The unit is labeled 1/26/93 This T-122 model should have been factory installed on a 1967 BMW R27. The existing condition is worn, dirty and leaking. No intake rubber to air box and filter. It runs the engine at idle well. The throttle linkage cable was tight.
Throttle and Front Brake Handlebar Control:
Continue restoring throttle assembly and install new parts. Touch up chips, semi-gloss black. Sand and polish new top cover. Install. Bore entry dimple. Remove brass end caps from old cable. Install rubber boots. Cut new cable to fit, solder end and install brass cap. Assemble carburetor slide and spring.
Original Condition:
The hand grip assembly was greased recently. The
hand grip rubber washed up with soap and water easily. It shows light wear the
hand grip which joins on to steal tines joins into brass parts to a chain and
all show wear. Not smooth operation. The top cover of the throttle assembly has a smash mark on the top surface. This impact with the motorcycle has caused the top
plate to become bent and it rises up to make a space where the cable enters. Shift
gasket in good shape assembled it again like grease and will see most of the
concern had to do with the spring back and the return of the throttle to the
idle position when performing the start up. The other side of the cable is the screw top of the carburetor. The covering is split. 
The top of the carburetor
came apart easily and is in fair condition. The throttle cable needed to
be disconnected from the top of the assembly in order to inspect the spring and
linkage. I cleaned the air/jet slide and around the openings. It had a varnish build
up on the slide that I had to chip it off. It leads to poor movement of the
throttle assembly system. The carburetor was removed.
Float Bowl- 11gram float.
Time for ultrasonic cleaning of ports and passages
Air / fuel mixture screw before
The original cast aluminum polishes up beautifully
Air / fuel mixture screw after
New Gaskets and Jets
