Ditch that finicky EFI system. No more Magneti Marelli, Delphi, Delphi 2! Tired of the same old fueling issues on your 1999 to present Twin Cam? No need to worry. We have a tried and trued carburetor conversion kit. Everything you need to swap your existing EFI setup over to Carburation. Fuel tank bungs and plumbing, tunable spark box, HSR42-48 Carb, Air filter, All necessary fittings to get it plumbed up and running. 1260$

1999 to present Harley Davidson Twin Cam 96cui

1999 to present Harley Davidson Twin Cam 115cui and larger Bigtwin Models 

1999 to present Harley Davidson Twin Cam 96cui up Bigtwin Models using standard width manifolds

Available at https://speedmotoco.com/harley-davidson-hsr42-efi-injection-mikuni-conversion-kit-hsr42-19-twin-cams-twin-cam/

Mikuni HSR kits Easy install! SpeedMotoCo

 Mikuni's HSR 42 performance carburetor slips onto your 1999 to 2006 Harley Twin Cam or 1990-1999 EVO engine using the original throttle cables and stock manifold. Mikuni also includes an adapter bracket for fitting an S&S or any CV type carb air cleaner! For the maximum available increase in all round performance and power available, this kit will instantly impress.

• Keeps stock factory look and fit, with better throttle response, improved acceleration, increased power and torque
• Smoothbore, flatslide with roller bearings, and accelerator pump technology delivers peak performance from idle to full throttle
• Comes jetted to work with most applications, though some tuning may be required
• Includes N100.604-165 main and VM28/486-20 pilot for tuning
• Requires Hi-Performance air filter (sold separately)
• Made in the Japan

Mikuni's HSR 42-10 performance carburetor slips onto your 1994 to 2000 Harley Sportster 1200 models using the original throttle cables, the bike's existing manifold and choke cable along with the stock air-cleaner. For the maximum available increase in all round performance and power available, this kit will instantly impress.

• Keeps stock factory look and fit, with better throttle response, improved acceleration, increased power and torque
• Smoothbore, flatslide with roller bearings, and accelerator pump technology delivers peak performance from idle to full throttle
• Comes jetted to work with most applications, though some tuning may be required
• Includes N100.604-155 and N100.604-165 main jets for tuning
• Made in Japan

Sportster - XLH 1200 • 1994-2003 Sportster Custom - XL 1200C 1996-2006 Sportster Sport - XL 1200S 1996-2003

Check it out here on the website: https://speedmotoco.com/mikuni-carburetor-kits/harley-davidson-carburetors/

 

Triump Mikuni Carb Kits!

Wake Up Your Triumph: Why a Mikuni Carb Kit from SpeedMotoCo is the Best Upgrade You’ll Make

If you own a vintage Triumph—like a Bonneville, Tiger, or TR6—you already know what it's like to ride a piece of history. But as much as we love the soul of these British twins, the stock Amal carbs can be… let's just say, temperamental. That’s where the Mikuni carburetor upgrade kit comes in.

?️ Why Upgrade to a Mikuni?

Mikuni carbs are known for their reliability, smooth throttle response, and easy tuning. Here’s why riders make the switch:

• Kickstart-friendly: Easier cold starts, especially on kick-only bikes.

• Set-it-and-forget-it: Less fiddling than stock carbs—no constant adjustments.

• Improved fuel atomization: Better throttle response and smoother power delivery.

• Bolt-on kits: Most kits come with proper manifolds, throttle cables, filters, and are jetted for your specific engine.

What Comes in our Mikuni Kit for Triumphs?

Most Triumph Mikuni kits include:

• A pre-jetted Mikuni VM or TM carburetor

• Intake manifold adapter (often aluminum)

• Throttle cable (for stock or aftermarket throttle controls)

• High-flow air filter

• Detailed installation instructions

• Lifetime tech support from SpeedMotoCo

Some setups use single-carb conversions for twin-cylinder bikes (especially Bonnevilles) which simplify tuning and can increase low-end torque.

? Which Triumph Models Work Best?

Mikuni kits are popular for:

• Triumph Bonneville 650 / 750 (pre-1983)

• Tiger TR6 / T120 / T140

• Custom café racers, bobbers, and street trackers

Got a unit or pre-unit motor? There’s likely a kit tailored for it. If you don't see a kit for your motorcycle feel free to reach out--> https://speedmotoco.com/contact-us/

? Real Results from Real Riders

Riders consistently report:

“Starts on the first kick now, even after sitting a week.”

“Throttle response is way quicker, and no more midrange flat spots.”

“Best money I’ve spent on this bike.”

"Friendly staff helped me with all my questions."

? Pro Tip for Installation

Don’t forget to check your ignition timing and valve clearances before blaming carb issues. A Mikuni can’t fix deeper engine problems—but it sure can make a good motor sing. Knowledge is power. We are here to help!

? Ready to Upgrade?

Check out our full range of Mikuni VM and TM kits for Triumph. We only stock quality, pre-jetted kits made to fit vintage British twins—so you can spend less time tuning and more time riding.

Mikuni RS 34, 36, 38 Carburetor Kits NOW AVAILABLE at speedmoto

 

Mikuni RS 34, 36, 38 Carburetor Kits NOW AVAILABLE

Looking to spice up or revitalize your old Japanese inline 4 cyl? Look no further! Speedmotoco is now offering Mikuni RS Series Carburetors for your Honda, Yamaha, Suzuki, Kawasaki Inline 4 cyl. Unmodified, or even souped up race engines, we have the kit for you. The Mikuni Rs series carbs offer more power, snappier throttle response and more refined power curve. These are brand new genuine Mikuni carbs straight from Japan. Dont see your bike listed? Shoot us a call or email 541-687-6400 or shop@speedmotoco.com. We will put together a custom kit just for you!

Mikuni HSR EFI conversion kits for all types of Harley Davidsons from SpeedMotoCo

 

Mikuni HSR EFI conversion kits!

We offer many different types of Harley EFI to carb conversion kits! Ranging from 1100-1700$. Mikuni Advertises the HSR as a bolt on 15hp/10tq. Get rid of your pesky fuel Injection. No electronic hassle to worry about. Listed below are the Carbs/ Ignitions we offer. You can find all of the kits here. If you dont see your bike listed, shoot us a call or email! 541-6876400 or shop@speedmotoco.com

HSR42/45/48 Raw & Polished available

All of the carburetor kits are complete total kits. They include Carb, Breather Kit, Manifold, and chrome air filter kit.

Ignition Modules Available.

Thunderheart Igntion. This is the most cost effective kit, it includes everything you need from ignition module, coil, wires, mounting plate. Below is the install instructions. A simple power/ ground and crank sensor output is needed. 

https://thunder-heart.com/Tech%20Service%20PDFs/EI5012.pdf

TC88 Plug-N-Play Single Plug. By far the easiest to install, comes with a fully programable Ignition, and a new harness that will plug into your stock wiring harness. Power/Ground, and your tach output only wiring required. This is a Daytona-twin-tec product. Fits some 2004-2017 Twin Cam models.  Linked below is the manufactures listing with all the install and fitment instructions.

https://daytona-twintec.com/product/30081-t-complete-tc88-ignition-and-harness-kit-race-twin-cam-1999-2003/

TC88 Plug-N-Play Dual Plug. By far the easiest to install, comes with a fully programable Ignition, and a new harness that will plug into your stock wiring harness. Power/Ground, and your tach output only wiring required. This is a Daytona-twin-tec product. Fits some 1999-2004Twin Cam models. Linked below is the manufactures listing with all the install and fitment instructions.

https://daytona-twintec.com/product/30080_tc88-ignition-and-harness/

TCFI Gen 4 Fuel Injection Controller for 2001-2013 Harley-Davidson® with 36 Pin Delphi® System. This kit fits most of the 36 PIn Delphi Bikes. Comes with Ecu, Controller, USB interface, and wideband. Very cool kit. Linked below is the manufactures listing with all the install and fitment instructions.

https://daytona-twintec.com/product/tcfi-gen-4-system/

Petcock and Petcock Adapters. All of the kits come with genuine Pingel petcock adapters and block off bungs. Magneti Marelli, Delphi Single, And Delphi Dual are available. Please select your kit in the drop down menu on listing.

The petcocks include are harddrive side exit petcocks.

Cb350 Retro racer build ~ cheap and easy. Part 1

  We have a decent amount of parts laying around the shop and decided to throw some parts on the old cb350 we had laying around.

 We wanted to leave the bike with stock suspension and build using the basic tools a guy or gal would have access to and on a budget.

        First thing on the list was to ditch the rusted and pitted forks and throw on some forks

uppers https://www.speedmotoco.com/cb350-Honda-Fork-tubes-CL350-p/smc3954045.htm  and

tapered bearings and swing arm bushings  https://www.speedmotoco.com/product-p/ole-wobbly-350.htm  from  SpeedMotoCo.

  Make sure to use the proper fork seals. We use OEM part #  91255-286-003 available here

 https://www.speedmotoco.com/Fork-Seal-cb350-cl350-1968-1971-p/91255-286-003-.htm



    That's all for today! stay tuned!

2011 zx6r Cafe Fighter Build

 Last years race bike is this months new project!

126hp on pump gas. 129 on MR12.

Number plate with integrated LED headlight.

More details to follow.

All www.speedmotoco.com parts!