Motorcycle Exhaust

/Tag: Motorcycle Exhaust

The Harley Brake Investigation

Average riders put more thought into louder pipes than the maintenance of their motorcycle braking system. Loud pipes save lives. We published a post  about this controversy not too long ago. True or not, one thing about loud pipes is certain – the Feds aren’t interested in pipes that aren’t loud enough. The Harley Brake [...]

The Biker Guide: Choosing the Perfect Exhaust

    Every rider loves a good aftermarket exhaust, there is nothing quite as pleasing to the ears as the rumble of a Vance & Hines exhaust system. But why should you get an exhaust? Why is this one of the most popular upgrades for all types of riders? The answer is simple, riders are [...]

When It Comes to Your Bikes Engine, It’s All About the Air

Here’s a basic fact about the internal combustion engine: Every single one of them is just a variation of an air pump. As the piston goes down with the valve open, air — mixed with fuel — rushes into the cylinder. As the piston goes up, it’s compressed, spark occurs, power is made, and the spent gases are sent merrily down the pipe. To make more power, we need to get more air in and out of the motor.

“More air means more power” is the mantra for this blog post and the easiest place to show this is with the motorcycle air cleaner assembly. Mother Harley is handcuffed by … Continue Reading

New California Law “Muffles” Motorcycles

Earlier this week, California Governor (and motorcyclist) Arnold Schwarzenegger signed into law the Motorcycle Anti-Tampering Act (SB 435), originally introduced by state Sen. Fran Pavley (D-Santa Monica).

What does this bill mean to bikers in California? It means that all motorcycles produced after January 2013 will be required to have a visible EPA stamp that ensures the exhaust is clean burning and doesn’t exceed a noise level of 80 decibels. For those bikes not displaying the stamp, fines of  $100 for the first infraction and $250 for subsequent violations will be imposed.

“The noise caused by illegally modified motorcycle exhaust systems is a major quality-of-life issue across the state,” Sen. … Continue Reading

Cobra Steps Up With A Double Whammy

Cobra could be the best thing you’ve never heard of but you probably should have. They have been in the industry for almost 30 years, pioneering exhaust and aftermarket parts for metric cruisers before moving into the Harley market. During this year’s Sturgis rally, Cobra was on hand with its new Tri-Oval Mufflers and Power Flow air intake — and they made a huge splash by winning the new product of the year award in Sturgis.

The Tri-Ovals offer something new stylistically, which is an achievement in itself when it comes to cruiser exhaust systems. And the 4-inch mufflers have a one-of-a-kind sound that sets them apart from your typical … Continue Reading

By |2014-03-31T14:49:01+00:00August 24th, 2010|Categories: Product Information|Tags: , , , , , , , |Comments Off on Cobra Steps Up With A Double Whammy

Will I Need to Rejet When I Change my Pipes?

As moderator of J&P’s online forums as well as technical adviser here at the company, I get the opportunity to exchange posts about a variety of topics and interact with hundreds of people each week. And in both venues, I find one of the most asked questions is, “If I change my pipes, will I need to rejet?” The simple answer is “Yes, you do need to rejet.

And now I’ll explain why. But first, a little motorcycle exhaust education: Exhaust technology is the reason two-stroke engines work. Volumes have been written about the principles governing expelling gases out of the beloved internal combustion engine – space forces me … Continue Reading

By |2014-03-31T10:34:43+00:00July 30th, 2010|Categories: Tech Tips|Tags: , , |17 Comments

Fuel Injection Part I – the Great Mystery

Gone are the days of “jetting” your carb, or throwing on a “G” or an “E” or any other aftermarket carb claiming to be the holy grail of tuning. Today, it’s all about throttle bodies, injectors, ECU’s and fuel pumps. And with these new winds of change come a storm of misinformation and confusion about FI controllers and which ones do what and do I really need one at all? In fact, let’s cover that question first.

Do I need a FI controller?

Without getting into a long, semantic debate on “need,” I’ll say this: Your bike from the factory is set up with an air-fuel ratio (AFR is the … Continue Reading

Upgrade Your Bike: Part 1 – Exhaust Selection

At some point in time, almost every motorcyclist comes to the realization that their stock bike is just not enough. Often, the decision to customize boils down to one thing: We all want more power!

When it comes to generating more power, one of the hardest decision to make is where to start and then when to stop. In this series of blog posts, I’m going to review exhaust, cams, and other bolt-on performance upgrades, all of which will help you make a more informed decision surrounding how to get more from your existing bike. Here, I will review the differences in exhaust based on riding style, performance, and cost.  … Continue Reading