Mikes XS

High Performance Camshaft and matching performance Valve Spring Kit
(Sold as a kit Only). Cam fits 1974-84 447/533 type engines only.
Camshaft has removable 36 tooth drive sprocket and kit includes special
valve stem seals, Valve Springs and clearance spring caps (No valve guide
mods needed). Cams are machined from New Billets (Not a regrind or hard-weld).
weld). No core is required or accepted. New installed internal bushings
included. Designed as a bolt in kit requiring timing to stock marks to install.

See specifications and Dyno test sheet for more info.

Dyno Test Sheet | Camshaft Specifications & Instructions

Rocker Arm Shaft. Sold each. 4 used per engine. OEM 256-12156-01-00

OEM Reference #
• 256-12156-01-00

219FTSS x106 Endless Cam Chain. Made in Japan. Endless chain preferred for racing applications. Please note that endless cam chains are not easy to install. Fits: SR500 78-81, XT500 76-81 OEM reference 219FTSSx106 EL

OEM Reference #
• 219FTSSx106
• EL

Elephant Foot Valve Adjuster Screw

Cylinder Head Stud for 3 hole Tappet Cover - 6mm. x M1.0 x 30mm. with plated finish. Fits Cylinder Head 3 hole Tappet covers on all 1970-84 650's.

OEM Reference #
• 5V4-11101-00-00

Cylinder Head Stud for 4 hole Tappet Cover - 8mm. x M1.25 x 30mm. with plated finish. Fits Cylinder Head 4 hole Tappet covers on all 1972-84 650's.

OEM Reference #
• 256-11179-00-00
• 90116-06017-00

Performance Valve Spring Set (8 pc.) with steel caps (4 pc.) Special Valve caps provide maximum Cap to stem seal clearance. For use with the XS Performance #05-0025 Cam or Web cams or to replace original stock spring & cap sets. Fits: XS/TX650's 1970-84.

OEM Reference #
• 256-12117-02

Stainless Steel Rocker Shaft Plug with O-ring.
(Set of 4 pc.) - Allen socket head type.

Fits: All XS/TX 650's 1970-84

Aluminum Rocker Shaft Plug with O-ring (Set of 4 pc.) -
Allen socket head type.

Fits: All XS/TX 650's 1970-84

Slide Hammer with correct bolt thread to remove
Engine Rocker Arm Shafts from head cove. Works
on All 1970-84 650's. Easy to use.

XS Performance Rocker Arm Set (4) with Elephant foot floating adjusters - (3mm internal hex type for easy valve clearance adjustments). Each assembly weighs only 5 oz. Fits: All 1970-84 650's. Note: Rocker Arms do Not have the decompressor lip as used on 1972- 73 Models. Sold in Sets of 4 Only. Warning!!! These rocker arms are for use with stock camshafts or our XS Performance cams and with stock diameter valve stems. High lift cams cause the floating adjuster foot to exceed its range.

OEM Reference #
• 306-12151-00
• 306-12151-00-00

Cam Sprocket - 36 tooth replacement sprocket for our 447 type
XS performance cam.

Note: This sprocket does Not fit any other camshaft.

Special 7mm. Bolts (Replacements/Spares) to fasten the cam sprocket to the camshaft on our XS performance Cams. OEM reference # 90105-07004-00 Bolts (not cam 05-0025) compatible with: XS400 (2) FJ1100-1200 (2) XS1100 (2) FJ600 (2) XJ400 (2) VMX12-13 (8) XJ550 (2) FZR1000 (4) XJ700 (2) XT600 (2) XJ1100 (2) FJR1300 (4) YZFR1- (4)

OEM Reference #
• 90105-07004-00

Shim for valve spring seat - Original part used on cylinder head under the valve spring. Steel shim must be in place on head (often missing!) 1pc. fits below each valve spring assembly.

OEM Reference #
• 256-12116-01

Valve Spring Compressor - Large Honda heavy duty type.
This style valve spring Compressor works best on the XS650.

Valve Spring Compressor Tool in case
High quality professional tool to remove valve springs.

Now with 5 Tips! - 16, 19, 23, 25 & 30mm. Dia.

Camshaft Bearing - B16005 (Special C4 Clearance). 4 used per engine. Fits: All XS/TX650's 1970-84. Made in Japan by original supplier.

OEM Reference #
• 93316-00503

Camshaft internal metal Bushing for advance rod. 2 Used per camshaft on 1970-79 XS1, XS2, XS650 models (Points Ignitions) and also required if using Boyer ignitions. Fits inside cam in center (one each side) Note: These are usually missing from 1980-84's.

OEM Reference #
• 90386-12093
• 256-1154-00
• 93316-00501-00

Camshaft internal metal Labyrinth Seal (Bushing) for advance rod. 2 used per camshaft on 1970-79 XS1, XS2, XS650, TX650 models (Points ignitions) and also required if using Boyer ignitions. Fits inside of camshaft and flush with ends (one each side). Note: These are usually missing from 1980-84's. OEM Ref.# 256-11155-00.

OEM Reference #
• 256-1155-00

Camshaft internal cam needle Bearing - (Upgrade/replacement for #05-0032)
Fits: All 650's 1970-84. Mounts flush with cam ends.

Valve Cover Polished 3 Hole

OEM Reference #
• 447-11186-00-00

Valve Cover Polished-Square 4 Hole

OEM Reference #
• 256-11186-00-00

Cam Chain - Daido 219FTss x 106 with rivet link. Pitch .3061" (7.774mm.)
Fits: TX/XS650's 1974-84 (36 tooth cam). The latest high strength cam chain
from D.I.D. for late XS650's. Made in Japan.
Also fits: SR500 E/F/G/H 78-81, XT500 C/D/E/F/G/H Dual Sport 76-81

Installation Note: Cam Chain IS absolutely correct original brand/size/length/type
Original install will be Very tight as chain is pressure injected with grease at factory
and head gasket is not yet compressed. Install with tensioner assembly out and it may
be necessary to pry chain over last half tooth of cam sprocket to get the chain in place
so joiner link can be installed. Chain will loosen once head is torqued and engine is run
a short time.

Rivet Link - D.I.D. 219FTss. Fits: #52-4008 Cam chain. Made in Japan

NOTE: May not fit to old original chains due to later chain dimension and
design improvements made to strengthen cam chain.

Tsubaki BF05M Rivet Master Link Cam Chain replacement link XS650 (74-84), TX650 also fits: SR500 78-81, XT500 76-81 see 52-4048 for cam chain

OEM Reference #
• 94500-02106-00

Tsubaki BF05M x 106 Replacement cam chain for Yamaha XS650's (77-74)

OEM Reference #
• 94590-02101-00

Cam Chain - Tsubaki BF05T x 102 with rivet link. Pitch .315" (8.0mm.) Fits: XS1/XS1B/XS2/TX650 1970-73 (34 tooth cam). Made in Japan NOTE:Link pitch differs from chains used on later 650's. For 70-73 650's Only! Installation Note: Cam Chain IS absolutely correct original brand/size/length/type Original install will be Very tight as chain is pressure injected with grease at factory and head gasket is not yet compressed. Install with tensioner assembly out and it may be necessary to pry chain over last half tooth of cam sprocket to get the chain in place so joiner link can be installed. Chain will loosen once head is torqued and engine is run a short time.

OEM Reference #
• 94510-01102-00
• 94590-02102-00

Rivet Link for Tsubaki BF05T Cam Chain. (as used on XS/TX650's 1970-73).
Made in Japan

NOTE: May not fit to old original chains due to later chain dimension and
design improvements made to strengthen cam chain.

Cam Chain Tool Kit in case - a "must have" tool to Break and Rivet cam chains.
Note: Do Not use for rear drive chains.

Replacement Breaker Pin for Cam chain breaker tool.

Guide Stopper (Front cam chain guide bar) Fits: All TX/XS 650's 1970-84 - OEM Ref.# 256-12231-01 When black plastic bits start showing up in your oil its usually from the guide bar breaking up due to heat & old age. Replace it as the cam chain will next start to saw its way thru the aluminum support.

OEM Reference #
• 256-12231-01

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

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

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

OEM Reference #
• 91810-16016

Cam chain tensioner pivot arm Assembly. Fits: XS/TX 650's 1974-84 OEM# Ref. 447-12220-00

OEM Reference #
• 447-12220-00

Replacement Spring for Cam Chain Tensioner on 1974-84 650's OEM Ref. # 90501-14095/341-12216-02

OEM Reference #
• 341-12216-02
• 90501-14095
• 341-12216-02-00

Cam Chain Adjuster Cap as used on XS650C/D/E/F/G/H/SE/SF/2F/SG/SH 1976-81
Will also replace 82-84 type.
OEM Ref. # 90176-18021-00

Damper that is on Cam Chain Tensioner rod to spring - Original part on XS650H/SH/SJ/ SK (1981-84) - OEM Ref.# 2H0-12232-00. Will replace OEM # 341-12232-02 as used on 1974-80 models.

OEM Reference #
• 2H0-12232-00
• 341-12232-02-00
• 2H0-12232-00-00

Gasket - at base of 6 Bolt Cam Chain Tensioner Case (can use for 4 bolt type). Fits: 1970-84 XS650's OEM Ref.# 306-12213-01

OEM Reference #
• 306-12213-01
• 306-12213-12-00

Valve Lapping Sticks - Set/2

Tool Kit for doing 3 angle Valve Seat Cutting & Finishing.
Kit was created by Mikes XS specifically for overhauling the XS650 cylinder head.
Works on All 1970-84 650 engines.

Kit Contains:
1 - Precision ground T-Handle Valve guide Pilot
1- 36 x 45 degree Carbide Cutter
1- 43 x 30 degree Carbide Cutter
1- 43 x 45 degree Carbide Cutter
1- 43 x 60 degree Carbide Cutter
1- 36 x 45 degree Finishing Stone, 1- 42 x 45 degree Finishing Stone
1 Set/2 Valve Lapping Sticks, 1 Tube Valve Lapping Paste,

Permatex Valve Lapping Paste

1- 36mm. Dia. x 45 Degree replacement Valve Seat Grinding stone for kit #36-0116

1- 42mm. Dia. x 45 Degree replacement Valve Seat Grinding stone for kit #36-0116

XS Performance Polished Stainless steel Exhaust Valve with collets.
Fits: All 650's 1970-84 Replaces OEM #341-12121-01

NOTE: Can only be used with OEM valve springs.

XS Performance Polished Stainless steel intake valve with collets.
Fits: All 650's 1970-84 Replaces OEM #341-12111-02

*** Note Only XS performance springs

Valve Collets (keepers) (Pk/2) for Intake or Exhaust Valve - OEM # 341-12118-00

OEM Reference #
• 341-12118-00
• 447-12113-00-00

Valve Stem Seals (Sold each) - Fits: All 650's 1970-84 Made in Japan - OEM Ref.# 341-12119-00/02 Also fits: SR500 78-81, SR500 82-88, XT500 88, XT500 76-81, TT500 76-81, XV750 82, XV920 82-83, XV1000 83, XV750 81-83, XV1000 84-85, XV920 81-82, XV1000 82, XV920 83

OEM Reference #
• 341-12119-00
• 341-12119-02
• 341-12119-02-00

Premium Valve Stem Seals. Use these with Our New #05-0025 XS Performance Cam(Also Web Cams) and matching XS Performance Valve Spring Sets. Seals are 0.85mm. shorter than our #01-0114 stem seals and this provides additional seal to valve cap clearance needed when using higher lift cams.

OEM Reference #
• 341-12119-00
• 341-12119-02
• 341-12119-02-00

Valve Guide - Intake - Standard size for 1970-84 XS/TX650's

OEM Reference #
• 256-11133-11
• 341-11133-11

Valve Guide - Exhaust - Standard size for 1970-84 TX/XS650's

OEM Reference #
• 256-11134-11
• 341-11134-11

Valve guide Install / remove driver tool for 1970-84 650's

Set = 1 (pc.)Tappet adjuster Screw + (1 pc.) Adjuster Screw Nut - Hex Socket type for easier valve clearance adjustments or to replace originals with damaged or worn hard facing (this causes inaccurate clearance settings). 4 used per engine.

OEM Reference #
• 4X7-12159-00

Tappet cover O-Ring - Made in Japan by original supplier (Ars). Sold Each Fibre gaskets can be used on all 650's, these O-Rings can be used only on engines with the O-ring groove in the tappet cover cap. **** These are sold each

OEM Reference #
• 93210-62451

Tappet cover Gasket (4 Hole) - One piece used on each engine - Fits: All XS650 models from 1972-84. Oem Ref.#306-11198-00 - Note: Gasket can be used in place of O-Rings used on some later models.

OEM Reference #
• 306-11198-00
• 93210-62451-00

Tappet cover Gasket (3 Hole) - Three pieces used on each 1972-84 XS650 engine or 4pc. on all 1970-71 XS1 engines. Note: Gasket can be used in place of O-Rings used on some later models. OEM Ref.# 256-11196-01

OEM Reference #
• 256-11196-01

This product is temporarily out of stock.

Advance/Breaker Housing Screw & washer Set (6pc.Set) - 3 countersunk flat- head type screws and 3 matching starlock washers. 2 sets required to do both engine housings on each engine. Fits: All 650's 1970-84

OEM Reference #
• 98980-06020-00

Gasket - Rear of Advance or Breaker Housing - Fits: All XS650's 1970-84 - 2 used on each engine. OEM Ref.# 256-11146-00 XS1 XS2 TX650 XS650

OEM Reference #
• 256-11146-00

Camshaft Seals (Pk./2) Special triple lip camshaft Oil Seals. - Made in Japan Fits: All 650's 1970-84

OEM Reference #
• 93101-25044
• 93102-25090

Engine Valve Shim Kit. 29mm diameter.

Contains 20 pieces: 2 Each 2.3/2.4/2.5/2.55/2.6/2.7/2.8/2.9/3.0/3.1

Fits: XS750 D/2D/F 1977-79, XS750 SE/SF 1978-79, XS850 G/H 1980-81, XS850 LG/SG/SH 1980-81, XJ900 RK 82, XJ900 83-85, XJ1100 J 82, XS1100 E/F/G/H 1978-81, XS1100 LG/LH 1980-81, XS1100 SF/SG/SH 1979-81, XS400 J/K 1982-83, XS400 RJ/RK 82-83, XJ550 81-83, FJ600 L/N 84-85, FZ600 86-88, XJ600 84, XJ650 G/H/K 80-83, XJ650 LH 81, XJ650 RJ 82, XJ650 83, XJ650 LJ/LK 82-83XJ750 J/K 82-83, XJ750 MK 83, XJ750 RH/RJ/RK 81-83

Camshaft Plug Set. Fits: XS750 F/SF/SE/LG/SE/E 1978-80, XS850 G/LG 1980, XS850 1981, XS1100 LH Midnight Special 1981, XS1100 S F/G/H 1979-81, XS1100 1980, XS1100 Maxim 1982, XS400 R (J/K) SECA 1982-83, XS400 J/K Maxim 1982/83, XJ650 80-82.

OEM Reference #
• 1J7/2G2-11138-00