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Howling Moto

Bel-Ray Big Twin Transmission Oil 85W-140 | 4, 5 & 6 Speed V-Twin

Bel-Ray Big Twin Transmission Oil 85W-140 | 4, 5 & 6 Speed V-Twin

$17.99 USD
$17.99 USD $17.99 USD
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Shipping is calculated at checkout by size and destination. Most in-stock gear ships within a few business days; large freight items (campers, racks, bumpers) are made to order. Wrong fitment? Send it back within 30 days — we'll help you find the part that does fit.

Fitment & build help

Not sure if this fits your platform? Tell us your year, make, model, and trim — we'll confirm before you order. For bigger builds, we'll help you plan the full stack.

Warranty

Every product on this site ships through authorized channels with full manufacturer warranty. If something breaks in normal use, we'll help you get it resolved.

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Bel-Ray Big Twin Transmission Oil 85W-140

Keep your V-Twin shifting smooth and your gears protected. Bel-Ray's 85W-140 Big Twin Transmission Oil is purpose-formulated for heavily loaded transmissions and final drives, delivering extreme pressure protection and noticeably smoother gear changes. The distinctive red color makes leak detection easy — so you catch problems before they become expensive ones.

Features

  • Formulated for gears in heavily loaded transmissions and gear boxes
  • Recommended for 4, 5 & 6 speed Big Twin transmissions and final drives
  • Extreme pressure additives to reduce component wear and extend gear life
  • Distinctive red color for easy leak detection
  • Easier to find neutral — reduces and eliminates common V-Twin transmission "clunk"
  • Quiets gear whine and improves overall shifting feel

Fitment

  • Harley-Davidson Big Twin transmissions (4, 5 & 6 speed)
  • Compatible with Big Twin final drives

Brand: Bel-Ray | SKU: 96900-BT1 | Viscosity: 85W-140 | HS Code: 420221

  • Ships from San Diego

    We ship from our San Diego dealer network. Most in-stock gear goes out within a few business days — shipping's calculated at checkout by size and destination.

  • Wrong fitment? We make it right.

    If a part doesn't fit your platform the way it should, send it back. We handle the return and find you the part that does.

  • Authorized dealer support

    Every product moves through proper channels. Full manufacturer warranty, real tech support — no gray-market headaches.