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I have one listed on here. Make an offer.

I installed the leg fairings on my bike over the weekend. Huge Improvement. They keep the air from coming up under the fairing, which causes helmet buffeting at Highway speeds. I have the Clock Werks windshield, which isn't very tall but it has a nice lip on the top that helps move the air up...

Pics

Here are some pictures of what it looks like when you remove the side covers and get into the airbox area. I thought some of you would like to see what it looks like in there.

I could make vent panels with more louvers..... :)

When you remove the plates, it gives you access to the 2 bolts that secure the upper engine cases to the engine block on each side. So I believe this was the intended design. I'm just taking advantage of the addition benefits of the openings.

I just did the math...158 NM works out to 116.5 foot-pounds.

The dyno is a tool. When used correctly, it can be very helpful. We used this session to see if there are any gains to be had. That's all. No tuning, just testing and measuring the results. And the before and after results were good. I wish the tuner from BT Tuning had the ability to data log...

Here's the video of us testing the louvered performance plates.

Hi guys. Yes we did have three fans blowing on the bike during the dyno test. I'll include some images so you can see. We estimate the airspeed to be around 45 to 50 mph to simulate the bike moving down the road. I've also included some images of the 3D printed prototypes we experimented with.

The horsepower game was about two HP but the torque gain was six foot pounds. It's not a lot but it proves that the hot air in the airbox area needs to be vented so that the engine can gulp cooler air. I think with mods such as a catless exhaust, they'll be even more to gain due to more cooler...

I'm very familiar with Frogzskin. We have been using it in the snowmobile world for over 20 years. All the air intakes on snowmobiles use Frogzskin from the factory. But it does restrict the flow a little bit. It would be easy to incorporate it into the performance plates but it definitely will...

Here's the results of my dyno session yesterday. I went to Vintage Performance in Sandown NH. https://vintageperformanceproducts.com/ Vinni is an engineer by trade. He's an expert on vintage 2 strokes. We had very good results. The airbox area in the engine does get very hot. Vinni inserted a...

I could use FrogSkin but it will add to the cost. Bug and mice can easily crawl in the front vent openings also as well as other areas. I've found mice in the strangest places in motorcycles and snowmobiles over the years....

Do you have pics of what was in there? Thanks

Yes, engineered to pull air from the front. where the high pressure air from moving down the road helps airflow into this area.

Great points and I agree, this is a low rpm engine designed for torque, not HP. Harleys have notoriously restrictive cylinder heads. The 117 is much better than in the past. But cams and better heads move the power into the upper RPM ranges. So you do give some here to gain elsewhere. The R18...

Sorry, I just reread your post. :(

All great ideas! Petrus is on to a great idea. There's more than 1 way to get more air into this very restrictive air intake design. You can tell by the way BMW designed the intake snorkels that they were trying to scavenge cooler air from the front of the engine's air vents to the air box. The...

I hear you. The R18 airbox design is very limited by the space available. BMW wanted to keep the bike retro looking and appearance came at the cost of HP. The stock factory snorkel system moves the air inlet as close to the front of the bike's 6 front louvered opening in order to grab cooler...