Royal Enfield Kickstart Lay Shaft Bush (Gearbox) | Standard/Electra 4S/Lightning/Machismo | 112029

If your Royal Enfield’s kickstart feels rough, develops side-play, or the gearbox starts sounding “dry” or inconsistent during engagement, the Lay Shaft / Kickstart Lay Shaft Bush (Part No. 112029) is one of the small but critical wear items to inspect. This bush supports the lay shaft area associated with kickstart/gearbox operation and helps maintain correct shaft alignment—reducing abnormal wear, noise, and uneven load on mating components. 

This is a genuine-spec replacement part number commonly referenced as “Bush, Lay Shaft / Kickstart Layshaft Bush”. Replacing it at the right time can prevent repeat failures and improves long-term gearbox smoothness—especially on older Royal Enfield platforms where mechanical tolerances and kickstart usage are higher.

Important: this part number is for older Royal Enfield model families listed in the Compatibility section below and is not meant for J-Series, UCE, or 650 Twins unless you have a microfiche confirmation for your exact chassis/engine variant.

Key Features 

• Genuine replacement specification for Royal Enfield Part No. 112029 

• Commonly listed as “Bush, Lay Shaft / Kickstart Layshaft Bush” 

• Helps restore correct shaft support/alignment to reduce play and abnormal wear

• Improves kickstart/gearbox feel when worn bush is the root cause

• Recommended during gearbox overhaul / preventive rebuild on older models

• Compact, cost-effective part that can prevent larger gearbox damage when replaced on time

• Verify fitment by model + year + engine family before ordering (see notes)

Compatibility Table (PLEASE CHECK PART NUMBER BEFORE PURCHASE)

Fitment is compiled from dealer catalog fitment lists and cross-references for part number 112029. 

Variants

• No variants (single part): 112029

FAQs 

1. What is 112029 used for?
   It’s commonly referenced as a Lay Shaft / Kickstart Layshaft Bush used in the gearbox/kickstart-related lay shaft support on older Royal Enfield platforms. Will this fit Classic 350 (UCE) or Classic 350 Reborn (J-Series)?
   No—do not order for UCE or J-Series unless you have an official parts-catalog confirmation for your exact model. This listing is for the older model families shown in the Compatibility table.

2. What symptoms suggest this bush needs replacement?
   Typical symptoms include kickstart roughness, abnormal play/noise, inconsistent engagement feel, and accelerated wear found during gearbox inspection.

3. Is professional installation required?
   Recommended. Installation generally involves gearbox-side access and correct sizing/fitment practices; improper fitting can cause repeat wear.

4. How do I confirm fitment before ordering?
   Match your bike’s exact model + year + engine/platform and compare against the Compatibility table; if your model is marked ❓, confirm via microfiche before purchase.