Spark plug covers fading

Thread starter Engineer
Start date Apr 18, 2019

knutk

Registered user

Apr 20, 2019

Engineer said:
There are many ways of getting it back to black - the question is why does it only happen on the newer bikes, my 2005, 2010 and 2013 bikes never had this happen, my 2018 bike is 1 only year old and just coming up to 10,000 miles - something has changed, what is it?

A while back BMW had to change the type of plastic to a type that is more recycle friendly. This new plastic type is more vulnerable to strong solvents when washing the bike.