Engine Cover For Triumph Street Twin Speed Twin - 2016+

Engine Cover for Triumph Street Twin and Speed Twin (2016 to present)

The Triumph Street Twin and Speed Twin expose their parallel twin engine as a visual focal point of the bike's design. The engine cases, clutch cover, and alternator cover are visible and unprotected in the stock configuration. On bikes used in urban commuting, a low-speed fall or parking contact puts these aluminum casings in direct contact with asphalt or a curb — resulting in scuffs, gouges, or cracks that compromise the visual character of the engine and, in the case of the clutch cover, risk oil contamination. This engine cover is a protective overlay that mounts over the factory engine side covers, shielding the aluminum from direct impact and wear.

The cover is manufactured from ABS plastic with a matte or textured black finish. It attaches using the factory engine cover bolt positions on the Street Twin and Speed Twin, with no modifications to the engine casings themselves. The cover's profile follows the factory cover contour closely, maintaining the bike's clean side profile. Installation is straightforward — remove the stock cover bolts, position the protective overlay, and replace the bolts through the cover's bolt holes. Access to the clutch inspection plug is maintained through a port in the overlay design.

At $69.90, this engine cover is practical protection for Street Twin and Speed Twin owners who use their bikes in city traffic. Urban motorcycles are significantly more likely to sustain low-speed falls than bikes ridden exclusively on open roads. The cover prevents the cosmetic and functional damage that makes a light fall more expensive than it needs to be. It also provides a subtle visual update to the engine side, giving the exposed engine bay a more modern protected appearance.

Confirmed fitment for the Triumph Street Twin (865cc and 900cc, 2016 onwards) and the Speed Twin (1200cc, 2019 onwards). Both models use compatible engine cover bolt positions and casing geometry. Also fits the Bonneville Bobber and T120 where the engine covers share the same mounting pattern.

Frequently Asked Questions

Does it affect engine heat dissipation?

The engine side covers are cast aluminum and contribute some surface area to engine cooling by convection. The overlay adds a thin ABS layer over this surface, which has minimal effect on total heat dissipation. The Street Twin and Speed Twin engines are designed with thermal margins that account for more significant obstruction than a thin cover overlay. No overheating concerns have been reported with similar covers on these platforms.

Does it work on the Street Scrambler?

The Street Scrambler shares the Street Twin's 900cc engine block and uses the same clutch cover and alternator cover bolt pattern. The overlay fits the Street Scrambler using the same installation procedure as the Street Twin. Not confirmed for the Thruxton or Thruxton R, which use a different engine case aesthetic with a more rounded clutch cover profile.

Free shipping on every order in the US. Every part is covered by a 1-year warranty and can be returned within 30 days of receipt.