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Discussion Starter #1
Since getting my K9 I've had intermittant rough running issues on top of my fuelling issues. The fuelling was the dreaded high pressure filter as well as a clogged and collapsed pickup screen, both of which I'm blaming on the bike being left sitting with garbage (ie ethanol) fuel for extended periods before I got it (under 10,000km when I got it not long ago), but the rough idle just didn't fit that cause. After replacing the filters etc (bypass next time) I went hunting and found this:
20190717_090757.jpg
The little rubber tit off the end of the vacuum take-off port has been gnawed on by a little grey bastid (mouse most likely) and is passing air, throwing the whole thing out of balance. I had some spares in my parts box for my BM that fit, but if people are struggling to sort out balance issues, make sure to check these.
 

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Thats great that you showed us this because even the small things like this cause issues and are very hard to spot
unless you know where to look.
 

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Good tip, Dark.

I found mine were cracked when I went to put extension tubes on for easier throttle body sync'ng. I think I found four, if memory is correct, and all were cracked or split on the ends.
 

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Discussion Starter #4
Also, be careful when you remove them. I managed to flick one off into the aether where it's been hiding ever since along with it's clip. Bit of a pain, really. Mine also has hoses on the other two ports which I haven't traced yet as they don't seem to be giving me any grief.
 
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