I have full BMW riding gear, from head to toe. I used to have a BMW, and have never really worn the pants or boots, especially in the summer. I just find it too hot, the riding clothes stick to me.
BMW offers a wide selection of riding apparel. Some of it is quite good stuff. Some of it is worthless crap suited only for bar to bar riders and poseurs. Not knowing what specific gear you have, it's difficult to offer constructive suggestions beyond some basic observations.
Stop riding your motorcycle. Yes, stop. You don't display an appropriate understanding of the risks involved. This likely sounds quite harsh. It won't when you're in a hospital bed looking at skin grafts and permanent disability to your body. Hindsight is 20/20, but it won't help then.
Now, if you're going to promptly ignore the above sound advice, go find gear that is more comfortable for you, AND WEAR IT. No gear will be 100% comfortable 100% of the time. We all get a little warm sitting in the sun, not moving, when wearing full gear. It's a small price to pay for the benefits when things go wrong. Do not whine about being hot if you wear jeans. Fools wear street clothes on a motorcycle. Cotton absorbs moisture, (pay attention, this means underwear too), and adds to your discomfort. Wearing wicking synthetic underwear and textile riding pants that fit, which means the legs aren't skin tight, allows moisture to wick away from your skin.
Take a look at Joe Rocket Alter Ego pants. They are water resistant with a water proof zip in liner and have a venting panel that unzips all the way around from just about the knee, around the waist to the other knee. They are very water resistant in that over the last 50k miles or so I've only zipped in the liner a few times when I knew I was going to be riding in rain all day.
Motoport Kevlar gear is another offering. Better quality than the JR stuff, but more expensive too. Also with a zip in liner for total waterproof-ness, which may or may not be an issue with you.
There are a slew of other excellent products out there from Aerostich to Olympia and beyond. Take the time to find what meets your needs and you will be more comfortable and far better protected than by the gear you're not wearing now.
Leather - Yeah, it looks cool, but it's for racing. The very first thing racers do when they come off the track is peal off their leathers because they are HOT. Perforated leathers are a poor compromise, IMHO. I know some folks love them. If you have room in the closet for multiple jackets and pants, go for it. Otherwise leave it for the racer boys/girls.