1 Workshop & Breakfast to get an old girl running - Needs help Mon Jun 15, 2020 6:33 pm
Matthew-Brisbane
Life time member
Posted for another rider
Vic the green cafe racer
My bike is a 1985 K100 RS that I bought from a fellow in Maryborough.
It has done about 50,000 kilometres, started and ran nicely, and was a project bike for my daughter who was moving to her second bike with her open license.
I stripped everything off the bike and was left with the engine sitting on two besser blocks. The air box and throttle bodies were not removed.
All tappet clearances were good except for one exhaust shim clearance which was under spec. The water pump seal was replaced. Injectors cleaned and bench tested the backyard way. I had prob-lems with the first restart because I fitted the fuel lines the wrong way. I thought the pressure line went straight to the fuel pressure regulator. When I switched those around she started up and ran perfectly. I rode the bike around the back streets with no issues except for an intermittent short circuit in the right hand indicator circuit.
After swinging the tank 90 degrees to check wiring and sorting the indicators, I found the bike hard to start.
Symptoms:
Would start but there was no response when the throttle was opened and engine would eventually stop. Sub sequent attempts to start resulted in occasional backfires. Removed plugs and they were wet. I got a few short runs when I disconnected the tank and sprayed some Start U Bastard in the air box. I’m not sure if I have good spark because I might not have used the correct procedure to check the plugs.
I have a spare ECU, injector unit and hall sensor and will fit a new battery to the bike for the work-shop.
Vic the green cafe racer
My bike is a 1985 K100 RS that I bought from a fellow in Maryborough.
It has done about 50,000 kilometres, started and ran nicely, and was a project bike for my daughter who was moving to her second bike with her open license.
I stripped everything off the bike and was left with the engine sitting on two besser blocks. The air box and throttle bodies were not removed.
All tappet clearances were good except for one exhaust shim clearance which was under spec. The water pump seal was replaced. Injectors cleaned and bench tested the backyard way. I had prob-lems with the first restart because I fitted the fuel lines the wrong way. I thought the pressure line went straight to the fuel pressure regulator. When I switched those around she started up and ran perfectly. I rode the bike around the back streets with no issues except for an intermittent short circuit in the right hand indicator circuit.
After swinging the tank 90 degrees to check wiring and sorting the indicators, I found the bike hard to start.
Symptoms:
Would start but there was no response when the throttle was opened and engine would eventually stop. Sub sequent attempts to start resulted in occasional backfires. Removed plugs and they were wet. I got a few short runs when I disconnected the tank and sprayed some Start U Bastard in the air box. I’m not sure if I have good spark because I might not have used the correct procedure to check the plugs.
I have a spare ECU, injector unit and hall sensor and will fit a new battery to the bike for the work-shop.
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1986 K100 RS Motorsport
1988 K100 RS SE
1990 K1 known as Barn Find
2004 F650 GS known as DACK-DACK
#### K100 RS Project