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The Harley-Davidson ® High - Performance Cylinder Head Design and Engine Modification Shop
Complete Engine Rebuilds - Fuel Injection and Carburetor Tuning - Chassis Work - Parts - and More ..
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Very competitive pricing
 
Harley-Davidson® High-Performance & Reliability Specialists
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johnson engine technology, high performance, performance modifications, contact information, parts, service, performance pacages, how to schedule an appointment, testimonials, dyno runs, photos, job status, warranty information
johnson engine technology, high performance, performance modifications, contact information, parts, service, performance pacages, how to schedule an appointment, testimonials, dyno runs, photos, job status, warranty information
     

EVOLUTION TESTIMONIALS
 

I had the J.E.T. EV-27 perfomance package with Supermegs 2 into 1 installed on my 1998 Heritage Softail.  I also went back to a rejetted stock carb from an S&S "E." 

I should have done this package years ago...Now this bike pulls hard and accelerates so fast as compared to stock that you have to be careful about riding up on people.  It starts easier than when I had an S&S carb and I'm getting 46 mpg on highway running 75 mph.  I love my Supermeg 2 into 1s.  My ears don't ring and I can hear my stereo. {dragonfly fairing installed} I am very happy and I can't wait until my swift bar hopper is off warranty so they can rework my S&S 117 motor.

Richard Ethier
Spencer, MA

1998 FLST
Email Richard for yourself
 

"About 7 years ago you  rebuilt the engine of my 1992 FXRS through American Custom Cycle, Bloomfield, Ct, and I would like to tell you that I am just as pleased now as when I first rode this transformed machine seven years ago.
The engine is wonderful, excellent power across the entire range, and extraordinarily smooth. The best combination of usable power and tractability I've experienced in forty years of owning 40+ bikes.
I've got a terrible addiction to motorcycles, and buy a new one every year; some stay, most go - this FXRS is definitely a keeper.
Thanks for a great job."


Kelly Carlson

 
1992 FXRS
Email Kelly

fxr - evolution - harley  
 

 

" Power from the idle right on up, with better than stock mileage ...who could ask for more? "

Jack Schuttenberg
Cudderbackville, NY

 

1984 harley davidson fxrt

"Bob,
I have your Jet 560 combo in my big twin Evo. Wow! It has power everywhere; from a low end grunt all the way to 6,000 rpm. More power than I expected, great drive-ability, and 55 miles to the gallon. You most certainly back up your claims. It runs a Mikuni HSR 42 and Bub 2 into 1 header.  I bet you could dial it in even better...
Today I beat a Twin Cam, he had 95 inch 'head work,' choppy cams, Mikuni HSR 42, and a Thunderheader. Not by a lot,... but he was humbled. Ha! He said, 'bring it on'."

Paul Kleronomos
Barrington, IL

 
 
1984 FXRT
 
Paul has our JET 560 combination in his motorcycle.  The parts were shipped to him and installed in IL.

"I have driven 40, 000 miles since J.E.T. worked on my scooter and it runs just as good as the day it left Johnson's. Beat that, a Harley with 40,000 trouble free miles. If you use your bike for more than just driveway jewelry, you have to see this wrench."

On 10-30-02 we came into the office to hear this message on our machine from Mr. Morrissey, who is still pleased with his bike.

"Hi Bob, Jim Morrissey... Just thought I would drop you a little quick line.  After 50,000 miles I decided to ride my bike down to Daytona and back.  Absolutely no problems, and I just love looking at these trailer people and telling them I've got a Johnson engine.  One thing you don't have to worry about, ran great and I had a good time.  Thank you."

One year later:

"I rode my bike to Sturges SD this year, ran about 5,500 miles round trip with no problem. The bike still runs like the day I picked it up. I feel a little guilty, 10s of thousands of trouble free miles. No one builds a Harley like Bob."

Three years later:

"Hi Bob,   My scooter is still running fine. Rode to Manchester yesterday (about 30 miles) She started right up (it was 14 deg and I have no garage) Good ride, a bit nippy.   I'm off to Daytona

Jim Morrissey
Melrose, MA

evolution performance package
Email Jim for yourself
 
   

                       
chopper, evolution motor modified, high horsepower and torque

Brad just recently brought his chopper back in for some more modifications to his bike. "The bike runs so smooth ... I tell you, the motor runs like a top."

Brad Safford
Ashaway, RI

                       

 

Testimonial 1:

I brought a stock bike and left with a NEW bike. I got non-stop power from idle to redline. It is cooler running and more efficient. Much better mileage too. Knowlege and performance, that's Johnsons. I will be sending my Super-X as soon as finances allow. Thanks for your knowlege!

Testimonial 2:

Dear Johnsons, I just got back from a 1800 plus mile trip with a friend who rides a 1500 Gold Wing.  Not only did my bike get 51.8 miles per gallon, but  I could run right with him and on a pass I backed out of the throttle so I didn't run by him. That was not possible with this bike before Thanks for a strong running fuel efficent bike!

Dave Gulrapp
Madison, WI
J.E.T. EV-27 package

 
1993 FLHTC  
Email Dave for yourself
 
                     

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