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Trying to get this K running right! Tue Dec 10, 2013 9:09 pm
Jez
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Silver member
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I'm chasing an engine running problem. on my 84 K100RS (2V)
Symptoms are:
Will idle nicely when first started (about 1100rpm from memory) but soon the idle drops to 950 (where I think it's meant to stay?) then she quits. It can be nursed along and kept running and it improves when it warms up, but I often have to keep it running with extra gas.
Occasionally the throttle off / idle speed will climb to about 2000, it doesn't stay that way, it's not frequent, but definitely not uncommon.
Had a slight back fire for the first time the other day after reassembling post temp sensor check. This was with a handful of frustrated throttle though.
What has been done;
Crank Case breather hose replaced.
Checked Coils, seem OK
Water Temp sensor checks out.
Replaced Vacuum hose for FPR
Removed vacuum switch (2V models only)
replaced Fuel Pump
Fuel pressure seems OK.
Next?
So I wanna do the easy stuff first, like check that the throttle body rubbers aren't sucking air. ( is this done with LPG/propane released around the TBs whilst running?)
Next I guess test the air flow sensor (that gives me the willies, is it really as difficult as I imagine?)
I was gonna balance Throttles but I found out that valve clearances, timing and air leaks must all be addressed first, so those'll be next.
Anyone have a silver bullet I can fire into this thing?
I'll post some pics later as I know you all like to watch. I'm at work at the moment. It's looking a little different with an old new fairing kind of like a Frankenbeemer!
Jez
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84 K100 RS
Chassis number 0080546