INDIAN CHIEFTAIN HOP-UP
With Indian Motorcycle’s Chieftain, there aren’t a ton of aftermarket manufacturers making performance products for the Thunder Stroke 111 engine just yet. But many are jumping on board because of the increasing popularity and interest in the lineup. However, companies like Lloyd’z Motorworkz, Arlen Ness, and Fab28 Industries are making some pretty killer components for the Indian Chieftain models. After securing an Arlen Ness air cleaner and Fab28 Industries exhaust, we grabbed a new set of 558 cams from Lloyd’z Motorworkz. Last, we had to tie these new upgrades all together, so we went to Dynojet for its Indian-specific tuner, the Power Vision CX. Running this new setup got us from 76.3 hp and 106.8 foot-pounds of torque to 87.5 horsepower and 113.2 foot-pounds of torque.
LLOYD’Z PERFORMANCE INDIAN MOTORCYCLE 558 CAMS
The 558 cams from Lloyd’z are equipped with exclusive decompression releases, so you don’t have to swap out the decompression arms from the stock cams. The 558 cams will run you $625 and will come with a new cam cover gasket. While swapping out these cams in the Thunder Stroke 111, there are tools to make the job a breeze. These are the gear backlash tool and the cam changing tool, both of which have been designed and perfected by Lloyd’z Motorworkz. Save yourself some time and make sure you get these tools for the job. You’ll thank yourself later.
FAB28 INDUSTRIES 2-INTO-1 EXHAUST
The bare, stainless-steel short 2-into-1 completely screams raw power. Just the raw look with exposed welds gives off the vibe of putting down high numbers. The Fab28 stainless 2-into-1 not only looks rad, but it also sounds amazing paired with the cam upgrade in the Thunder Stroke 111 motor. It produces a very deep, choppy rumble, definitely letting you know there is some motor work hiding in here. You are looking at a price tag of $1,499 for the stainless short 2-into-1.
NINETY-DEGREE AIR-CLEANER KIT FOR 111 THUNDER STROKE ENGINE; BEVELED COVER, BLACK
A new air cleaner is a must when upgrading performance pieces on your motorcycle. No matter what you do, you need that high-flow air cleaner pulling in more air to supply the beast. The Arlen Ness 90-degree air-cleaner kit does just that. It pulls in more air for you while adding a rad touch of flare to the left side of the bike. The air-cleaner kit will run you $439.95, and comes with everything needed to install and get those performance gains. The company offers six different color options, ours being the beveled cover in black.
Once the performance packages were installed, we did some initial dyno runs. We used the Power Vision for the Road Glide and a Power Vision CX for the Indian Chieftain. For the Street Bob, we used the Screamin’ Eagle Pro Street tuner.
As you can see from the Milwaukee-eight graphs (top, middle) we made some good low-end torque from the start. The S&S package’s torque curve shoots straight up to around 1,750 rpm and keeps climbing to about 3,000 rpm. The Screamin’ Eagle upgrades are relatively the same in the low revs but remain more consistent throughout the power band and do not drop lower than 100 foot-pounds until about 4,500.
Indian’s Thunder Stroke 111 produced some quality torque and horsepower gains with the components we installed, too. We went from 76.3 hp and 106.8 foot-pounds of torque to 87.5 horsepower and 113.2 footpounds of torque.
We’ll keep working on tuning all these packages to see if we can find more power. If we do, we’ll report our findings at hotbike.com. HB