INSTALLATION and MAINTENANCE Instructions for the Inferno Racing clutch with a needle bearing. This clutch is a two (2) piece mechanism. There is a potential that if the clutch is not assembled or installed properly that serious injury can occur.

⚠️ WARNING It is VERY important that you follow all the steps for proper clutch installation.

⚠️ WARNING Do not operate without proper guarding/cover.

NOTE: YOU MUST CLEAN A NEW CLUTCH TO REMOVE THE RUST INHIBITORS PRIOR TO FIRST USE.
For best results, perform the following weekly maintenance:

FIRE CLUTCH – The FIRE clutch has a bonded friction lining on the shoe and operates in a 4 1/8″ inside diameter drum. The clutch should be cleaned with brake cleaner. Do not sand the drum or shoes.

FLAME, FURY, & BLAZE CLUTCH – These clutches have powdered metal shoes and 4″ inside diameter drums. For best performance, the clutch should be cleaned with WD-40 only! Do not use brake cleaner!

The needle bearing should be lubricated with a small amount of high-temperature bearing grease. Do not over-lubricate the bearing. Do not spray lube on the chain next to the drum.

THE FOLLOWING STEPS ARE ILLUSTRATED WITH THE FIRE DRUM AND FIRE SHOE.
THE FLAME, FURY, & BLAZE FOLLOW THE SAME ASSEMBLY STEPS.

 

“INBOARD” MOUNTING OF THE SPROCKET

 

STEP 1

 

Install the crankshaft spacer.

The large chamfer on the inside is designed to give clearance over the radius on the crankshaft.

 

STEP 2

 

Install a ¾” x 1 1/16” O.D. x .04” thick steel washer against the crankshaft spacer.

 

STEP 3

 

Install the bearing race.

 

STEP 4

 

Lube the needle bearing with a small amount of high temperature bearing grease and install.

 

STEP 5

 

Assemble sprocket and drum, install the retaining ring bowed side up.

 

STEP 6

 

Install the drum/sprocket.

The sprocket will slide over the needle bearing easier if you rotate the drum while installing.

 

STEP 7

 

Install a ¾” x 1 1/16” O.D. x .04” thick steel washer against the race.

 

STEP 8

 

Install the grease trap with the sprocket side facing the sprocket.

The sprocket side is stamped “SPROCKET SIDE”.

 

STEP 9

 

Install the ¾” x 2 ¼” O.D. x 1/16” thick spring/shoe retaining washer.

 

STEP 10 – CLUTCH ORIENTATION

 

STEP 11

 

Clutch assembled to your preferred engaging speed and orientation on the clutch hub.

Install the shoe/hub assembly.

 

STEP 12

 

The clutch will be clamped tight on the crankshaft to minimize fretting of keyway or damage to the integral key in the clutch hub.

 

STEP 13

 

Install bolt, lock washer, and mounting washer. Torque to engine manufacturer’s specification.

 

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 “OUTBOARD” MOUNTING OF THE SPROCKET

 

 

 

STEP 1

 

Install the crankshaft spacer.

The large chamfer on the inside is designed to give clearance over the radius on the crankshaft.

 

STEP 2

 

Install a ¾” x 1 1/16” O.D. x .04” thick steel washer against the crankshaft spacer.

 

STEP 3 – CLUTCH ORIENTATION

 

 

STEP 4

 

Clutch assembled to your preferred engaging speed and orientation on the clutch hub.

Install the shoe/hub assembly.

 

STEP 5

 

Install the ¾” x 2 ¼” O.D. x 1/16” thick spring/shoe retaining washer.

 

STEP 6

 

Install the grease trap with the sprocket side facing the sprocket.

The sprocket side is stamped “SPROCKET SIDE”.

 

STEP 7

 

Install a ¾” x 1 1/16” O.D. x .04” thick steel washer against the race.

 

STEP 8

 

Install the bearing race.

 

STEP 9

 

Assemble the sprocket and drum, install the retaining ring bowed side up.

 

STEP 10

 

Lube the needle bearing with a small amount of high temperature bearing grease and install.

 

STEP 11

 

Install the drum assembly.

Rotate the assembly while inserting over the race.

 

STEP 12

 

The clutch will be clamped tight on the crankshaft to minimize fretting of keyway or damage to the integral key in the clutch hub.

 

STEP 13

 

Install bolt, lock washer, and mounting washer.

Properly torque to engine manufacturer’s specification.