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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: steve68 on September 11, 2014, 09:06:15 PM

Title: k75 won't start- air filter?
Post by: steve68 on September 11, 2014, 09:06:15 PM

Hello,

1987 K75S

Just changed the air filter (removing a huge mouse nest) & now the bike won't start.  I did start it after re-assembling everything and let it run for about 30 seconds.  The next day it was a bit cold and it flooded.  Now it won't start at all, despite changing plugs.

Filter appears installed correctly (TOP/OBEN facing rearward).  Engine cranks great, and I have spark on new plugs.  After cranking, plugs come out wet, so fuel appears to be flowing.  I took the air filter out today, checked the air meter cable and re-installed to no effect; maybe I should re-install the mouse nest? :dunno2: :hehehe

Maybe the ECU is bad; I have the same result whether it's connected or disconnected...  any thoughts?

thanks,

-Steve

Title: Re: k75 won't start- air filter?
Post by: TimTyler on September 11, 2014, 11:05:51 PM

Make sure your plugs are gapped properly, and that the spark plug wires are pushed on all the way. I use pliers to grip the tab on the cap and push them in hard until I hear a snap.

Title: Re: k75 won't start- air filter?
Post by: Chaos on September 11, 2014, 11:20:36 PM

with mine, starting it and shutting down is a guaranteed fouled plug or 3.  If you need to start it take it around the block and let it warm up.  If you got spark and fuel hard to guess, check for loose wires and connections.  Did you take the shrink wrap off the new filter?   (that's a joke :yes)

Title: Re: k75 won't start- air filter?
Post by: steve68 on September 13, 2014, 03:10:44 PM

Got it to start last night.  Apparently the ECU needed to be unplugged and plugged in again 48 times instead of 47...

thanks for the advice though!

-Steve

Title: Re: k75 won't start- air filter?
Post by: Chaos on September 13, 2014, 09:40:36 PM

They all do that