A Honda XR650R Custom Flat Tracker by Mule Motorcycles

This article was written by Richard Pollock, the founder of Mule Motorcycles – When possible we like to bring you the story of a bike in the words of the people that built it to cut out the middle man and give unfettered insight into their methods and thinking.

My friend Adam Lesley, whom I had previously built a Sportster 1200 Hooligan racer for, approached me with interest in building a flat track “framer” – a framer is a motorcycle with a lightweight frame designed for dirt track racing that doesn’t need a frame able to handle motocross or enduro racing.

Now, Adam is a big guy. 6’5”, 270 lbs, so I try to steer him away from a framer build, as most of the framers would not be suited to his size and most likely could not even be modified to fit him.

Having successfully built and raced a Honda XR650R (a water-cooled 650), in 2000-2004, and knowing that the bike is physically much bigger than any framer, I convinced a reluctant Adam to go in this direction. Further, I was keen to improve on my 2000 version with what I had learned in the last 20 years of bike building.

Adam sourced a box stock 2002 XR650R unit with almost zero hours on it, from a business partner and dropped it off. All stock parts that would not be used were removed and returned to Adam, leaving only the core bike.

The complete, heavy, stock front end was also removed and replaced with a set of Weiss flat track triple clamps and Honda Hawk NT650 41mm forks. Chosen for their length and light weight, stiffer Racetech springs were installed. The sliders were extensively trimmed and powdercoated. A custom fork stop plate was fabbed up to allow lots of fork lock for its intended flattrack usage.

Out back, a widened Champion style rear loop was bent up, had assorted tubes fitted for mounting and an aluminum inner fender to keep debris from the wheel away from the intake system and shock.

The shock was reworked for the rider’s weight and lowered to the proper height for flattrack. Randy Blevins constructed the beautiful exhaust which gives plenty of clearance and increased power everywhere and easily meets the local track sound limit of 100db with just 96.5db out the noise hole.

A lot of work went into the fuel tank. I acquired a pretty good (only minor dents), 1977 TT500 Yamaha aluminum tank several years ago which I gave to my friend/fabrication/welder/ex-Ascot racer Sal Peluso. I said, “If you get bored and need something to do, see if you can make this beautiful”.

A year or so later after removing the tunnel, the outer shell was perfect, but destined to be put on the shelf for a future project. Fast forward 5 years, the tank would have a new home. With a 1.5” strip removed from the center section, the tank was now considerably narrower. Next, friend Jim Bandelin (Competition Sheetmetal), who has started building some beautiful frames and fuel tanks, volunteered to finish off the tank with a new tunnel and cutouts for the radiator plumbing.

That done and all the detail work addressed, Adam raced the bike in February at The One Moto Show, indoor short track in Portland, Oregon. As the motor was all stock, the decision was then made to “bump” the horsepower! The cylinder head and cylinder were sent to Tom Morgan (Tom Morgan Racing), in Wisconsin. Tom did the head modifications and had the bore increased for a 680cc displacement.

Along with a Megacycle cam and mods to the stock carb, big improvements were achieved! While the motor was apart, Dave Tovar at Superbike paint mixed up and applied the brightest red coating in the world!

The first track test with the motor upgrades revealed that power won’t be an issue ever again. Along with gearing and some other minor tweaks, the 20 year old bike will be extremely competitive.

If you’d like to see more of Richard Pollock’s work you can click here to visit the official Mule Motorcycles website.

Above Image: The stripped back Honda XR650R before the build commenced – the starting point.

Founder + Senior Editor

Ben Branch has had his work featured on CNN, Popular Mechanics, the official Smithsonian Magazine, Road & Track Magazine, the official Pinterest blog, the official eBay Motors blog, BuzzFeed, and many more.

Silodrome was founded by Ben back in 2010, in the years since the site has grown to become a world leader in the alternative and vintage motoring sector, with millions of readers around the world and hundreds of thousands of followers on social media.

You can follow Ben on Instagram here, Twitter here, or LinkedIn here.

Recent Posts

  • American
  • Gear
  • Whiskey

The Ragproper Leather + Glass Flask – $80 USD

  This is the Ragproper Leather + Glass Flask, it's made from heavy-duty glass that resists bumps, drops, and mishaps,… Read More

October 23, 2020
  • Cars
  • Classic Cars
  • Films
  • Porsche

Silodrome’s First Film: The 320 bhp Rennsport Porsche 911 ST

  This is Silodrome's first film and we're really proud of it, please consider giving it a thumbs up on… Read More

October 22, 2020
  • American
  • Clothing
  • Gear

Death Pegasus – A New Collaboration T-Shirt by Nowhere Fast + The Selvedge Yard

This is the new Death Pegasus t-shirt by The Selvedge Yard with art by Devyn Haas of Nowhere Fast. If… Read More

October 22, 2020
  • Buying Guides
  • Cars
  • Classic Cars
  • Italian

Fiat X1/9 Buying Guide – Including The Bertone X1/9

The Fiat X1/9 – A Fiat With a Difference To understand the reasoning behind the Fiat X1/9 it is perhaps best… Read More

October 21, 2020
  • Gear
  • Style
  • Watches

Sinn U1S – A Dive Watch Made From German Submarine Steel

  The Sinn U1S is one of the newer releases from Sinn Spezialuhren, a German company that has been building… Read More

October 21, 2020
  • British
  • Cars
  • Classic Cars

The Super Bond Bug – A 150 bhp Superbike-Powered Three-Wheeler

The Bond Bug isn't the sort of car you'd typically associate with speed. It only has three wheels after all,… Read More

October 20, 2020

Notice: AMPforWP\AMPVendor\AMP_Post_Template::get was called incorrectly. Called for non-existant key ("metadata"). Please see Debugging in WordPress for more information. (This message was added in version 0.1.) in /home/288206.cloudwaysapps.com/kxhpffkugw/public_html/wp-includes/functions.php on line 5225

This website uses cookies.