excessive play found during teardown are common indicators (diagnosis should be done by a mechanic).

5) Do I need any other parts with it?
Strongly recommended during rebuild: inspect/replace bearings, bushes, shims, and mating gears to prevent repeat failures.