The 2021 Kawasaki Ninja H2 SX has 3 recalls, the most serious being an under-greased rear hub bearing that can fail and lock up the rear wheel without warning, raising the risk of a crash.
Two engine-related recalls round out the list. The first covers a condition where the engine can stall while riding; the filing does not describe a specific mechanical trigger for this model year, but a sudden stall at speed removes power and engine braking, which can make the motorcycle difficult to control. The second engine recall involves the oil pressure relief valve, which can come apart internally and cause an immediate loss of oil pressure. When that happens, the engine may also stall, and prolonged oil pressure loss can cause deeper internal engine damage on top of the control risk a stall creates.
At a glance
What can fail
The plunger in the camshaft chain tensioner can lock up, causing the engine to stall while you're riding.
What the fix does
Dealers will replace the camshaft chain tensioner at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The rear hub needle-bearing may not have enough grease, causing it to fail and the rear wheel to lock up.
What the fix does
Dealers will replace the needle-bearing at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The engine oil pressure relief valve may separate, causing oil pressure to drop and the engine to stall.
What the fix does
Dealers will replace the oil pressure relief valve at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
