Engine Parts
Replacement Pistons  447 Big Bore Kits   Rings   Valves  Valve Seals   Cam Chains  Cam Chain Guide 
Engine Gaskets   Side Cover Gaskets  Cylinder Head & Base Gaskets  Tappet Cover Gaskets
O-Ring Sets  Gasket Sealer  Clutch Discs   Clutch Springs   Oil Seals  Oil Filters Drain Plug Gaskets  Starter Gears

SPIN-ON OIL FILTER CONVERSION

Will it make your XS engine last forever?

This replaces the filter screen in the side cover with a modern, disposable filter, available in chrome and black. It projects about 2", giving a burly, modified look. Everyone will know you love your XS enough to give a supply of clean oil. Side cover must be removed and 2 holes drilled and 2 holes filled with J-B Weld. Kit includes: Adapter and gasket, hardware, and 620 Loctite.

#CEN13-44100....  $84.95

4 filters available: black or chrome, with or without safety wire---$6.49 to $14.50

Oil filter installation instructions

750cc BIG BORE KITS

Fits motors with 447 connecting rods (1974 and newer engines) .
We offer 2 bore sizes for these engines. 
Each kit includes (2) of the 9.5:1 compression Wiseco brand
pistons that are good for pump gas.
(2) Sets of Piston Rings , Piston Pins and Clips.
(2) cylinder sleeves and a special Big Bore head & base Gasket.
80mm, 744cc Kit #CEN10-7500 ..... $400.00

81mm, 752cc Kit  for 74 - 84 #CEN10-7501 ..... $400.00

Sleeve installation is available for $300.00 plus
shipping, call or E-mail before shipping your cylinders.

WRIST PIN OILING MODIFICATION

This modification helps keep the soft small end of the stock rods live, a real problem with 750s

especial when run hard or raced. Once the copper plating is damaged, they WILL be seeking daylight.

# CEN50-10101...... $50.00/pr

With sleeve installation # CEN50-10100...... $40.00/pr

Replacement Oversize Pistons

These fit the 447 engines produced from 1974 - 1984.
Each brand new piston comes complete with Rings,
Piston Pin and Pin Retaining Clips as shown. Made in Japan
to exacting dimensional specifications for replacement pistons.
Available in first (0.25mm), second (0.50mm) and third (0.75mm) oversize.
They are sold each, so order 2 for each engine. $78.00 each.

Standard Size Piston Rings
Quality piston rings, standard thru 1.00mm oversize bore size
ONLY for the late model, 447 motors, 1974 -1984.
Sold PER PISTON, order 2 sets #PRINGS ..... $29.00 per set.

Standard Size Piston Rings
Quality 256 piston rings, standard bore size ONLY
for the early motors, 1.5mm top ring 1970-1973.Sold PER PISTON, order 2 sets

 #CEN49-2560 ..... $50.00 per set.

Intake Valves

 Intake valve and (2) keepers.
Sold each. ML01-9091..... $21.95

2mm Oversize Intake Valves

 Intake valve and (2) keepers.
Sold each. CEN28-28420..... $33.95

Exhaust Valves

Exhaust valve and (2) keepers.
Sold each ML01-9029 ..... $26.95

Valve Stem Seals
Sold singly. Fits 70 thru 84 engines

#MA11-1477 ..... $2.00 Each.

Cam Chains
Tsubaki cam chain, endless, better than OE quality, fits '74 up, #12-8095 .....  $51.95

Cam chain master link, must be purchased with the above chain
(NOTE: It ONLY fits this chain), #12-1217 ..... $5.95

Tsubaki cam chain, better than OE quality, fits 70-73.
 #12-4977 .....  $39.95

Cam chain master link for 70 - 73.
Must be purchased with the above chain.
(NOTE: It ONLY fits this chain)
#12-0360 ..... $5.95

Front Cam Chain Guide

Front Cam Chain Guide, fits all years.
#MXS05-0006 ..... $23.00

Copper Head Stud Sealing Washers

Replace the stock sandwich washers with these copper to stop head and base gasket leaks,

 especially on built motors. 4 required.

#CEN98-0144--$2.25 each

Engine Gasket Sets

Complete Engine Overhaul Gasket Set.
European made, top quality gasket sets.
Includes O-rings, gaskets, valve seals and exhaust gaskets too!
Fits the XS1, XS2, TX and all the XS650's from 70-84
(Note: Set does not include oil seals, they are sold below)
#DX58-3622 ..... $51.95

Side Cover Gaskets
   
Quality, individual  Rotor/Stator (left) or Clutch (right) side cover side cover gaskets.
All Years $8.95 each

Cylinder Base Gasket

Quality, die-cut cylinder base gasket for all XS650's.
#basegskt ..... $8.95

Cylinder Head Gasket

Quality, die-cut cylinder head gasket for all XS650's.
#headgskt ..... $10.95

Valve Tappet Cover Gaskets

Quality, die-cut valve tappet cover gaskets.
Sold in sets of (4).
#tappetgskt ..... $8.95

Top End O-Ring Sets

Top end O-Ring sets for the XS650 by Athena.
These premium quality O-Rings are made of specially compounded rubber.
The set contains the following: Cylinder base R-Rings,
Cam seal housing O-Rings, Rocker shaft cover O-Rings and
Cylinder head stud O-Rings. An entire rebuild can be ruined due to a
faulty old O-Ring, so replace all those seals with this set to ensure leak free operation.
#RCO982 ..... $9.95

Three Bond Liquid Gasket

Three Bond Liquid Gasket 1104 is a semi-drying OEM approved liquid gasket formula
which forms an elastic, reliable gasket seal. It is resistant to damaging fluids, chemicals, heat,
pressure and impact. Three Bond 1104 repairs engine gaskets - reinforces regular paper
gaskets. We use it as a substitute for "yamabond" gasket sealer on our engines.
3.5 oz (100g) tube..... $6.49

Gasgacinch Gasket Sealer

The gasket sealer that holds gaskets in place during assembly of parts like
no other you have ever used! Comes in a 4oz can with a swab applicator
attached to the top. Quick drying and fast sealing formula.
DS-173402 ..... $7.95

PRO Brand Clutch Discs

For 1974 - 1979, order 7 discs.
For 1980 - 1983, order 6 discs.
#K39-1551 ..... $7.95 each

Ferodo Premium Clutch Plate Kit
Friction discs, 74-79, 7 discs
#FCD 0203..... $79.95 kit

EBC Clutch Springs

Fits 1974-1979
Springs are 10% stronger than stock springs.
Spring set, #CSK2 ..... $13.95
Spring free length is about 1.445".

Fits 1980-1983
Springs are 10% stronger than stock springs.
Spring set, #CSK14 ..... $13.95
Spring free length is about 1.675".

Clutch Rod Oil Seal
That pesky little clutch rod seal behind the drive side cover.
#CRSEAL ..... $9.95

Engine Oil Seal Kits
This set contains oil seals for all years of the
TX & XS650 engine. It includes: countershaft, crankshaft,
(2) camshaft, shifter, kick starter, clutch rod,
decompression lever and electric starter seals!
#WWSEAL ..... $29.00

Oil Filters

Replacement Oil Filter.
This unit will replace the filter in the
right side cover On all Yamaha XS650's.
Why change your oil and not change your filter?
It's cheap insurance for your engine!
#15-65-01 ..... $8.00

Replacement Sump Oil Filter.
The XS650's are known for a weak original equipment
sump oil filter. We rarely see one that is not torn.
Replace your torn, ineffective sump screen with our
OE style reinforced sump screen.
Stop those harmful contaminants before
they circulate through you engine!
#15-65-00 ..... $24.00

Drain Plug Gaskets

Replacement Copper Drain Plug Gaskets.
Stop that pesky leak and keep your bike clean!
Fits all XS650's.
You get (2) copper gaskets.
#173-802 ..... $3.00/pair

Electric Starter Repair Kit

This spring and gear set replaces the worn #4 gear in the starting system so
often responsible for that nasty grinding sound and "kicking out"
of the electric starter on the 72-83 XS650's.
#4GEAR ..... $89.95