1. Parts

1978 Yamaha YZ400

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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DID 520VX2 X-Ring Chain
DID
520VX2 X-Ring Chain
$67.99 - $82.99
You save up to $17.00 (20%)
  • Natural
(23)
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...
EBC Brake Shoes
EBC
Brake Shoes
$14.99 - $63.99
You save $1.96 (4%)
(19)
EBC Brake Shoes These EBC Brake Shoes are an excellent choice for replacing OEM brake shoes. EBC Brake Shoes give you the durability you want and the performance you need. These brake shoes also me...
Sunstar 520 Steel Rear Sprocket
Sunstar
520 Steel Rear Sprocket
$34.99 - $44.99
You save $2.96 (8%)
  • Steel
(19)
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 ...
Renthal Twinwall 1-1/8" Oversized Handlebars
Renthal
Twinwall 1-1/8" Oversized Handlebars
$107.99
You save $11.96 (10%)
  • Blue
(12)
Renthal 1-1/8" Oversized Handlebars Renthal’s revolutionary handlebar is a large diameter, 1 1/8” (28.6mm) handlebar which utilises two tubes, one within the other, borrowing prin...
Renthal Fatbar 1-1/8" Oversized Handlebars
Renthal
Fatbar 1-1/8" Oversized Handlebars
$80.99
You save $8.96 (10%)
  • Black
  • Blue
(17)
Video
VIDEO     
Renthal Fatbar 1-1/8" Oversized Handlebars The Renthal Fatbar® features a tapered outer wall resulting in a 1 1/8" clamping diameter and 7/8" diameter at the control ends.This profiled wall and br...
Factory Effex Universal All-Grip Seat Cover
Factory Effex
Universal All-Grip Seat Cover
$33.99
You save $5.96 (15%)
  • Yellow
(8)
Factory Effex Universal All-Grip Seat Cover Especially with older bikes it can be hard to find a replacement seat cover. The Factory Effex Universal All-Grip Seat Cover with just a few cuts can be ...
BikeMaster Fork Oil Seals
BikeMaster
Fork Oil Seals
$6.99 - $51.99
You save
  • Black
(24)
Bikemaster Fork Oil Seals Keep your ride rolling smooth, and safe by replacing worn out or damaged fork seals. Bikemaster's Fork Oil Seals keeps your forks stanchions lubricated with fork oil so ...
EBC Sintered Brake Shoes
EBC
Sintered Brake Shoes
$17.99 - $64.99
You save up to $2.01 (4%)
(9)
EBC Sintered Brake Shoes When it comes to brake shoe replacement, EBC is an industry leader. EBC Sintered Brake Shoes will provide the performance you want under a variety of environmental conditio...
RK 520 XSO X-Ring Chain
RK
520 XSO X-Ring Chain
$98.96
  • Natural
(1)
Video
VIDEO     
RK 520 XSO X-Ring ChainPro X-ring chain lasts five to eight times longer than standard chain Provides two more lubricant pools than conventional O-rings for longer life Lubricated with specially fo...
Acerbis Tri-Fit Handguards
Acerbis
Tri-Fit Handguards
$79.99
You save $19.96 (20%)
  • Orange
(3)
Video
VIDEO     
Acerbis Tri-Fit Handguards The new Tri-Fit handguard is a perfect fit for almost any application! Made of Nylon, this innovative, multi-functional handguard kit allows 3 different configurations 1....
MSR D-Flectors Aluminum Handguards
MSR
D-Flectors Aluminum Handguards
$54.99
You save $23.00 (29%)
  • Black
(11)
MSR Racing D-Flectors Aluminum HandguardsHigh-strength aluminum design to protect your hands from trees and other elements Top-quality metric hardware included Available for 7/8" standard handleba...
MSR Dual Sport Mirror
MSR
Dual Sport Mirror
$13.95
You save $5.04 (27%)
  • Black
(30)
MSR Racing Dual Sport Mirror Tough high-impact nylon material Mounting hardware included Clamps directly to handlebars Mirrors pivot down when you hit the trail *Note: Clamp is ...
Renthal Supercross Bar Pad
Renthal
Supercross Bar Pad
$17.99
You save $1.96 (10%)
  • Orange
(8)
Renthal Supercross Bar PadThe Renthal Supercross Bar Pad carries the name used and recognized by Champions The pads are made from high-density, light-weight foam to reduce rider injury and are cov...
RK 520 GXW XW-Ring Chain
RK
520 GXW XW-Ring Chain
$143.51 - $164.95
You save
  • Gold
(4)
Video
VIDEO     
RK 520 GXW XW-Ring Chain RK racing chains have been the overwhelming choice of World Championship Teams for the past two decades. They have benefited from their long-term OEM relationships with the...
Pro Grip Detailing Tape
Pro Grip
Detailing Tape
$13.99
You save $1.50 (10%)
(71)
Pro Grip Detailing Tape Want to stand out? This detailing tape does the trick quickly and easily. Regardless of rim size, the Pro Grip Detailing Tape works with the color options to pick from as we...
EK 520MVXZ Chain
EK
520MVXZ Chain
$134.10 - $152.95
You save up to $14.89 (10%)
(6)
EK 520MVXZ Chain EK's MVXZ Quadra-X Ring chain is the ideal O.E. replacement chain for any 600 to 1000cc street bike Features like lightening holes in the sideplates, large diameter pins, and...
Cycra Pro Bend Composite Bar Pack
Cycra
Pro Bend Composite Bar Pack
$44.99
You save $4.96 (10%)
  • Black
  • Blue
(0)
Cycra Pro Bend Composite Bar Pack Includes: Composite Pro Bend wraparound shields Powergrip bar ends Pro Bend abrasion guards *Note: Mounts sold separately.
Factory Effex FX 6" Factory Numbers
Factory Effex
FX 6" Factory Numbers
$5.99
You save $0.96 (14%)
  • White
(8)
Factory Effex FX 6" Factory NumbersThe Best fitting, highest quality numbers made Black slit and cut from 12 mil. high gloss binyl Strong adhesive, won't blow off by a pressure washer Secret adhe...
RK 520 RK-M Standard Chain
RK
520 RK-M Standard Chain
$23.68 - $36.67
  • Black
(2)
Video
VIDEO     
RK 520 RK-M Standard Chain All chains are made with Japanese steel and meet all Japanese specs Quality at an economical price Suitable for 250cc streetbikes only. Not recommended for dirt applicat...
Keiti Reflective Wheel Tape
Keiti
Reflective Wheel Tape
$14.99
You save $1.00 (6%)
(10)
Keiti Reflective Wheel Tape Contents include 1 wheel tape with applicator Adds style and functionality  to your O.E.M. or aftermarket sport bike wheels for a fraction of the cost for a new paint ...