WEM
VIP MEMBER
- Joined
- Dec 8, 2017
- Messages
- 192
I am in the process of removing the rockers and valves from the RH10 head on my 1974 MK II Commando prior to having the exhaust port threads repaired and I have a couple of questions:
1. There were no valve spring heat insulating washers under the inlet valve springs. They were in place under the exhaust valve springs. The Parts List book I have says that the heat insulating washers are not fitted under the inlet valves on the RH1 head. My head is an RH10 head. The A/N parts diagram for my bike shows them under both the inlet and exhaust valve springs. My question is should there be heat insulating washers under the inlet valve springs?
2. I thought I was being careful when removing the rocker thrust washers and the rocker spring washers. I recovered one of each from each rocker assembly. However, when I was cleaning up after finishing I found one extra thrust washer on the workbench. My best guess is that it might have fallen out of the head while I was moving the head around to use the valve compressor. My question regards whether it is usual to have an uneven number of thrust washers. I would have thought that if extra washers were required they would be in pairs. Just as context, the tappet contact points on the end of each valve stem are pretty much centered on the stem.
1. There were no valve spring heat insulating washers under the inlet valve springs. They were in place under the exhaust valve springs. The Parts List book I have says that the heat insulating washers are not fitted under the inlet valves on the RH1 head. My head is an RH10 head. The A/N parts diagram for my bike shows them under both the inlet and exhaust valve springs. My question is should there be heat insulating washers under the inlet valve springs?
2. I thought I was being careful when removing the rocker thrust washers and the rocker spring washers. I recovered one of each from each rocker assembly. However, when I was cleaning up after finishing I found one extra thrust washer on the workbench. My best guess is that it might have fallen out of the head while I was moving the head around to use the valve compressor. My question regards whether it is usual to have an uneven number of thrust washers. I would have thought that if extra washers were required they would be in pairs. Just as context, the tappet contact points on the end of each valve stem are pretty much centered on the stem.
