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515
M-6 Self Adjusting Chain
Tensioner fits Big Twin 4 and 5
speed models with wet clutch.
Replaces factory type detent
adjuster shoe assembly. Tensioner
kit includes all hardware and
instructions for complete conver-
sion. Fits 1965-2000.
VT No. 18-3662
M-6 Big
Twin Unit
HB-125 Big Twin Hydraulic Primary
Chain Tensioner features a steel flapper
valve to control the motion of the piston
which keeps the chain in continuous
adjustment as it is submerged in primary
housing oil. Fits 1965-2000.
VT No. 18-8322
Chain Tensioner Parts fits Big Twin models.
VT No. # OEM
Type
Year
All
Complete Kit
1965-84
All
Complete Kit
B-C-F-G Hardware Kit
37-9030 A 1783
Screw, 10 pack
37-8801 B 3862B
Bolt, 5 pack
18-3682* C 4401W
Hex Bolt, each
28-0225 E 39976-65B Nylon Pad
1965-00
Red Nylon Pad
17-0915 G 39996-65 Lock, 10 pack
18-3218 H 39990-65 Shoe Mount Bracket
1965-00
18-3219 F 39993-65 Plate
18-3622 I 39992-65A Nut and
J 39998-65 Anchor Plate
Anchor Plate w/carriage bolt (K)
37-8802 K 5444
Carriage Bolt, 5 pack
18-3223 I 39992-65A Nut Only
*Note: Early style Hex Bolt, screws into 18-3223 Nut.
York Big Twin
Hydraulic Primary
Chain Tensionator
T M
features a hydraulic
valve which controls
the motion of the sub-
merged piston which
constantly keeps the
chain in tension for
1965-up Big Twins .
VT No. 18-0120
Primary Chain Tensioner
York Chain Adjuster Kits feature
automatic self adjusting by use of
spring loaded shoe.
VT No. Year
18-0580 1965-00
18-0581 2001-up
Primary Chain Nylon Liners.
VT No. OEM
Year
Model
28-0233 39976-65 1965
BT
28-0225 39976-65B 1966-84 BT
1966-84 BT
18-05581 Installed