This issue are seen on the 7th Generation CL7 CL9 & CN1's. You will see abnormal outer wear and feel an adverse uneven wear. To check for the symptoms get both rear tyres up and rotate the tyres with your palms across the tread to feel the uneven wear.If you also notice excessive outer edge wear then you may have to replace the upper control arms on the sub frame with a modified part. Honda has made design changes to improve accuracy of the upper arm on the subframe and have made a modified arm. The modified part number is 52390-SEC-305.You can get two aftermarket options one lower control arms, a set of 4 arm which give a lot room for adjustment. The top camber arms do the same job of getting camber within spec as per Honda's spec. TIP If you plan to use aftermarket suspension then use the lower control arms & for stock suspension use the top camber arms. For those who desired a slammed look with a camber look a combination of both will give you loads of adjustment to get your ride handling as you desire and most importantly the looks and tyre camber for your needs. Lower control arm look like The top camber arm look like When you get any of these three options fitted your saloon will require a full four wheel alignment ideally on hunter machine. The factory alignment specs for all 7th Generation saloon are Front toe-in: 0±2 mm (0±0.08 in.) Rear toe-in: 2±2 mm (0.08±0.08 in.) Turning angle: Inward: 38 ° 50 ′±2 ° Outward: 31 ° 40 ′ (reference) Examples of 4wheel alignment on a tourer the rear camber on my tourer was fixed after replacing weak dampers.