Manco Dingo Go Kart

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40 and 44 Series Torque Converters

Driver Clutches, Driven Pulleys, Parts and Info

40 Series Drivers

Comet 40 Series Driver Clutch
For 8hp to 18hp, 4 Cycle Engines

Part Number

Description

Price

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203015A

DRIVER 1" BORE 40 SERIES

149.50


Uses a Symmetric, 7/8" Top Width Drive Belt
The Driver Clutch slides directly onto the engine crankshaft.
Requires a crankshaft with a 1/4" keyway and a tapped end.
Clutch Engagement: Minimum 1600 RPM - Maximum 3100 RPM
Use a bolt long enough to engage the threads at least 2 1/2 times the bolt diameter.
This is the most popular clutch in The US for American Go Karts with 8 to 13hp engines.
Fits Brister's Thunder Karts, Ken-Bar, Carter, Manco, ASW, Road Boss and Kartco Go Karts.


The Comet 40 Series and 44 Series are Mid Range Torque Converter Components for 8 to 18 horsepower applications. The 40 Series Driver Clutch fits 1" engine crankshafts with a 1/4" keyway. The 44 Series Driver Clutch is available for 3/4" crankshafts with a 3/16" keyway and 1" crankshafts with a 1/4" keyway. The Driver Clutch drives the system. The Driven Pulley mounts on a keyed secondary shaft, usually a keyed Jackshaft or Differential. Driven Pulleys are available in 5/8", 3/4" and 7/8" bore. The Driven Pulley is driven by the driver. These components are designed to use Symmetric, 7/8" top width drive belts. The Driven Pulleys mount Inboard, with the stock Red Tension Spring facing the engine. Both models were designed for recreational vehicles such as Go Karts, Mini Bikes, ATV's, LTV's and Economy Transportation Vehicles. In short, wherever there's a need for a torque sensitive drive system that's infinitely variable from it's low to high range. How does a Comet Torque Converter work? The driver clutch is activated by centrifugal force from the engine crankshaft. The moveable sheave of the clutch is forced in as the RPM of the engine is increased. This contacts the drive belt. The drive belt will then be forced to a larger diamter within the clutch sheaves, thus pulling it to a smaller diameter within the driven unit sheaves. The moveable sheave of the driven unit is forced out, allowing the belt to seek it's smaller, high speed ratio diameter. As this happens, the speed from the engine transferred to the final drive is increased. Torque Converters use a belt and a chain and are required for go karts with tires taller than 15".

G4000 Driver

1" Bore G4 Driver Clutch
For 8hp to 18hp, 4 Cycle Engines

Part Number

Description

Price

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G4000

DRIVER 1" BORE SYMMETRIC

119.50


Uses a Symmetric, 7/8" Top Width Drive Belt
Requires a crankshaft with a 1/4" keyway and a tapped end.
Clutch Engagement: Minimum 1600 RPM - Maximum 3100 RPM
Use a bolt long enough to engage the threads at least 2 1/2 times the bolt diameter.
Fits Brister's Thunder Karts, Ken-Bar, Carter, Manco, ASW, Road Boss and Kartco Go Karts.
This is a High Quality Replacement for Comet 40 Series Driver Clutch Part #203015A

44 Series Driver

Comet 44 Series Driver Clutches
For 8hp to 18hp, 4 Cycle Engines

Part Number

Description

Price

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209709A

DRIVER 3/4" BORE 44 SERIES

149.50


209418A

DRIVER 1" BORE 44 SERIES

169.50


Uses a Symmetric, 7/8" Top Width Drive Belt
The Driver Clutch slides directly onto the crankshaft.
Requires a crankshaft with a full keyway and tapped end.
3/16" keyway for 3/4" crankshafts, 1/4" keyway for 1" crankshafts
Driver Clutch Engagement: Minimum 1600 RPM - Maximum 3100 RPM
Use a bolt long enough to engage the threads at least 2 1/2 times the bolt diameter.


44 Magnum Driver Dimensions

Choice of 7-37/64"OD or 8-1/2"OD Driven

40/44

IMPORTANT ... The Torque Converter DRIVER CLUTCH MUST NOT FLOAT on the engine crankshaft. It must be bolted tight against the engine crankshaft shoulder. Recommended Torque for bolt - 24 ft. lbs. to 30 ft. lbs. Max.

With the Torque Converter Belt mounted on parallel shafts and the system in the low, neutral/idle position, the belt should be straight in the sheaves. The belt when straight in the sheaves should also be square to the engine crankshaft and jackshaft. The center line of crankshaft and the jackshaft must be parallel at all times.

Comet 44 Series


Driven Pulleys that Use 7/8" Belts

Used with 40 or 44 Series Driver Clutches

40 Series Driven

Symmetrical Driven Pulleys
7-37/64" Outer Diameter Components

Part Number

Description

Price

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G4200

DRIVEN G4 5/8" BORE SYMMETRIC

149.50


G4300

DRIVEN G4 3/4" BORE SYMMETRIC

149.50


G4400

DRIVEN G4 7/8" BORE SYMMETRIC

149.50


The Driven Pulley slides directly onto a keyed jackshaft or differential.
These 7-1/2" OD Driven Pulleys have a Built In Key that can not be removed.


Torque Converter Maintenance


Inspect the torque converter on a regular basis for dirt, frayed belts and any other potential problem obvious from a visual inspection. Always service units before each season. Maximum service interval recommended is each 50 hours of operation.

The Driver Clutch and Driven Pulley should be parallel. Friction faces must be smooth and free of dirt, corrosion, oil or grease. Belt must be dry, straight, and free of cracks, breaks and uneven wear. Operating the vehicle in a dusty environment will require more frequent servicing.

Indicators of a torque converter system requiring cleaning and lubrication are erratic or jerky engagement upon acceleration and a tendency to apparently "lock" into a particular speed. A second cause of jerky engagement is an excessively loose drive chain. If either one of these conditions exist, service the unit immediately. Both the driver clutch and driven pulley should be cleaned.

44 Series Drivens

Comet 44 Series Driven Pulley
8-1/2" Outer Diameter Component

Part Number

Description

Price

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209621A

DRIVEN 3/4" BORE 44 SERIES

159.50


The Driven Pulley slides directly onto a keyed jackshaft or differential.


Driven Pulley Parts

Stock and Reverse Wound Tension Springs

Red Tension Spring

Stock Tension Spring for Driven Pulley

Part Number

Description

Price

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G40110

RED TENSION SPRING

16.50



Adjusting The Spring Tension Of The Driven


By increasing the spring tension of the torque sensing system ... the power ratio of the system (Driver and Driven) can be held longer at higher engine r.p.m.'s before it's overcome by the clutch driver.

To shorten the time required for the driven member to attain it's speed ratio, DECREASE the amount of spring tension of the torque sensing cams. This will allow the r.p.m. of the drive clutch to overcome the power ratio of the driven unit at a faster rate in a lower r.p.m. range.

Reverse Wound 204524

Comet Reverse-Wound Spring for Driven

Part Number

Description

Price

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204524A

YELLOW SPRING REVERSE WOUND

22.50


Used on some Manco 10hp Go Kart Models.
Allows 40/44 Driven Pulleys to be mounted with the spring & movable sheave Outboard.

Cam Buttons

Set of 3 Insert Buttons For Driven Pulley

Part Number

Description

Price

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G00140

INSERT BUTTONS G4 SET OF THREE

12.50


For Driven Pulleys that use Three Insert Buttons

GLUE INTO PLACE WITH CONTACT CEMENT OR SIMILAR PRODUCT


Comet Insert Buttons: Don't run the system if any of the three black insert buttons are missing. Missing buttons will allow the driven pulley to open too far. If that happens, the belt can fall down into the driven so far that it makes contact with rivets it's not supposed to be able to make contact with. These rivets usually damage or destroy the belt. Damaged belts that are coming apart leave your components trashed with belt debris that has to be cleaned out. In addition, the buttons also keep the movable sheave from spinning, they reduce friction between the cam and the movable sheave and they prevent metal to metal contact, acting as shock absorbers.

Parts for 40 Series Drivers

These are the Standard Comet Factory Parts

203043 Yellow Spring

40 Series Driver Clutch Spring Set

Part Number

Description

Price

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203043A

SET OF 3 YELLOW SPRINGS 40S

19.50


Roller Weights 40S

Set of 3 Weights for Comet 40 Series Driver

Part Number

Description

Price

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203648A

ROLLER WEIGHTS 40 SERIES

26.50



Factory Authorized Distributor