Jill and all,

The Harley brand of engine guard covers DO restrict air flow and Harley tells you not to use them above 55 degrees.

The Desert Dawgs are different. Our patented design actually funnels some of the air through the engine (in fact, you'll sometimes feel the warmer air on the inside of your legs).

There is NO temperature restriction on Desert Dawgs! You can ride with them in as warm of weather as you can stand.
Desert Dawgs are also made of a much nicer material, and the craftsmanship is WAY beyond Harley's ... but you don't have to take my word for it; see what our customers (who've HAD the Harley ones) have to say:

http://www.leadermotorcycle.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=L&Category_Code=CUSTOMER

Tracey Cramer
St. Francis, MN
Tuesday, November 17, 2009
Editor Response
Thanks for responding to this Tracey.
Genevieve Schmitt, Editor
I have used the Deserts Dawgs on my '02 H-D Softail for several years and love them.

Brycie
Whiting, IN
Monday, September 21, 2009
I have been using a similar product (don't remember the brand name) on my Harleys for more than 10 years. They are great in cold and/or rainy weather but they do restrict air flow to the engine so I don't recommend them in hot weather.

Jill
Saint Paul, MN
Monday, September 21, 2009