Popular Post prowlnS10 Posted June 28, 2021 Popular Post Share Posted June 28, 2021 (edited) If you are a taller or even a mid-sized rider the oem T7 set up provides frustrating amounts of buffeting & noise. Many of the early T7 aftermarket windscreen offerings (Puig, Ermax, T7 Rally, Powerbronze) mostly emulated the oem shape & width, that while increasing the height of wind deflection, did little to address the other issues that are inherent in the T7 forward & upright windscreen/faring design. Skydmarx, Givi, V-Stream & more recently Madstad designed wider/reshaped windscreens in multiple heights. Here's my journey over the past 2 years in search of improved wind management for road riding combined with adjustability for off-road & hot weather riding. As I have aged my sensitivity to noise & related fatigue have increased, so have modified most of my bikes over the past 15 years in search of quieter riding envelopes. My design goal was to have a dual height windscreen that I looked over, not through at both the low & high settings while seated that improved rider air management/noise & did not add adverse handling characteristics. I'm 187 cm (6'1") with a long upper body & 83.8 cm (33") inseam, have standard oem seat (upgraded to customized taller oem seat & then a Seat Concepts Sport Touring seat), wear a Nexx X.WED2 full face helmet & ride mostly 70/30 road/off-road. Link to my Blog for my Canadian 2021 Tenere 700 that chronicals in more detail my T7 air management journey, hopefully it might be helpful & at the minimum be a resource with it's many product links. : Cut Down 450 mm x 4 mm Skydmarx Windscreen - 4 mm Spoiler Blade & MRA X-Creen Adjustable Mounts - T7 Rally Windscreen Adjuster - Custom Design Laminar Flow Plate/Bikini Faring - Powerbronze Wind Deflectors - Custom Design Windscreen Side Deflectors - Cut Down OEM Windscreen - MadStad Adjustable Windscreen System - OEM vs Skydmarx vs Powerbronze vs Givi Wind Deflectors T7 Air Management Basics Just adding adjustable windscreen brackets (several are now available) may work ok in the low position & if your head height is within the still air zone, but create air mismanagement issues when in the higher positions by allowing too much uncontrolled air under the windscreen bisected by the instrumentation panel. Improving laminar flow by adding a plate behind the windscreen/in front of the dash panel directing air up the inside of the windscreen is a long accepted practice to equalize/minimize the air speed/pressure differences on both surfaces of the windscreen so that a less turbulent air flow comes off the top edge of the windscreen. High pressure air on the outside surface will curl inwards over the top edge if the inside surface is low pressure, creating eddies resulting in increased buffeting/noise...the greater the difference in pressure the larger/stronger the eddies & buffeting/noise. Improved laminar flow can extend the height of the still air allowing for use of a shorter windscreen providing better sightlines, however, it is possible to have good laminar flow, but if the windscreen is of insufficient height, shape, width & position the air flow can still hit you in an undesirable location such as your head. MadStad is the only manufacturer, so far, to incorporate a laminar flow plate into their adjustable mounting hardware with their Adjustable Windscreen System for the T7. I have not personally experienced the MadStad setup, but based on other's positive comments this should make a comprehensive & effective start for anyone seeking improved wind, noise, buffeting management combining most of the elements desired for the T7: wider, taller & better shaped windscreen, adjustable height & angle + integrated laminar flow plate that adds rigidity to the oem windscreen mount...although the 'function over form' aesthetics may not appeal to everyone. Another air management issue applies to spill over air around the sides of the windscreen (including the void to allow room for hand guards when the bars are lock to lock), tank & body work, of which the T7 benefits from better shaped/wider windscreens & side wind deflectors that deflect the air flow wider than the oem windscreen/deflectors & preferably beyond the rider instead of collapsing in front of, or on the rider. If too much air pressure differential occurs it can create enough of a negative pressure area in front of the rider that the air collapses in on the rider pushing you forward & drawing air up the forks & directing it under the front of your helmet which can add to noise. Handguards & mirrors (anything in the airflow) also factor into the equation. For some, the less costly & efficient use of time K.I.S.S. approach of cutting down their oem windscreen is enough...of which I did that & if all I rode was off-road within a few minutes of my home, problem mitigated (mostly), but I need improvements for extended on-road riding as well. I opted for a Skydmarx 450 mm x 4 mm thick windscreen that helps reduce flex, vibration & resonance (most aftermarket screen are 3 mm) because of its shape & width that widen the rider air envelope vs the oem (Ian @ Skydmarx custom made it for me in late 2020 after test riding several different height/shaped cardboard mock-ups & now offer it as their XL size), then cut it down by 145 mm (5.7") & mounted the cut off portion via bolt-on MRA X-Creen Touring Adjustable hardware as an adjustable height/angle spoiler blade that matches the shape/thickness of the remainder of the windscreen vs a generic aftermarket one & added a laminar flow plate of my design mounted to the oem windscreen bracket. Although not a wind management component, note that the Camel ABH Support Brackets dramatically stiffen/strengthen/stabilize the entire windscreen/dash /headlight assembly, so contributes ancillary benefits, particularly when adding taller/heavier components. This is the combo for me with the oem standard height seat (now the Seat Concepts Sport Touring Standard height seat) that provides much improved wind management for hwy riding with the spoiler raised + improved sightlines when lowered for off-road (approximately the same height as the oem windscreen) & increased air flow for hot weather riding. It allows riding with my visor up, the helmet peak no longer catches the wind blast when looking sideways, ear plugs are optional & curiously, now is less susceptible to crosswinds than the oem set up. Adjustable height windscreen brackets provide further flexibility for taller riders or if a taller seat is used. Prioritization in Terms of Effectiveness If I were to prioritize each component in terms of effectiveness/impact for the T7, I would rank them as follows, with the notation that 2 & 3 are almost interchangeable depending on individual circumstances because they both can improve air flow dynamics, while 4 as a stand alone does little to improve those dynamics & just raises or lowers the windscreen sometimes creating a benefit, sometimes a detriment...it is really a combination of some or all of them that provides the most effective solutions as there is a certain amount of interrelated co-dependence: A properly shaped/sized windscreen #1 & side deflectors #1A. They form the basis of your wind management - much like a well designed chassis sets the foundation of your handling - with the caveat that the T7's Rally inspired design with forward located & upright angle, narrow windscreen compromise aerodynamics & limit overall effectiveness. A laminar flow plate optimally positioned behind the windscreen improves air flow up the inside surface of the windscreen reducing the air pressure differential relative to the outside surface. The effectiveness of a laminar flow plate is increased if the opening, usually in the lower 1/3 or bottom of the windscreen, is an optimal size & shape and/or the windscreen is raised/moved forward a little relative to it to allow sufficient air flow up the inside of the screen...but too much airflow on the inside of the windscreen can upset the optimal/effective pressure balance range & have negative impacts...so lots of dynamics in play & every motorcycle & different combinations of windscreens/deflectors/spoilers/etc will require slightly different tweaking for optimal effectiveness. An adjustable spoiler clamped or bolted to the top of the windscreen offers tuneability & depending on the type of hardware, height adjustability, & acts like a 2nd laminar flow plate by allowing air up the inside of its surface becoming an effective tuning device for most windscreens, including just an oem windscreen. Height adjustable windscreen brackets - best when combined with a laminar flow plate, otherwise they can introduce air flow issues if raised too high. Some will permit lowering the windscreen lower than the oem fixed position & may differ in adjustment range, so best to confirm if important. Note that much of the oem T7 integrated windscreen, instrumentation, headlight & accessory bar mounting assembly is resin & rubber nuts & may not be designed for the additional stress/loading of added components & height adjustment without an additional brace/support like the Camel ABH Support Brackets mentioned above. If you want a visual of the air dynamics behind your windscreen tape several lengths of string to the edges of it & go for a ride at city & hwy speeds...the better the air management the straighter & more still the strings will be. Every change made has both positive & negative potential, there is no perfect solution or one size fits all because riders come in all sizes, preferences, type of riding, bike set up, needs, helmets & sensitivity/tolerances to noise, while motorcycles have differing rider triangles, rider to windscreen distances, windscreen angle, shape, size, body work interfaces & preferred aesthetics...add in Adventure motorcycle's duality of function which demand more of it's set up...it is therefore complicated with interrelated/co-dependent dynamics...understanding the dynamics/science will get you heading the right direction, trial & error will help you find what works best for you. May the 'wind' force be with you Updated Ride Review Aug 2022 after 10 day 3,800 km Trip My preferred warm/hot weather, no rain set-up is with the spoiler in the low position & the windscreen set to the lowest travel of the T7 Rally adjusters, which provides the best site lines & clearance + some wind to cool my face or push the air flow over my head if I slouch slightly...for rain, colder riding & maximum coverage I prefer the spoiler in the high position. Edited August 30, 2022 by prowlnS10 6 4 Link to comment Share on other sites More sharing options...
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!Register a new account
Already have an account? Sign in here.Sign In Now