Wunderlich fender extender - BMW K1600 Forum : BMW K1600 GT and GTL Forums
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post #1 of 30 Old 04-14-2019, 04:41 PM Thread Starter
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Wunderlich fender extender

Thanks to everyone on this forum for so much helpful information on our K bikes.
I just installed the fender extender with the support bracket and even though the directions were not the best after reading suggestions here it went well.
My question is after install it seems that the extension just clears the lower radiator cowl by about a 1/4” or so. Anyone had an issue with the extender making contact when turning the handle bars while under way?
Appreciate any feedback thanks.
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post #2 of 30 Old 04-14-2019, 05:10 PM
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I haven't bought it yet, but I have the same question. The Wunderlich looks to be better made, but a much closer fit, than cheaper models, somewhat because it comes down lower for more protection. Just want to be sure no one had an issue with rubbing...of the legal, but nonetheless undesired sort.

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post #3 of 30 Old 04-14-2019, 05:19 PM
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I put it on 3 years ago and zero issues. I don't recall installing any support bracket either. Good product and highly recommended; even though it's pricier than the cheapos on EBay, I wouldn't hesitate.
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post #4 of 30 Old 04-14-2019, 05:26 PM
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I wonder since this Bike runs warm in traffic if that Fender extender doesn't Block some airflow.

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post #5 of 30 Old 04-14-2019, 05:44 PM
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Quote:
Originally Posted by flyjets View Post
I wonder since this Bike runs warm in traffic if that Fender extender doesn't Block some airflow.
The electric fan takes care of that issue by pulling air through the rad.
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post #6 of 30 Old 04-14-2019, 06:42 PM
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Recently installed the Wunderlich fender extender on my B along with the bracket. No issues noted. Temp has not been any warmer.

I'd do it again

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post #7 of 30 Old 04-14-2019, 10:50 PM
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Just installed one on my GA. I like the support bracket. Even though you have to remove it everytime you take the fender off.

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post #8 of 30 Old 04-15-2019, 04:43 AM
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Quote:
Originally Posted by flyjets View Post
I wonder since this Bike runs warm in traffic if that Fender extender doesn't Block some airflow.
Fender extender works fine, its what the bike should have had from the design stage.

The problem with airflow is the big, solid, plastic lump down the middle of the radiator. I have had 3 K16's and the only one that did not overheat was the one that I put the Rad Guard on.

My current bike is a 2017 K16 Sport, that overheated last year in France, no other bike in the group overheated. I spray (road grime detergent) and wash the radiator every time I was the bike.
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post #9 of 30 Old 04-15-2019, 08:08 AM
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Prince & David


I ride the K1600 in 95F / 35C in stop and go I hear the fans often at speed they don't seem to engage.


Some of these Fender extenders on the market are ill conceived and block airflow to a already low surface area radiator.
removing a Radiator conveyer to insert a mesh protection panel shouldn't 't give you more airflow. That is the sole purpose of that center conveyer.


I am not saying that the K1600 couldn't benefit from a fender extender just not one so close to the radiator that restricts airflow.

Ian

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post #10 of 30 Old 04-15-2019, 08:21 AM
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The louvered OEM guard on the front of the radiator already blocks air flow. If you look at it, it is louvered in the front and solid at the rear so effectively no air is passing through it.

When the front fork is pointing straight, the fender extender does not block any more air than the louvered guard.

Once the fender extender is installed, the louvered guard can probably be removed which likely would help with the cooling. Or, remove the louvered guard and drill a bunch of holes in the back to allow some air flow. If I ran on a lot of gravel roads I would not remove the louvered guard.



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