Engine Casing Cover Bolt Kit for Triumph Trident 660

This model-specific kit supplies 56x stainless steel engine casing cover bolts for the listed original mounting positions on the Triumph Trident 660 2025. The pack includes clutch cover bolts, alternator cover bolts and the other casing and sump fixings allocated in the contents table.

Browse the Triumph Trident 660 2025 fastener range.

Model and kit summary

Motorcycle	Triumph Trident 660
Model years	2025
Supplied bolts	56x stainless steel replacement bolts
Also included	1x Biker Bling anti-seize compound pack (7 g)

What you receive

• 56x stainless steel engine casing cover bolts, allocated by fitting location below.
• 1x Biker Bling anti-seize compound pack (7 g).

Fitting position / component	Supplied quantity	Original Triumph fixing reference	Diagram item
Right clutch casing	10x	T3205067	(2)
Right crank and balancer covers	2x	T3205067	(2)
Right crank and balancer covers	10x	T3205066	(26)
Left alternator casing	11x	T3205067	(2)
Left sprocket cover — supplied allocation	3x	T3205067	(2)
Top breather cover	6x	T3205067	(2)
Sump / oil pan	14x	T3202303	(4)
Total bolts supplied	56x	Allocated to the positions above

The Triumph references identify the original fixings being replaced, rather than Biker Bling product codes. These are aftermarket stainless steel replacements; genuine Triumph-branded bolts are not supplied. The table defines the supplied kit allocation, rather than every fixing appearing in the factory diagrams.

Important fitment notes

• Compatibility: For Triumph Trident 660 2025, with the matching original cover arrangement and listed fixing specifications.
• Check before fitting: Match the exact model, original references and cover mounting positions. Aftermarket covers and modified engines may require different hardware.
• Sprocket-cover revisions: This kit supplies 3x bolts in the sprocket-cover group. Original cover revisions can have different fixing counts. Match the bolts to the mounting holes present on your cover; a bolt left over from the supplied allocation must not be fitted at an unrelated position.
• Defined contents: Casings, covers, gaskets, seals, locating dowels, drain plugs and internal engine fasteners are not included. Only the cover groups listed above are supplied.
• Photographs: Hardware photographs may be generic. Use the contents table for the supplied quantities and locations.

Model-specific engine cover replacements

The Trident 660 kit groups replacement bolts for the clutch, crank and balancer covers, alternator casing, sprocket cover, top breather cover and sump. Keep each location’s allocation separate during installation; bolts sharing a thread are not automatically interchangeable between covers.

Materials and appearance: The replacement bolts are stainless steel. Their head appearance may differ from Triumph’s originals. Stainless steel describes the material and does not by itself establish equivalent mechanical strength.

When should you replace engine casing bolts?

• Damaged heads or threads: Inspect worn bolts and the casing threads before selecting replacements.
• Missing hardware: Identify the original fixing and its location before ordering.
• Cover servicing: Check the bolts, sealing faces and supporting components whenever a cover is removed.

Replacement bolts cannot repair cracked casings, stripped threads or distorted covers. Identify the cause of looseness or leakage before reassembly.

Fitting information

• Preparation: Work on a securely supported, cool motorcycle and follow Triumph’s workshop procedure for the exact cover.
• Correct positions: Match each bolt to its original location and start it by hand. Do not pull a misaligned cover into place with a bolt.
• Sealing arrangements: Retain the required locating arrangements. Renew disturbed gaskets and seals where specified.
• Tightening and thread condition: Follow the specified tightening order, torque and thread condition. The included anti-seize pack is not an instruction to lubricate every fixing.
• Fluid checks: Follow the required draining, refilling and leak-check procedures for disturbed fluid-containing covers. Have uncertain work completed or checked by a qualified motorcycle technician.

For general background, read our motorcycle bolt strength grades guide. Triumph’s workshop procedure takes precedence.

Customer questions

How many bolts are supplied?

The kit contains 56x stainless steel bolts allocated to the listed covers and sump, plus 1x Biker Bling anti-seize compound pack (7 g). Quantities are shown for each fitting location above.

Are dowels, gaskets and the drain plug included?

No. The kit supplies the listed replacement bolts and anti-seize pack. Covers, locating dowels, gaskets, seals and drain plugs are not included.

Does every cover revision use the same number of sprocket-cover bolts?

No. The kit retains a 3x supplied sprocket-cover allocation. Use only the bolts required by the original cover fitted to your motorcycle; do not install an additional bolt elsewhere simply because it remains in the pack.