The Historic Timeline of Big Twin Motors

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August 17, 2012 | By: J&P Cycles

The art of the motorcycle engine has evolved dramatically since the days of the F-Head. In 1921, a Harley-Davidson became the first motorcycle to win a race with an average speed of 100 miles per hour.

The engine — and motorcycles engines in general — have changed dramatically since the early days. Time and technology have taken their toll in both good and bad ways, some would say. During a recent staff meeting here at the J&P Cycles headquarters in Anamosa, Iowa, our resident motorcycle experts and enthusiasts thought it would be interesting to highlight the history of the v-twin engine. From the F-Head, to its evolution as a … Continue Reading

| Comments: 9 Comments | Categorized Under: Harley-Davidson, Motorcycle Engines, Uncategorized

A Primer on Motorcycle Oil — Without the Controversy

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January 12, 2012 | By: Scott Holton

There’s always been confusion and conflict when it comes to any discussion about oil, which is of course, the lifeblood of our beloved motorcycles. And I’m probably not going to bring world peace to this topic with anything I’ll say in today’s blog post. Truth be told, this topic has created more debate on our Riders Forum on the J&P Cycles website than any other subject.

In fact, I’m mostly going to stick to the facts in this post, steering away from the controversies for the most part. First off, let’s explore the function of oil in an internal combustion engine — the educational portion of this segment. There are … Continue Reading

| Comments: 19 Comments | Categorized Under: Motorcycle Accessories, Motorcycle Engines, Motorcycle Tips, Uncategorized

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

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January 27, 2011 | By: Scott Holton

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 EPA … Continue Reading

| Comments: 11 Comments | Categorized Under: Dynojet, Motorcycle Engines, Tech Tips