765 Triumph Engine Protectors, Issue

That looks bad for OEM case covers. I have the cheap Chinese knock off's case covers that looks so much better? Have you tried some plastic restorer?

 

Try something like Meguiar’s Ultimate Black Plastic Restorer. I've had good results using this product, however there may be better plastic conditioners, restorers.

 

Hey sir, I register for this platform just for this. I got exactly the same problem with my engine protector. I got the same fading in color on the left side and it was okay on the right side, and coincidentally, although I live in Florida and my bike is in the states, I bought my engine cover from a website in the UK. I suspect that these's might be a group of engine cover that had painting issue with the left side.