Pistons, Rings, Pins & clips, cylinders

Big Bore (750cc) Cylinder and Piston Kit for Yamaha XS650

This product is temporarily out of stock.

Big Bore Cylinder and Piston Kit

The Only complete bolt on Big Bore 750cc Cylinder and piston kit ever made for the XS650 Yamaha

Modified limited production European Race Engine Cylinder Block has enlarged fins for improved cooling. The New Cylinder Block has longer fins matching the Head Fin Length.
Kit Fits: 1974-84 447 Type Engines

Kit Includes:

  1. XS Performance Big Bore Race Cylinder Block with sleeves installed and finished to fit our 80mm. Forged Big Bore (750cc.) Pistons. Cylinder casting has larger cooling fins that extend out the same distance as the cylinder head fins for enhanced cooling. No modifications to engine cases needed.
  2. Forged 80mm. 750cc Big Bore Piston kits(2) complete with Ring Sets, Piston Pins & Clips. Forged 447 type Pistons feature:
    1. Valve pockets cut for large valves.
    2. Mos2 treated piston skirts.
    3. Oil channel for enhanced piston pin oiling.
    4. 20mm. piston pins that are internally tapered to ends for weight reduction.
    5. Lightweight 9:1 compression pistons. Assembly - Weight approx. 455 Grams.
  3. Big Bore Cylinder Head Gasket & Base Gasket.

Fitted with our XS Performance Camshaft, Dellorto Carbs, a free flowing Exhaust and Iridium spark plugs will result in about 65 Rear wheel Horsepower or more and 50 foot pounds of Torque.

Dyno Chart 1 Dyno Chart 2

Part #05-0750
$699.00 USD Kit
Out of Stock

Big Cylinder Block for 650cc Standard Bore - Yamaha XS650

Big Cylinder Block for 650cc Standard Bore - for all Yamaha XS650's 1974-84.
Part #05-0658
$399.00 $379.00 USD Ea.
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Big bore (80mm.) Piston kit

Big bore (80mm.) Piston kit - for 750 engine kit for Yamaha XS650's

*** Contains one of each, piston, ring, clip
Part #05-0752
$116.00 USD Kit
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81mm. Forged Big Bore Piston Kit for 750cc Big Bore kit

XS Performance 1st. oversize (81mm.) Forged Big Bore Piston Kit.
Piston includes ring set for 1 piston, piston pin(1) and pin clips(2).
Forged Piston features:
1. - Valve pockets cut for large valves.
2. - Mos2 treated piston skirts.
3. - Oil channel for enhanced wrist pin oiling.
4. - 20mm. piston pins that are internally tapered to ends for weight reduction.
5. - Lightweight 9:1 piston assembly weight of approx. 340 Grams.

Fits to - 1974-84 447 type engines with Big Bore (750cc.) cylinders.
Part #05-0753
$116.00 USD Kit
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81mm. Piston Ring Set

Replacement piston Ring Set to fit XS Performance 81mm. Pistons (XS#05-0753)
Set = Rings for one 81mm. (1st. over) piston.
Part #05-0754
$39.95 USD Set
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80 mm. Piston Ring Set for 750 Big Bore

Replacement piston Ring Set to fit XS Performance 80mm. Pistons.
Set = Rings for one 750cc. XS Performance 80mm. (Standard size) Piston.
Part #05-0751
$39.95 USD Set
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Piston Pin for Forged Big Bore Piston

Piston Pin for our XS Performance forged Big Bore 750cc Pistons.
20mm. piston pin is internally tapered to ends to reduce weight.

Fits: 1974-84 Yamaha XS650 447 & 533 XS Performance 80-81mm. Forged pistons.
Part #05-0749
$13.95 USD Ea
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Piston Pin Clips for Yamaha XS650 type 447 & 533 engines

Piston Pin Clips (Pr.) to fit our Big Bore (750cc) forged pistons and Big Bore Kits.
20mm. size for 447/533 (1974-84) type engines only. Yamaha XS650.
Part #05-0748
$3.95 USD Pk/2
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Big Bore (750cc) Headgasket

Big Bore Headgasket (750cc. - 82mm.). Superior Quality by Athena.
Fits: Our XS Performance #05-0750 Big Bore Kits for 1974-84 447 type engines.
Part #18-0750
$45.25 USD Ea
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Big Bore (750cc) Cylinder Base Gasket

Premium Base Gasket for Big Bore 750cc cylinders (85mm. OD sleeve size).
Stock type stud holes (dowel pins are used).
Fits: Our #05-0750 Big Bore Kit.
Chemically treated gasket material makes improved seal.

Note: No gasket cement to be used on this material.
Part #18-0749
$15.45 USD Ea.
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Big Bore Head Gasket

Big Bore (87mm.) Headgasket for extra large cylinders (approx. 860cc.) No dowel
pins are used on these special large cylinders. 1972-84 type pattern. 10mm. stud
holes. Special high quality gasket material.
Part #18-0853
$56.50 USD Ea
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Big Bore Cylinder Base Gasket

Base Gasket for Big Bore (860cc) cylinders (91mm. OD sleeve size).
No dowel pins are used on these special large cylinders. 10mm. stud holes.
Fits: XS/TX's 1970-84 Special chemically treated gasket material makes
improved seal. (no gasket cement to be used on this material).
Part #18-0854
$16.75 USD Ea
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Performance (stock bore) Cylinder Base Gasket XS650

Base Gasket for Stock Bore (650cc) cylinders. Stock type stud holes
(dowel pins are used). Fits: XS/TX's 1972-84 Special chemically
treated gasket material makes improved seal. (no gasket cement to be
used on this material).


OEM Reference #
• 256-11351-00
• 306-11181-00

Part #18-0851
$14.50 USD Ea
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Note: Stock cylinder bore size is usually about 75mm. Stock Piston size is around
74.945mm. and the standard size piston has .945 marked on its top (the "74." is
always dropped). Standard original piston size varies slightly so the piston may
also be marked .965 or otherwise. Standard bore clearance is 0.0020-0.0022 in.
(0.050-0.055mm.) Oversize pistons are marked in mm. A 1st. over piston is
marked 0.25 which is equivalent to 10 thousandths of an inch. 2nd OS is marked
0.50 etc. Top and 2nd. Ring End Gap (measured in cylinder) should be a minimum
of 0.008" and Oil rings should have a minimum gap of 0.012"

Piston - Stock/Standard Size Yamaha XS650

Piston - Stock/Standard Size + piston pin & clips - Fits: 650's 1974-84
OEM Ref.# 447-11635-01-96 Quality made in Japan on all new tooling.

If you want to replace or go back to the stock 650cc piston, this is what you need.
Part #05-0013
$62.95 USD Ea.
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Piston Ring Set - Stock/Standard Size Yamaha XS650

Piston Ring Set - Stock/Standard Size (for 1 piston) Fits: TX/XS650's 74-84
(447 & 533 type engines - 1974-84). OEM Ref.# 447-11610-00-00
Quality Made in Japan on all new tooling.

Note: 447 type Rings interchange with European 533 Rings but pistons do not.
447 rings do not interchange with original 256 rings used on 1970-73 models.

If you want to go back to a stock 650cc piston, this is the ring set you will need.
If you want to replace rings on an original stock size piston this is what you need.


OEM Reference #
• 447-11610-00

Part #05-0016
$34.50 USD Set
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Stock 650cc. Cylinder Sleeve for Yamaha XS650

Stock 650cc Cylinder Sleeve. Replaces damaged or worn out original sleeve so
engine can go back to stock piston size (approx. 74.94MM. or 2.95" ) or any of
it's oversizes. ID, OD, length and thickness dimensions are the same as
original.

Fits: All 1970-84 stock cylinder blocks.

Note: After installation of sleeve into your cylinder, sleeve must be sized
(bored/honed) to accept the pistons you are using. This operation should be
performed by a competent professional machine shop.
Part #05-0758
$116.00 USD Ea.
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Piston 1st. Oversize Yamaha XS650 (0.25mm.)

Piston 1st. Oversize (0.25mm.) + piston pin & clips - Fits: 650's 1974-84
OEM Ref.# 447-11635-01 Quality made in Japan on all new tooling.


OEM Reference #
• 447-11635-01

Part #05-0017
$62.95 USD Ea
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Piston Ring Set - 1st. Oversize - Yamaha XS650 - 447 and 533 engines ( 0.25mm)

Piston Ring Set - 1st. Oversize - 0.25mm. (for 1 piston) Fits: TX/XS650's 74-84
(447 & 533 type engines - 1974-84). OEM Ref.# 447-11636-01 Quality Made in
Japan on all new tooling.

Note: 447 type rings interchange with European 533 rings but pistons do not.
447 rings do not interchange with original 256 rings used on 1970-73 models.


OEM Reference #
• 447-11610-10

Part #05-0018
$34.50 USD Set
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Piston 2nd. Oversize ( 0.50mm)

Piston 2nd. Oversize (0.50mm.) + piston pin & clips - Fits: 650's 1974-84
OEM Ref.# 447-11636-01 Quality made in Japan on all new tooling.


OEM Reference #
• 447-11636-01

Part #05-0019
$62.95 USD Ea.
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Piston Ring Set - 2nd. Oversize ( 0.50mm)

Piston Ring Set - 2nd. Oversize - 0.50mm. (for 1 piston) Fits: TX/XS650's 74-84
(447 & 533 type engines - 1974-84). OEM Ref.# 447-11610-20 Quality
Made in Japan on all new tooling.

Note: 447 type rings interchange with European 533 rings but pistons do not.
447 rings do not interchange with original 256 rings used on 1970-73 models.


OEM Reference #
• 447-11610-20

Part #05-0020
$34.50 USD Set
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Piston 3rd. Oversize

Piston 3rd. Oversize (0.75mm.) + piston pin & clips - Fits: 650's 1974-84
OEM Ref.# 447-11637-01 Quality made in Japan on all new tooling.


OEM Reference #
• 447-11637.01

Part #05-0021
$62.95 USD Ea
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Piston Ring Set - 3rd Oversize

Piston Ring Set - 3rd.. Oversize - 0.75mm. (for 1 piston) Fits: TX/XS650's 74-
84 (447 & 533 type engines - 1974-84). OEM Ref.# 447-11610-30 Quality
Made in Japan on all new tooling.

Note: 447 type rings interchange with European 533 rings but pistons do not.
447 rings do not interchange with original 256 rings used on 1970-73 models.


OEM Reference #
• 447-11610-30

Part #05-0022
$34.50 $24.00 USD Set
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650cc Replacement Cylinder and Piston Kit for Yamaha XS650

Big Fin Cylinder Block fitted to Standard size 650cc. original type
pistons. Includes Cylinder Block, fitted Stock type cast pistons,
piston pins, clips, Head and base gasket and matching piston ring sets.

No core accepted or required.

Kit Fits: 1974-84 447 XS/TX 650 Engines.

Start over at the original stock 650cc. bore size with the improved
cooling and good looks of our Big Fin cylinder.
Part #05-0659
$550.00 USD Ea.
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Piston 4th. Oversize

Piston 4th. Oversize (1.00mm.) + piston pin & clips - Fits: 650's 1974-84
OEM Ref.# 447-11638-01 Quality made in Japan on all new tooling.


OEM Reference #
• 447-11638-01

Part #05-0023
$62.95 USD Ea
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Piston Ring Set - 4th. Oversize

Piston Ring Set - 4th. Oversize - 1.00mm. (for 1 piston) Fits: TX/XS650's 74-84
(447 & 533 type engines - 1974-84). OEM Ref.# 447-11610-40
Quality Made in Japan on all new tooling.

Note: 447 type rings interchange with European 533 rings but pistons do not.
447 rings do not interchange with original 256 rings used on 1970-73 models.
Part #05-0024
$34.50 USD Set
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Big Bore Oversize Piston Ring Set - 6th. Oversize

Big Bore Oversize Piston Ring Set - 6th. Oversize - 1.50mm. (for 1 piston)
Fits: TX/XS650's 74-84 (447 type engines 1974-84). For use with Big Bore 6th.
over piston as listed above. Quality Made in Japan on all new tooling.

OEM reference number 447-11610-60


OEM Reference #
• 447-11610-60

Part #05-0036
$32.00 $15.00 USD Set
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Piston Pin Puller

Piston Pin Puller with adaptors (13,15,16,19mm. OD).
Easily removes XS650 Piston Pins (20 & 22mm. OD) without damage.
Part #35-9070
$31.00 USD Ea
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Piston Pin - (20mm. Dia.)

Piston Pin - (20mm. Dia.) - Fits:1974-84 XS/TX 650's OEM Ref.# 447-11633-00
Made in Japan


OEM Reference #
• 447-11633-00

Part #05-0014
$10.95 USD Ea.
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Piston Pin Clips for 447 pistons XS650

Piston Pin Clips (Pk./2) for 447 Pistons - Fits: 1974-84 XS/TX 650's -
OEM Ref.# 93450-22027 Made in Japan


OEM Reference #
• 934850-22027

Part #05-0015
$3.95 USD Pk/2
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Piston Kit (2nd.oversize - 0.50mm.)

Piston Kit (2nd.oversize - 0.50mm.) for 256 Engines (1970-73 only! ) -
Kit includes: Piston for one cylinder, one Piston Pin (22mm.), 2 Piston Pin
Clips and Rings for one piston - Piston uses high quality 447 type rings and kit
can be used as a set Only. Japanese made superior quality.


OEM Reference #
• 256-11636-02

Part #05-0652
$92.50 USD Kit
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Piston Kit (3rd.oversize - 0.75mm.)

Piston Kit (3rd.oversize - 0.75mm.) for 256 Engines (1970-73 only! ) -
Kit includes: Piston for one cylinder, one Piston Pin (22mm.), 2 Piston Pin
Clips and Rings for one piston - Piston uses high quality 447 type rings and kit
can be used as a set Only. Japanese made superior quality.


OEM Reference #
• 256-11637-02

Part #05-0653
$92.50 USD Kit
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Piston Pin - (22mm. Dia.) - 256 type engine

Piston Pin - (22mm. Dia.) - To fit 256 type pistons - XS1, XS1B, XS2, TX650
1970-73 Only! OEM Ref.# 256-11633-00 Made in Japan


OEM Reference #
• 256-11633-00

Part #05-0656
$13.95 USD Ea
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Piston Pin Clips - 256 pistons

Piston Pin Clips (Pk./2) To fit 256 Pistons - XS1, XS1B, XS2, TX650 1970-73 Only!
OEM Ref.# 256-11634-00 Made in Japan


OEM Reference #
• 256-11634-00
• 93450-24028

Part #05-0657
$2.95 USD Pk2
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Big Bore Cylinder Sleeve

Cylinder Sleeve for Big Bore (750cc) 80mm. Pistons.

Note: Stock cylinder sleeves must be removed and the
cylinder block Must be bored to accept this larger sleeve
and then the new sleeve must be bored to accept the new
larger big bore pistons.
Part #05-0757
$124.50 $114.50 USD Ea.
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Cylinder/Head Dowel Pins

Dowel Pins for cylinder Head or Base - 14mm. OD x 16mm. Long.
Fits: All 650's 1970-84


OEM Reference #
• 91810-16016

Part #05-0740
$9.95 USD Pk/2
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Cylinder Guide Bar Bolt

Chrome Cylinder Guide Bar Bolt (Pk./2) Bolt Passes thru cylinder guide bar nuts
located at Front/center of cylinder casting and secures cam chain guide bar to
cylinder casting (inside cam chain tunnel). Fits: All 650's 1970-84


OEM Reference #
• 97024-06020-00

Part #49-0723
$1.25 USD Pk./2
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Cylinder Guide Bar Nut

Chrome Cylinder Guide Bar Nut (Pk./2) Fits: into Front/center of cylinder casting.
Fits: All 650's 1970-84.


OEM Reference #
• 256-11395-02-00

Part #49-0722
$3.95 USD Pk./2
Add to Cart

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