Lower Throttle Body boots. - BMW Luxury Touring Community
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post #1 of 5 Old May 21st, 2011, 5:18 pm Thread Starter
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Lower Throttle Body boots.

Just had my bike apart to replace the throttle cables. I notice the lower boots on the throttle bodies were wet looking. After I get it back together and running, I notice a sucking sound from the TB. I took the left side panel back off and can see some air moving the wet oil on one of the TB. The bike runs great no backfire, no surging, it does seem to idle a little higher. I don’t want to tear back into it right now and was wondering if this will hurt anything, again after a couple hundred miles it seems like it running better than ever.
Thanks Mickey
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post #2 of 5 Old May 21st, 2011, 9:25 pm
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Re: Lower Throttle Body boots.

I wouldn't worry about it too much, the worst that could happen is one of your cylinders could run real lean, get too hot, and burn up the piston and the valves, you would still have 3 good ones left

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post #3 of 5 Old May 23rd, 2011, 12:09 pm Thread Starter
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Re: Lower Throttle Body boots.

You know thats what I thought. Why Harleys only have two cylinders why should I need four. Think I'll just say what the f it and leave it alone.

Thank for all the help!
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post #4 of 5 Old May 23rd, 2011, 5:58 pm
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Re: Lower Throttle Body boots.

You probably have a vacuum leak and it will cause your high idle. Will also cause all kinds of bad things not the least of which is poor performance, poor mileage, etc. Here is a thread I started when I had a bad throttle body boot. There's a post with a bunch of photos showing the problem. I suggest going back in and replace the boots.


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post #5 of 5 Old May 24th, 2011, 9:49 am Thread Starter
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Re: Lower Throttle Body boots.

Thanks, that's what I will do. I appreciate the response.

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