Well I put one on my 05 lowrider and the biggest improvement was throttle response.It definitely made a difference. Unfortunately would not fit my 2010 but may put one on this winter

 

I didn't advocate dropping three grand on anything and where you got that idea from is beyond me. And as you stated ... in a controlled environment there may/might/ possibly be a an incremental difference ( minuscule as it might be ) when used in conjunction with all the other factors ( trans brake, throttle stops etc ) anyone who would claim to reap "benefits" on the street is ... How do you say it? ... Drinkin' way too much of the Kool-Aid!

 

Here's a review with dyno results from Hot Bike Magazine.

http://www.hotbikeweb.com/boyesen-po...ower-under-140


Boyesen Engineering, intake innovators for both the two-stroke and four-stroke markets since 1972, recently developed the Power X-Wing (MSRP: $129.95) specifically for the V-Twin market. Even though Boyesen has only dabbled "in the V-Twin industry" for a little over a year now, they know what it takes to achieve results.
The X-Wing is meant to optimize performance by straightening airflow in the throttle body/carburetor. It fits CV carbs for Big Twin and Sportster models, Mikuni carbs, and Delphi EFI models for Big Twins and Sportsters. Boyesen's focus: to increase the speed and velocity of air flowing into the intake. Airflow is streamlined through the intake in a more direct manner, which is meant to increase power. Also, they've seen results in fuel efficiency with a 5 to 8-percent increase in fuel mileage. And around here in California, gas prices per gallon have crossed the $4 mark and keep rising.
One thing that stood out when we received the X-Wing was, "How does such a simple-looking contraption produce a power increase?" Determined to find the answer, we called Lifestyle Cycles in Anaheim, California, to put the product to the test on a stock, fuel-injected '04 Dyna Low Rider. We wanted to see what the X-Wing did in a carbureted bike, so we dropped one into the carb of an '01 Dyna as well. We left it up to LifeStyle's dynamometer to have the final say. HB
6. The fuel-injected Dyna's baseline run produced 59.76hp and 67.82 lb-ft of torque. After installing the X-Wing, the power increased to 61.26hp, a difference of 1.5 hp, but the torque went up to 71.90 lb-ft, an increase of 4.08 lb-ft. Also, we took the bike out for a spin before and after the product was installed, and we could definitely feel a difference in throttle response, especially in the low to mid rpm range. The carbureted Dyna gained 1.11hp and 1.41 lb-ft of torque, but the bike was equipped with performance pipes and a Screamin' Eagle air filter. So, even though we noticed a better number on the bone stock fuel-injected Dyna, we still saw an increase for the carbureted Dyna. Quick, easy, and cheap; what else could you ask for?


And here's another one from Motocross mag, where they also tested it on some Harleys:

http://motocrossactionmag.com/produc...g-intake-tract

 

Just curious, have you ever seen a review from these mags where it says "this thing is a piece of junk, dont bother"?

 

The HP is negligible IMO but the increase in torque isn't terrible. Were it not for the slight increase in HP along with the TQ gain I would have offered that simply blocking the intake a little bit with anything would increase velocity and therefor maybe the TQ numbers along with it. Overall, it's not in negative numbers so I don't think anyone got ripped off here.

 

Good old Uncle Larry calls us who have positive results liars doesn't he ?? Master mechanic phhooooo

 

No, but I've seen lots of before and after torque/hp charts where the gains were well up into the RPM range, and the bottom end suffered. As many have reported on this thread, the gain in the X-Wing is "felt" coming right off idle, and the dyno tests done in the articles show the actual results.

 

Phoooooo ... That's kind of childish isn't it? You sure do read a whole lot into things. Yep, Master. Owned my own shop for over 30 years too. I'm on my 67th trip around the sun and paid my dues also. It's obvious that you and I see things from a different perspective :>)

 

Uncle Larry we must see some things from a different perspective, On this subject of the X wing you and others totally discount some folks experience who have actually used this device. Some of us try to give an honest opinion of things we have used. You totally disrespect this. Snake oil you say.

Close minded folks said the same thing about electronic ignitions, MSDs and Unilites in the 70s and 80s. Boy were they wrong and my Pontiac sure showed them tail lights.

I may see you as as some part changing "master mechanic" old fart with your close minded opinions from your self appointed lofty seat, insulting folks because you think you are better because you had a shop and the title of "master". I hope I am wrong.

Childish I may be be but just how do you write the raspberry sound???


Ride safe when the winter goes away. See you on the forums !!

 

Hey unc: I too am a master and an A&P, and also own my own shop, and am also 67. I can't speak to the performance of this X-wing thing, but I will say that, over the years, Boyesen had made some damn good products. It may be snake oil, but until I know for a fact that it is snake oil, I'll save my opinion. Just sayin!