Royal Enfield Sprag Clutch Gear Set Assembly – Classic 350/500, Electra 350 UCE, Thunderbird 350/500, Bullet 350/500 UCE, Continental GT 535 (OEM 592593/A)

Fix electric-start slip, grinding noises, or “motor spins but engine won’t crank” with the Royal Enfield Sprag Clutch Gear Set Assembly (OEM Part 592593/A). This is the factory gear set + one-way sprag clutch used on UCE models—designed to transmit starter torque in one direction and freewheel in the other for reliable starts.

This complete assembly is the later, improved design adopted by Royal Enfield and can be fitted to earlier UCE models as a unit—ideal when the original sprag has worn, chipped, or been damaged by kick-back/backfire. 

Each unit shipped by Under The Hood is authentic OEM, QC-checked, and packed to protect the sprag cage & gears. Pair it with fresh engine oil and a healthy battery to maximize service life.

Note: UCE platform only. Not for new J-Series (Classic Reborn/Meteor/Hunter), 650 Twins, or Himalayan.

Key Features

• OEM Sprag Clutch Gear Set Assembly (592593/A)—factory part. 

• Improved design used by RE; suitable as a complete retrofit on earlier UCE/EFI bikes. 

• Stops starter free-spinning/slip; restores positive engagement.

• Supplied as gear set + one-way sprag—no guesswork.

• Built for UCE torque loads; long service life with proper battery/ignition health.

• QC-checked, GST invoice, ships in 24 hrs.

Verified Compatibility (UCE platform)

❌ Not for J-Series (Classic 350 Reborn/Meteor/Hunter), 650 Twins, Himalayan, or older AVL/CI engines.

✅ 100% OEM • ✅ GST Invoice • ✅ Ships in 24 hrs • ✅ QC-Checked

What’s Included

• 1 × Sprag Clutch Gear Set Assembly – 592593/A (complete unit) 

Fitment Tips 

• Replace stator/outer cover gasket if disturbed.

• Ensure battery & starter relay are healthy; weak voltage can kill sprags.

• After backfire events, inspect idler & starter gears; replace if teeth are pitted.

• Torque fasteners to spec; use fresh engine oil post-install.

FAQs 

Q1. Will 592593/A fit my Classic 350 or Classic 500?
Yes—this is the correct UCE sprag gear set for Classic 350 UCE and Classic 500 EFI (and other UCE models listed).

Q2. Is this the “updated” sprag?
Yes— later improved assembly fitted by RE from Aug 2010 and suitable as a complete retrofit to earlier UCE/EFI bikes. 

Q3. What symptoms mean my sprag has failed?
Starter motor spins but engine doesn’t crank, loud grinding during e-start, intermittent engagement—classic one-way clutch failure.

Q4. Does this include all gears?
It’s a gear set with the one-way sprag clutch (complete assembly) as supplied under 592593/A. 

Q5. Can I fit this on J-Series (Reborn/Meteor/Hunter)?
No—J-Series uses a different starter drive. This part is UCE-only.