Timing Chain Kit Duplex Morris Minor & MG Midget, Classic Mini 998cc & 1098cc 10M820

Timing Chain Kit Duplex Morris Minor & MG Midget 998cc & 1098cc    10M820

Duplex Timing Chain Kit The Duplex chain was standard on the 1275cc A-Series engines, but can be adapted easily for the smaller A-Series engines 803cc 948cc 1098cc

Contains: Cover Seal, Gasket, Chain, Tensioners & Lock Washer

Click on the Download Icon to get a Copy of the Installation Instructions.

This is a 10 piece kit

A duplex (double-row) timing chain offers significantly greater strength, durability, and reliability for BMC A-Series engines compared to the standard simplex (single-row) setup.

Key Advantages

* Increased Strength and Durability: The twin-row design shares the mechanical load across two sets of links, making it far more resistant to heavy stress.

* Reduced Stretching and Wear: It resists elongation (stretching) much better than a single chain, keeping valve timing accurate for a much longer lifespan.

* Better Handling of High-Performance Valve Trains: It is ideal for engines running upgraded, high-lift camshafts or stiffer valve springs that put extra physical demand on the timing gear.

* Elimination of Trouble-Prone Tensioners: Standard single chains rely on small rubber tensioner rings that wear out quickly and rattle; a duplex chain maintains proper operation through a precise fit without needing those weak plastic or rubber tensioners.

* Maintains Valve Timing Accuracy: Prevents the ignition and valve timing from slipping out of specification under high RPM or racing conditions.

Kit Comprises

1 x 10M507  Front Cover Gasket   

1 x 10M143A  Cam Sprocket

1 x 10M135A  Crank Sprocket

1 x 10M148A  Timing Chain

1 x SS110        Felt Seal

1 x 10M506     Oil Seal

1 x 10M138A        Lock Washer Cam Shaft

1 x 10M164        Lock Washer Crank Shaft

2 x  CMZ407        Screws         

Suitable for:

Austin A30

Austin A35

Austin A40 Farina

Austin Healey Sprite

MG Midget

Morris Minor

Classic Mini

ADO16 Models

Austin 1100 1300 

Morris 1100 1300 

MG 1100 1300 

Riley 1100 1300 

Wolseley 1100 1300  

ADO16

GSK108a