Hero Genuine Start Magnet Switch Assembly / Starter Relay for Super Splendor, Glamour, Hunk, Karizma, Achiever, X-Treme & Impulse – 35850KR3870S

Hero Genuine Start Magnet Switch Assembly / Starter Relay – 35850KR3870S

The Hero Genuine 35850KR3870S is listed by Hero as SW. ASSY. START MAG, which seller references also describe as a starter relay. In buyer-language terms, this is the starter relay / self-start relay / start magnet switch assembly used in the electric starting circuit. Hero’s official product page confirms the SKU and product identity, while public seller references explicitly add the starter relay terminology that buyers commonly search.

This is not a handlebar starter button. It is an electrical starting component that helps complete the starting circuit during self-start operation. For merchandising and SEO, the strongest model cluster publicly tied to this SKU includes Super Splendor, Glamour, Glamour FI, Hunk, Karizma, Karizma ZMR, Achiever, X-Treme, and Impulse, with dated carryover references across multiple years. Public fitment sources provide the broadest supported model spread.

For buyer search coverage, this page targets both OEM and common-market terms such as starter relay, self start relay, start magnet switch, start relay, and magnet switch assembly. Because electrical relay parts can vary by connector, mounting tab, and generation, buyers should still verify 35850KR3870S by exact part number and old-part match before ordering, especially on older Achiever, Karizma, or Glamour-family bikes.

Key Features

• Genuine Hero OEM part with part number 35850KR3870S.
• Product identity: SW. ASSY. START MAG.
• Common buyer-language name: starter relay.
• Strong public fitment across Super Splendor, Glamour, Glamour FI, Hunk, Karizma, Karizma ZMR, Achiever, X-Treme, and Impulse.
• Sold as 1 piece.
• Useful replacement when the bike has starter relay issues, inconsistent self-start response, or starting-circuit faults.
• Best ordered by exact part number match for older Hero model generations.
• Buyer-friendly search terms included for strong discoverability.

Compatibility Table

Fitment caution: 

Variants

• No LH/RH variant found.
• Sold as 1 start magnet switch / starter relay unit.
• No color variant relevant to this product type.

What’s in the Box

• 1 x Hero Genuine Start Magnet Switch Assembly / Starter Relay

Installation / Fitment Notes

• Match 35850KR3870S with the old relay before ordering.
• Best for bikes facing starter relay / self-start circuit issues.
• Check connector style, mounting bracket, and wiring layout before purchase on older Hero bikes.
• Local mechanic fitting is usually straightforward, but electrical diagnosis is recommended if the starting issue may involve the battery, starter motor, or wiring harness.

FAQs

Q1. Is 35850KR3870S a genuine Hero part?
Yes, this is a genuine Hero SW. ASSY. START MAG.

Q2. What is this part called in normal market language?
It is commonly referred to as a starter relay, self start relay, or start magnet switch.

Q3. Does it fit Super Splendor and Glamour?
Yes, public fitment history clearly includes Super Splendor and Glamour for this SKU.

Q4. Is it also used in Hunk and Karizma?
Yes, both Hunk and Karizma / Karizma ZMR appear in public fitment references for 35850KR3870S.

Q5. Does it fit Achiever and X-Treme too?
Yes, public fitment history also includes Achiever and X-Treme.

Q6. Is this the same as a handlebar starter button?
No. This SKU is a start magnet switch / starter relay, not the handlebar switch button assembly.