Heres a fix for the rear factory mud flap

Go to your local honda dealer, ask for a 2009 CRF 450x flap and ta daaa.
Cheap and 10 times stronger. Just adjust the holes to suit with a 10mm drill bit to keep the Husky factory screws snug.
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Good idea. I have used a piece of adheasive rubber ( often used under doors etc to reduce drafts) to good effect. It has stayed on for a year and is is good condition. It is about an eigth of an in thick and an inch wide and cut long enough to be wider than the groves in the plastic guard. I have attached it ti the swing arm.

What is the issue with the OEM piece? Is it just a durability thing?

The stock ones have a couple spines moulded into the back of them that cut into the aluminum swingarm after a while. All I did was just trim the spines down with a knife and it more or less solved the problem. Not completely, but the wear has been greatly reduced.

Slowpoke is right though mine had a huge hole in it before it had a chance to wear the swingarm too much. The warp speeds these things are capable of ) must have blown it back onto the rear tire while rding and chewed out a cricket ball size hole (on mine).

Very good tip thanks! I have three Honda dealers near me and the closest Husky dealer is about 2 hrs away.

Good find. Thanks for the idea.

That swing arm is soft metal .... I had the plastic covering for the rear break cylinder almost cut a hole through mine after it got bent over on it and was rubbing ...

Good tip..

Also, when you replace your chain you can cut the chain two links longer and move your wheel back enough to keep it from wearing through also.

Another good tip rexr, thanks.

I took her for 4 hrs of hell today and not one mark from the tire or swingarm was on the flap. Its stiff enough that it doesnt budge

Ran into the same prob. My fix was bending back the cylinder(obvious) and applying one of those fine looking husky swing arm stickers. Covered the marks it made.