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CONTACT US at

jeffsnure@gmail.com

330-345-1406

ship cylinders to:

Snure Interlocking

3746 Hutton Rd

Smithville, OH 44677

 

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 25/64 inch bit. Drill to a depth of 2.000" minimum and 2.200" max. 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. Tap drill for this type of tap is 25/64, can be done with 3/8" but use plenty of Tap Magic for Aluminum tapping fluid.

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”

You must use a drop or two of oil on the top threads and the between the washer and the nut!

You must use a torque wrench!

Factory torque is 32 Ft-Lbs

With these studs and oiled nuts torquing to 35-40 for up to 87mm bore should be fine, and 40 to 45 for 89mm bores.

 

 

Stock vs. Heavy duty

If installed correctly original acorn head nuts will work just fine.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clutch Note:
I have seen a lot of clutch problems develop once
performance work is
done to this engine. The 8 plate clutch setup has 15% more friction area than stock and additional
spring pressure.

Critical Note:
I have seen several clutch basket backing plates break sending hardened
steel pieces thru the engine , doing considerable damage. I now replace my clutch
basket with a new one once per season on the 400EX.

Quote of Lazarus Sommers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WE KEEP YOU ROLLIN'!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRX400EX

TRX400EX HEAVY DUTY HEAD STUDS

Fix your weak stock threads with these heavy duty head studs. Note: will not work with helicoiled or other thread insert repairs! Can be over torqued some for big bores. Made of 4140 alloy steel are more then strong enough. Reduced upper section allows for easy install and no head drilling, just cylinder drilling and tapping. Works with all the original hardware.

GT Head Studs in stock ready to ship.

see side bar note at left..............................#01-001...........$59.95

Best if installed by a machine shop.

Call Snure Interlocking for stud installs, bores, sleeve jobs, crank rebuilds, case repairs and more............See Machine Shop page ...........330-345-1406....................................................................

 

Honda Head Stud Acorn Nut

90210-HA0-000

4 Required per Head

$5.42 each

 

Honda Front Head 10mm Washer (larger)

90453-KAS-900 $4.65

one required

Cylinder Alignment Sleeves(Dowel pins) 12x20m

94310-12200 $1.38

4 Required

 

Honda 10mm Flange Nut

94050-10080 $1.05 each

 

Honda Head 10mm Washer (smaller, sides & rear)

90453-KCY-670 $3.35

3 required

10mm Hardened Washers

 

Valve Cover Bolts in Stock

m6x35 90004-GHB-700 $3.42 m6x40 90004-GHB-710 $3.42 m6x65 90004-GHB-760 $4.45 m6x118 90084-KCY-670 $7.69 m8x70 95701-08070-00 $1.65

Valve Cover Bolts

 

Honda Cylinder Base Gasket

12191-KCY-671 $9.24

 

Honda Cylinder Bolt 10mm Hardened Washer

90410-KR0-000 $2.11

4 Required

Other Parts in Stock, Just Ask

Thank You

jeffsnure@gmail.com

Snure Interlocking 330-345-1406

 

Roll Thread Forming Tap & Drill Set - 7/16-14 for TRX400EX Head Stud Installation - Yields stronger threaded hole by compressing the aluminum into the new thread size.

 

$45.95

 

 

 

 

Regular Cutting Tap & Drill Set - 7/16-14 for TRX400EX Head Stud Installation - conventional way of threading a hole, cuts material away to form the thread.

 

$36.95

 

 

 

 

 

TRX400EX 89mm Head Gasket

This is a custom made head gasket. It is .015 thicker then stock to help lessen detonation related problems. It is a 3 piece stainless head gasket. It has an 89mm bore making it great for the 440 kits........#01-002......$44.95

 

TRX400EX Cometic Top End Gasket sets......head gasket, base gasket, valve cover gasket, tensioner gasket (all crimped metal, head is multi layer .030")

C7825.......86mm bore......$39.95

C7924.......87mm bore......$39.95

C7826.......89mm bore......$39.95

Cometic top end gasket sets
 

 

400EX High Rev CDI....................................01-003...............$160.00

Shifts the rev limit up 1500 RPM, aggressive timing curve, great for MX and XC racing,............... Corey says "I like that I'm not hitting the rev limiter all the time like before."

 

 

400EX HEAVY DUTY TIMING CHAIN

Part Number..........................01-004.....................................$54.95

This heavy duty timing chain is for the Honda TRX 400ex. It is wider than the stock chain and Quality made.

 

 

 

TRX400EX 8 Plate Clutch Kit

This 8 plate clutch kit is for High HP Engines, and will give you 60% more torque before slipping. This clutch kit for the 400EX includes 8 new clutch fibres, 7 new clutch
steels, a new set of heavy duty clutch springs, a new inner pressure plate
that has been machined to provide clearance for the extra plates, and a
new side cover gasket.
See left for 8 Plate clutch notes

TRX400EX 8 Plate Clutch Kit..........................04-004.......$279.95

 

Honda Foot Pegs......wider, more comforable to stand on, excellent grip, built in end kick up, zinc plated for rust resistance....04-201.......$95.00

 

TRX400EX steel rear skid plate......................#04-135...........$59.95

 

 

TRX400EX Belly Skid..........................................GT-HBS..........$30.00

Protect your frame while gliding over rocks and other obstacles, no stickage like aluminum but just as strong and lighter then both aluminum and steel, Use with frame mounting kit below or make your own.

 

TRX400EX Belly Skid Mounting kit....................04-204..........$35.00

This video shows installation on a TRX450R but the process for the TRX400EX is similair .........................................belly skid mount 4pcs - install video here - https://www.youtube.com/watch?v=49cRh5AW99I

 

 

Belly Skid & Rotor Guard Mounting Hardware

Hose Clamps

Vinyl coated Galvanized Steel strap clamps

for 1" od x 3/4" wide $1.50 #01-900

for 1-1/4"od x 1/2" wide $1.25 #01-901

Stainless Steel Strap with Rubber Cushion

for 1-1/4" od x 1/2" wide $2.25 #01-911

Hose Clamps

 

Flat Head Bolts

Black Oxide M6x30.#01-102.$0.65 M8x30.#01-122.$0.75 M8x35.#01-123.$0.85

Black Oxide Flat Head Bolts

Zinc Plated......... M6x25.#01-141.$.065 M8x25.#01-131.$0.85

Zinc Plated Flat Head Bolts

Stainless Steel M6x30.#01-112.$1.00

 

 

GT A-Arm Bushing and Collar set

#05-004........$125.00

 

GT A-Arm Collar set

#05-005.......$64.95

 

GT A-Arm PolyUrethane Bushing set 16pcs

#05-006.........$59.95

 

TRX400EX GT Link Bearing Renew Kit

#04-003.........$59.95

 

 

Bushing Reamer

#05-007......$85.00

Use reamer after bushing install to size bore for pivot sleeve slip fit

 

GT A-Arm Ball Joints

Upper..#05-008..$39.95

Lower..#05-009..$39.95

Both...#05-010...$75.95

GT A-Arm Ball Joints

 

Ball joint adaptor kit only, no ball joints. 6 pieces..2 lower adaptors, 4 shouldered nuts.....05-014 $40

 

Stock A-Arm Ball Joints

This kit repairs stock A-arms with replaceable ball joints, comes with parts to align joints, some welding required

Upper..#05-011.....$44.95

Lower..#05-012.....$59.95

All 4.....#05-013....$199.95

 

Stock A-arm ball joint replacement installation video, lower https://www.youtube.com/watch?v=nCwXc4vH9GY

Stock A-arm ball joint replacement installation video, Upper https://www.youtube.com/watch?v=JZuJxJlK9Vc

 

 

Exhaust Hardware

Honda Exhaust Tall Flange Nuts 8mm

90301-HM8-000 $2.09

(4) required

 

Honda Exhaust Stud 8x22

92900-08022-0B $1.22

(4) required

 

Exhaust Gasket

$1.99

(2) Required

 

 

 

GT THUNDER TRX400EX EXHAUST

After i get product caught up, i think i will build a few TRX400EX GT full race exhaust ....... if interested email me...........400EX EXHAUST