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ThunderMax® Marelli EFI Conversion Kit for 1995-1998 EVOs® Double click on above image to view full picture

ThunderMax® Marelli EFI Conversion Kit for 1995-1998 EVOs®

As low as: $2,425.00

Price as configured: $0.00

Overview

Stop cussing that early EFI system, just replace it!

Zipper’s has taken the popular ThunderMax®EFI electronics and merged it with a Delphi®-style single-throat throttle body (with the help of some specially made parts) and developed this conversion kit for bikes with the earlier systems. This kit allows you to retain the original wiring harness and gas tank, while upgrading to the same components used in Zipper’s popular high performance Muscle series EFI engine kits for Delphi®-equipped bikes.

In compliance with ARB emissions laws, this product is not sold or shipped to California.

Price as configured: $0.00

Details

Tired of Performance Issues with Your Marelli-based EFI Harley®

 

It’s Time to Upgrade Your EFI System!

 

It’s no secret that the earlier Magnetti-Marelli EFI used on 1995-1998 Evolution® and 1999-2001 Twin Cam® baggers has ‘issues’—hard starting, erratic idle, harder yet to tune.. If these are issues with your MM bike, this kit will solve them!

 

Zipper’s has taken the popular ThunderMax®EFI electronics and merged it with a Delphi®-style single-throat throttle body (with the help of some specially made parts) and developed this conversion kit for bikes with the earlier systems. This kit allows you to retain the original wiring harness and gas tank, while upgrading to the same components used in Zipper’s popular high performance Muscle series EFI engine kits for Delphi®-equipped bikes.

 

Instant starting! Consistent idle! Superb performance! It’s all here in this kit, and the expansive library of ThunderMax® high-resolution base maps will have you up and running in no time.  The ThunderMax with its integrated AutoTune transforms this system to full closed-loop automatic air/fuel ratio correction, maintaining your custom tune no matter what the ambient conditions or elevation you choose to ride in!

 

Includes detailed installation instructions and TMax Tuner software.  See part number descriptions below for available throttle body sizes. For additional information regarding exhaust system compatibility, see below.  You’ll fall in love with your bike all over again! 

 

SPECIAL EXHAUST NOTE FOR MARELLI-EQUIPPED MODELS - ThunderMax® includes wide-band, 5-wire oxygen sensors that thread into 18mm x 1.5mm bungs located near the exhaust port, same thread size and location as stock narrow-band, 2-wire sensors used on 2007 Touring model exhausts (previous year bikes were not equipped with oxygen sensors). If the exhaust system on your motorcycle is not equipped with oxygen sensor bungs in the 2007 location (near the cylinder head exhaust port), 18 x 1.5mm bungs will need to be added to the existing headers, or purchase an exhaust header with bungs installed.

 

 

This product is not for sale or use on pollution controlled vehicles.

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Customer Reviews

1 Item(s)

The difference is unimaginable Review by Jason Kukulka
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I picked up a 98 FLHTCI with the stock MM EFI in late 2014 not knowing of the notorious MM problems beforehand and had 2 full years of nothing but straight headaches, anxiety and a motorcycle as good as a yard ornament. I was completely lost, paying on a bike that was almost unrideable, spending countless hours researching and tinkering with the MM system and was constantly being told to trade it in or to just throw a carb on it. Refusing to be upside down on another bike and learning that a carb install also requires some deep rewiring to do it properly on the EVO’s I called the knowledgeable staff at Zippers in the winter on 2016 to get all of the info on the EFI conversion kit and while the bike was in the shop for upgrades and customization I pulled the trigger on this kit and upon arrival the kit was packaged very professionally and was full of the highest quality parts like the TunderMax auto tune and Horsepower Inc throttle body. The directions are pretty straight forward and the tech had virtually no trouble installing the kit. Upon the very first start up it was like I had a completely different bike that was 20 years newer. Perfect cold idle, amazingly smooth throttle response and once warmed up a steady hot idle! I was nervous of everything at first but having nowhere to turn, this kit was a bike saver for sure. I have now put some miles on the bike and aside from a few coughs here and there I am an advocate and extremely pleased with my purchase knowing that this kit is the best solution to the MM EFI phantoms. I am now proud to say that I have a Zippers/ThundexMax EFI powered EVO that will now live a long prosperous life thanks to the best and only conversion kit out there! (Posted on 11/20/2017)

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Additional Information

Brand ThunderMax®
Fuel / Air EFI
Model No
Engine Type Evolution®
Emissions Compliant No
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