Critical Note:
400EX Head studs will pull the threads loose in the cylinder anytime
that the cylinder gets too hot breaking down the aluminum. There are
several causes of this including overheating of the cylinder during
resleaving and poor matching of fuel octane to the engine.
Critical Note:
These heavy duty studs cannot be used if the cylinder was drilled and
tapped for Helicoils or drilled and tapped for any other oversize studs
with a differant thread diameter and pitch.
Installation
Instructions
You
need to first drill and tap the cylinder to accept the new studs.
Hole
machining
7/16-14 course thread. Drill holes with a 3/8 inch bit. Drill to a depth of 2.200". It is always best to have a
machine shop do this procedure in a vertical mill to ensure proper
alignment.
For best results, use a roll form tap.
Be
sure to hone cylinder after tapping the holes but before studs are installed.
Install
the new studs using Permatex sleeve retainer on the threads.
Be
sure to install to the correct height.
The
studs must be the correct distance out of the top of the cylinder.
Front
– 2.436”
Rear
– 3.188”
Sides
– 1.929”
Stock vs. Heavy duty
 |
400EX
400EX Exhaust
400EX Heavy Duty Head
studs............................#01-001....................$59.95
MORE HEAD STUD INFO
400EX CDI... 1500 RPM Higher rev limit, aggressive timing curve, great for XC and MX racing...........................#01-003.......$150.00
See Snure Interlocking and other Authorized Dealers near you
400EX Front Shocks
MORE INFO
See Maul Tech ATV for GTS Shocks and Service
BNR Motorsports for Suspension Service and Parts
400EX XC
Link..................................#04-001...........$175.00
MORE XC LINK INFO
See Hess Motorsports and other Authorized Dealers near you
400EX
MX Link................................#04-002............$175.00
MORE MX LINK INFO
400EX Link Bearing Kit Renew Kit.......#04-003.......$59.95
See Snure Interlocking and other Authorized Dealers near you
400EX Swingarm Skid
Plate.........................#04-135.......$59.95
MORE INFO
400EX Belly Skid Blank (no hardware)..........#GT-HBS.........$25.00
400EX Heavy Duty Timing Chain........#01-004............$89.95
MORE INFO
400EX 8 Plate Clutch
Kit....................04-004..................$279.95
See Snure Interlocking and other Authorized Dealers near you
MORE
INFO
400EX XC A
arms...........04-102...............$895.00
Quad Kinetix LLC

Honda Lower Ball Joint.....#07-007....$39.95
See Snyder Motorsports and other Authorized Dealers near you |

Honda Upper Ball Joint...#07-006....$39.95
See Snyder Motorsports and other Authorized Dealers near you |

Honda G T Thunder Bushing kit...#05-004...$125.00
See Snure Interlocking and other Authorized Dealers near you |
400EX Upper Adjustable Replacement A arm

#04-005...$174.95
Quad Kinetix LLC |
Chassis Skid Blank

GT-HBS.......$25.00
See Snure Interlocking and other Authorized Dealers near you
|
400EX Race Exhaust

More Info
Raw...04-EXEX.......$450.00
Chrome..04-EXEXC...$750.00
See Snure Interlocking and other Authorized Dealers near you
|
400EX Heavy Duty Valve Springs

#04-3111.....$119.95
|
Foot Pegs

#05-201.......$99.95
See Snure Interlocking and other Authorized Dealers near you
|
Chassis Skid Mounts

04-204......$35.00
See Snure Interlocking and other Authorized Dealers near you |
Heavy Duty Head Studs

#01-001.........$59.95
See Snure Interlocking and other Authorized Dealers near you
|
Install TRX450R FT Shocks on your TRX400EX
TRX400EX FT Shock tips
See BNR Motorsports |
400EX Link Bearing Renew Kit

#04-003.......$59.95
See Snure Interlocking and other Authorized Dealers near you |
Chassis skid blanks (poly) - no hardware...................................$25.00
See Snure Interlocking and other Authorized Dealers near you
Rear Shock Conversion: Includes revalve, respring, and a link........$345.00
Do It Yourself Kit: High flow piston, shims, rear link, and a new rear spring.....$445.00
TRX400EX Heavy Duty Head Studs
Part Number
01-001..............................................................$59.95
These head studs are for repairing the 400EX cylinder after
the thread in the cylinder are damaged or can be installed in a new
cylinder to help prevent head gaskets failing as quickly. They have
shown to have over 70% more holding strength then the stock head studs
due to the increased diameter and the longer threaded area on the studs.
They can be installed with the cylinder on the quad but we prefer
to machine the cylinder for the new studs on a mill for better accuracy.
400EX Heavy Duty Stud Kit............
#01-001.....................................- $59.95
Stud Installation - $55.00
HOW TO BUY THEM
See Snure Interlocking and other Authorized Dealers near you
Online at www.p4quads.com
or call Snure Interlocking ....330-345-1406
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