Clutch Spring (Wet Clutch Pressure Spring) for Royal Enfield UCE 350/500 + Thunderbird 350/500 – 570438/B (6 Springs Required per Clutch)

Royal Enfield 570438/B is the genuine clutch pressure spring used in multiple UCE 350/500 and Thunderbird 350/500 wet multi-plate clutch assemblies. Weak or tired springs reduce clamp force, leading to clutch slip, rising RPM without matching pickup, burnt friction plates, or inconsistent bite—especially after heavy traffic riding or aggressive throttle use.

SOLD AS A SET OF 6 SPRINGS 

This is commonly searched as “clutch spring,” “clutch pressure spring,” “clutch coil spring,” “clutch spring set (6 pcs),” and “570438B spring clutch.” Many sellers do not clarify quantity: one motorcycle typically uses 6 springs—so order 6 pcs for a complete refresh (or match-count what you remove).

Before you buy: confirm your bike is UCE 350/500 or Thunderbird 350/500, and match the clutch type/plate count; if unsure, share your VIN + a clear photo of your clutch spring pocket/pressure plate area and we will verify fitment before dispatch.

Key Features

• Genuine Royal Enfield part: 570438/B clutch pressure spring (wet clutch)

• Restores correct clutch clamping force; helps reduce slip under load

• Critical for longevity of friction plates and pressure plate contact surfaces

• Qty required: typically 6 springs per clutch assembly (order accordingly)

• Suitable for UCE 350/500 clutch assemblies listed in official parts catalogues

• Recommended to replace as a full set for even spring pressure (best practice)

• SOLD AS A SET OF 6 SPRINGS 

• Ideal during clutch overhaul / plate replacement / hard lever or slip complaints

• Supports export buyers: part-number driven ordering reduces wrong purchases

Compatibility Table 

CHECK PART NUMBER BEFORE PURCHASE 

Variants

No variants. SOLD AS A SET OF 6 SPRINGS 

FAQs 

Q1 (Fitment): How do I confirm this clutch spring fits my bike?
Check that your motorcycle is UCE 350/500 or Thunderbird 350/500 and confirm by VIN/EPC or by matching the clutch assembly parts list. If you’re unsure, send your VIN + clutch pressure plate photo and we’ll verify before dispatch.

Q2 (Fitment): Is this compatible with Classic 350 Reborn / Meteor 350 / Hunter 350 (J-Series)?
Do not assume. This listing is confirmed for UCE 350/500 + Thunderbird 350/500 catalogues and major dealer fitment. J-Series uses different assemblies in many cases—verify by VIN/EPC first.

Q3 (Comparison): OEM vs aftermarket clutch springs—what’s the difference?
OEM springs maintain factory spring rate and consistent clamping. Many aftermarket sets vary in rate/length, causing heavy lever feel, judder, or uneven plate wear. For clutch work, spring consistency matters as much as plates.

Q4 (Installation): Do I need special tools to replace clutch springs?
Basic tools only. Tighten spring bolts evenly in a criss-cross pattern, avoid over-torque, and inspect the pressure plate pockets for wear. If replacing plates, soak friction plates in engine oil before assembly.

Q5 (Symptoms): What problems does replacing clutch springs solve?
Common fixes include clutch slip under acceleration, inconsistent bite point, burning smell, and accelerated friction plate glazing—especially after high-heat city usage.

Q6 (Returns-prevention): Should I buy 1 spring or a full set?
Most bikes use 6 springs in the pressure plate. If one has weakened, others are usually close behind. Best practice is replacing all 6 (order qty 6) unless you’re matching-count for a partial service. SOLD AS A SET OF 6 SPRINGS