Campaign 21V-987

Radiator cap may have been improperly formed during manufacturing, which could create an insufficient seal

Defect summary

Honda (American Honda Motor Co.) is recalling certain 2021 Honda Rebel 1100 (CMX1100) motorcycles. The radiator cap may have been improperly formed during manufacturing, which could create an insufficient seal.

Consequence

An insufficiently sealed radiator cap may leak or spray hot coolant, increasing the risk of injury or crash.

Remedy

Dealers will replace the radiator cap and refill any lost coolant, free of charge. Owner notification letters were mailed February 22, 2022. Owners may contact Honda service at 1-888-234-2138. Honda's number for this recall is KN1.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Source: NHTSA ODI recalls file, campaign 21V987000. Text as published by NHTSA.

Vehicles covered

One product line is covered

Owner complaints filed with NHTSA about engine and cooling on these vehicles: 1, of which 0 involved a crash, fire, injury or death. Complaints are not verified by NHTSA.

Vehicles covered by campaign 21V-987
Make	Model	Model years	Complaints on this component
Honda	Rebel 1100	2021	1

Source: NHTSA ODI recalls and complaints files. Equipment, tire and child-seat campaigns list products, not vehicles.

Investigation

No NHTSA investigation is linked to this recall

Most recalls are started by the manufacturer. This one lists "Manufacturer" as its origin.

Before the recall

No service bulletins on this component preceded the recall

Distinct manufacturer communications on the same component group, make, model and model year in the 24 months before the report date.

Source: NHTSA manufacturer communications file.

Service bulletins

25V-892 Dec 18, 2025
Pistons and piston rings may have been improperly manufactured, which can lead to rod bearing failure, possibly resulting in rear wheel lock up or…
25V-891 Dec 18, 2025
Cylinder head may have been improperly manufactured, which can lead to rod bearing failure, possibly resulting in rear wheel lock up or oil…
25V-358 May 29, 2025
Crankcase sealing bolt may have been improperly manufactured, which can cause the engine to leak oil onto the rear tire
25V-195 Mar 27, 2025
Oil pump driven gear may fail, resulting in a loss of drive power
24V-820 Oct 31, 2024
Primary drive gear bolt on the crankshaft may break, which can result in an engine stall and lock up the rear wheel
23V-751 Nov 13, 2023
Due to a manufacturing error, the connecting rod bearing in the engine may wear and seize, damaging the engine