Royal Enfield 570798/A – Digital TCI Unit (Twin Spark) for BS4 Classic, Bullet, Thunderbird

Royal Enfield 570798/A - DIGITAL TCI UNIT ( TWIN SPARK WITH 3 PIP )

The Royal Enfield 570798/A Digital TCI Unit (Twin Spark) is a genuine electronic control unit designed specifically for BS4 UCE Royal Enfield motorcycles. This TCI unit plays a critical role in precise spark timing and ignition control for smoother performance, consistent combustion, and reliable cold starts. It is a plug-and-play replacement for select BSIV-era Royal Enfield models.

If your bike is misfiring, facing ignition failure, or struggling with cold starts, this is the OE-grade solution trusted by service professionals.

Key Features

• ✅ Original Royal Enfield Part – 570798/A

• ✅ Compatible with BS4 UCE engines only (not BS6)

• ✅ Digital Twin Spark Ignition system for efficient combustion

• ✅ Improved throttle response and reduced misfires

• ✅ Plug-and-play fitment for listed models—no wiring changes required

• ✅ Long-lasting and reliable performance under Indian road conditions

• ✅ Backed by RE-authorized part suppliers

Verified Compatibility

This part is compatible with the following verified BS4 Royal Enfield models:

Classic 350 BSIV – Rear Disc & ABS Variants

• Classic 350 ABS – All verified BS4 VIN prefixes (VVNP46X*, VTFV46X*, VWTM42*, VJWL46X*, etc.)

• Classic 350 S-ABS – VFYM46X*, VXXJ46X*, VGHX46*

• Classic 350 Rear Disc – 1800380, 1800381, VNCR42AH, VNCR42SS, etc.

• Classic 350 BSIV Standard Models – 1800201 to 1800206

Bullet 350 BSIV – ES, KS, X, and Disc Variants

• Bullet 350 ES ABS – VDLS46*, VNCR46BB

• Bullet 350 KS ABS – VCGF46BB

• Bullet X 350 ES ABS – VSYG46*

• Bullet 350 Disc Models – VJKG42*, VKEJ42BB, VBRD42BB

Thunderbird 350 BSIV (Standard + X)

• Thunderbird 350 ABS – VFWJ42*, Thunderbird X 350 ABS – VNWL46*

• Thunderbird X 350 Disc – 1800379, 1800321

Bullet Trials 350

• Part no. 1800399

⚠️ Note: This part is not compatible with BS6 (J-series) Royal Enfields or 650cc models.

Package Includes

• 1 x Royal Enfield Digital TCI Unit (Twin Spark)

• OE Packaging with part number 570798/A

FAQ Section

Q1. Is this compatible with BS6 Royal Enfield motorcycles?
No. This is only for BS4 UCE models. It will not fit J-series (BS6) or 650cc variants.

Q2. How do I know if this is the correct TCI for my bike?
Match your VIN/model to the verified list above. When in doubt, consult your mechanic or check your original TCI part number.

Q3. What does this TCI Unit do?
The TCI (Transistor Controlled Ignition) regulates ignition timing and spark control in Twin Spark systems for smooth and efficient engine firing.

Q4. Is it a plug-and-play replacement?
Yes, it uses factory-matched connectors. No wiring or programming needed.

Q5. What are the symptoms of a faulty TCI unit?
Irregular spark, cold start issues, misfiring, and poor throttle response are common indicators.

Check Part Number Before Purchase