1. Parts

1978 Yamaha YZ400 Parts

1978 Yamaha YZ400
Front Tire:
3.00-21
Rear Tire:
4.50-18
Spark Plug:
B8ES
Stock Chain/Belt:
520x108
Front Sprocket:
14T
Rear Sprocket:
50T
Select Your Ride: Go

Top Selling Parts for your 1978 Yamaha YZ400

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Shinko
244 Dual Sport Front - Rear Tire
$23.99 - $60.99
You save up to $24.96 (29%)
  • Blackwall
(199)
Video
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Shinko 244 Dual Sport Front - Rear Tire Balancing a 50/50 mix of street and dirt, the Shinko Dual Sport 244 Series delivers unmatched performance and value in a tire that tackles the widest range o...
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Michelin
Ultra Heavy-Duty Inner Tube
$22.99 - $27.99
You save up to $2.96 (9%)
  • Black
(39)
Michelin Ultra Heavy-Duty Inner Tube Reinforced tubes for off-road applications Feature a 4mm wall thickness Provide enhanced protection against punctures and pinch flats TR4 stem type Sizing: 1...
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Pro Taper
Tri-Density Full-Diamond MX Grip
$13.99
You save $0.96 (6%)
(0)
Pro Taper Tri-Density Full-Diamond MX Grip The Tri-Density grip delivers the perfect compromise between a super tacky feel, durability and comfort. The first compound makes this grip ultra-tacky,...
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DID
520VX2 X-Ring Chain
$67.99 - $124.99
You save up to $31.00 (19%)
  • Gold/Steel
  • Natural
(20)
DID 520VX2 X-Ring ChainGreater rigidity Greater rigidity brings smoother handling, reduced power loss, quicker response Highest value in all D.I.D series Superior longer life than previous D.I.D...
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JT
520 Steel Rear Sprocket
$16.99 - $45.99
You save up to $5.00 (9%)
  • Steel
(65)
JT 520 Steel Rear Sprocket Dirt or street, the JT 520 Steel Rear Sprocket handles the power and lasts far longer than aluminum thanks to the 545C high carbon steel construction. JT Sprockets are m...
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Pro Taper SE Series 7/8" Standard HandlebarsThe SE bar is Pro Taper's 7/8th inch diameter handlebar designed for riders who still prefer the feel and stability of a cross bar. Transworld Motocross ...
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Acerbis
Rally Pro X-Strong Handguards
$83.99
You save $20.96 (19%)
(74)
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Acerbis Rally Pro X-Strong HandguardsRace proven in everything from tight woods to high speed desert, the Acerbis Rally Pro X-Strong handguards are battle hardened to provide the strength and tough...
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Renthal
520 R3-2 O-Ring Chain
$94.46 - $107.96
You save up to $11.99 (9%)
  • Black
(11)
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VIDEO     
Renthal 520 R3-2 O-Ring Chain Renthal's race ready O-ring chain, the 520 R3-2 mixes in the long life advantage of an O-Ring chain and combines it with the lightness of a standard roller chain. From...
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Wiseco
Pro Lite Piston Kit
$72.99 - $189.99
You save up to $50.01 (20%)
(13)
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Wiseco Pro Lite Piston Kit Available for both two stroke and four stroke bikes, the Wiseco Pro Lite Piston Kit is both a great OEM alternative and an easy way to boost the power. Choose stock bore ...
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JT
520 Front Countershaft Sprocket
$8.99 - $38.99
You save up to $4.00 (9%)
  • Steel
(64)
JT 520 Front Countershaft SprocketMade exclusively from the finest grade of C49 high carbon steel, JT Countershaft Sprockets are made to last with a lifespan greater than any other steel or aluminu...
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Cycra
Pro-Bend CRM Racer Pack
$120.99
You save $12.96 (9%)
(47)
Cycra Pro-Bend CRM Racer Pack The gold standard in hand protection, Cycra Pro-Bend handguards are renowned for their unobtrusive design, solid mounting and bullet proof construction. Whether you ri...
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All Balls
Wheel Bearing and Seal Kit
$8.49 - $63.09
You save up to $6.93 (9%)
(29)
All Balls Wheel Bearing and Seal Kit Hands down, the most complete line of wheel bearing & seal kits All the bearings and seal required to refit a wheel in one convenient package Premium high-sp...
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Pro Taper
Pillow Top MX Grips
$11.66
You save $1.29 (9%)
(87)
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Pro Taper Pillow Top MX GripsGiving relief to hands and riders alike across the country, the Pro Taper Pillow Top MX Grips reduce the effects of vibration and jarring and let you ride the roughest ...
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EBC
Brake Shoes
$15.00 - $63.65
You save up to $3.35 (5%)
(19)
EBC Brake Shoes Replacement brake shoes from EBC Maximum performance and durability**Notes: Fits BMW R80 up to 09/80 04-09 Yamaha Vino 125 fits rear only SYM Symba fits front only Kawasaki Mule 61...
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Renthal
Standard 7/8" Handlebars
$71.99
You save $7.96 (9%)
(28)
Video
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Renthal Standard 7/8" Handlebars Renthal 7/8 handlebars re-wrote history when they became the first aftermarket aluminium handlebar to be fitted as OEM on a Japanese motorcycle. All Honda CR/CRF...
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Pro Taper
EVO 1-1/8" Oversized Handlebars
$80.99
You save $9.00 (10%)
  • Black
  • Magnesium
(26)
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VIDEO     
Pro Taper EVO 1-1/8" Oversized Handlebars The EVO bar is Pro Taper's top of the line bar without a crossbar. Oversize diameter handlebars, without cross bars, were invented, and patented, by Pro Ta...
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Pro Taper
520XRC X-Ring Chain
$89.99
You save $9.96 (9%)
  • Gold
(3)
Video
VIDEO     
Pro Taper 520XRC Chain Premium gold series x-ring chain The 520XRC uses proprietary x-ring technology that was tested exclusively to handle the extreme temperatures and conditions of off-road ri...
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Moose Racing Contour Handguards Just as the name suggests, these Moose Racing Handguards use a contoured shape to provide more space for your hands and controls. Constructed from 6061 T-6 aluminum,...
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Renthal
520 R1 Works Chain
$82.76 - $86.36
You save up to $9.59 (9%)
  • Gold
(11)
Video
VIDEO     
Renthal 520 R1 Works Non O-Ring Chain A premium high strength 520 chain with excellent impact load resistance, designed specifically to withstand the stress found in off road applications. This ch...
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Acerbis
Multi Concept X-Pro Handguards
$79.99
You save $19.96 (19%)
  • Black
  • White
(8)
Video
VIDEO     
Acerbis Multi Concept X-Pro Handguards Added a layer of protection for your hands to the bars of your dirt bike with these new handguards from Acerbis. The Multi Concept X-Pro Handguards offer a u...
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Sunstar
520 Steel Rear Sprocket
$28.99 - $44.99
You save up to $4.96 (9%)
  • Steel
(18)
Sunstar 520 Steel Rear Sprocket Constructed of the highest-quality 1045 high-carbon steel Exclusive heat treatment and quenching process for strength and durability The strongest, longest-lasting ...
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Pro Taper
Universal Bar Mount Kit
$35.99
You save $4.00 (10%)
  • Black
(26)
Pro-Taper Universal Bar Mount Kit Adapts solid mounted triple clamp bar mounts from 7/8" to 1 1/8" Precision CNC machined aircraft grade aluminum Adds ¾" to rise of handlebars Pad not included ...
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