lkraus
New member
I was checking out potential recalls on a Wethead at the NHTSA site and came across an interesting "Manufacturer Communication" from 2019, https://static.nhtsa.gov/odi/tsbs/2019/MC-10165251-9999.pdf
In part:
Complaint
Ticking noises from the cylinder head
Cause
Due to quality differences in the adhesion of the DLC (Diamond like coating) of the
rocker arm, the rocker arm and camshafts can wear prematurely.
This presents itself initially as ticking noises from the cylinder head.
Measure
All the K46/13 (S1000RR'c) manufactured since 1/16/2018 are being fitted with a new
version rocker arms. The other models, including the K8x (F850/750GS), will still be
temporarily manufactured with the previous version rocker arms and converted gradually.
The coating of the new lever has additional layers, which have a damping effect and
increase the robustness of the layers. Visually the new rocker arms differ considerably
from the old ones, see attached image.
If the only complaint of the vehicle is ticking noises and the motor is not damaged
apart from worn rocker arms and camshafts, ALL rocker arms and camshafts will
be replaced and an oil and oil filter change carried out.
ATTENTION. Always check both cylinders in the K5x (R1200's) and ALWAYS replace
all 8 rocker arms, even if all rocker arms do not show traces of wear!
So, maybe the problem has not been improper hardening of the camshaft, but faulty rocker arms?
In part:
Complaint
Ticking noises from the cylinder head
Cause
Due to quality differences in the adhesion of the DLC (Diamond like coating) of the
rocker arm, the rocker arm and camshafts can wear prematurely.
This presents itself initially as ticking noises from the cylinder head.
Measure
All the K46/13 (S1000RR'c) manufactured since 1/16/2018 are being fitted with a new
version rocker arms. The other models, including the K8x (F850/750GS), will still be
temporarily manufactured with the previous version rocker arms and converted gradually.
The coating of the new lever has additional layers, which have a damping effect and
increase the robustness of the layers. Visually the new rocker arms differ considerably
from the old ones, see attached image.
If the only complaint of the vehicle is ticking noises and the motor is not damaged
apart from worn rocker arms and camshafts, ALL rocker arms and camshafts will
be replaced and an oil and oil filter change carried out.
ATTENTION. Always check both cylinders in the K5x (R1200's) and ALWAYS replace
all 8 rocker arms, even if all rocker arms do not show traces of wear!
So, maybe the problem has not been improper hardening of the camshaft, but faulty rocker arms?