2006–2011 Triumph Daytona 675 Service Manual (P/N T3880105-T0301)

This 427-page PDF contains Triumph factory service information for the Daytona 675 configuration documented in the manual: the 674.8 cc transverse inline-three with a 12-valve DOHC head, cable-operated wet multiplate clutch, six-speed constant-mesh transmission, sequential fuel injection, and twin-spar aluminum chassis. Triumph states that the manual is designed primarily for trained technicians in a properly equipped workshop; experienced owners can use it for basic maintenance and repair only when they have suitable mechanical knowledge plus the required hand tools and special service tools.

• Cylinder head and valve train: Covers cam cover service, camshaft and bearing-cap inspection, valve-clearance measurement and adjustment, cam-chain removal and installation, cylinder-head inspection, valve and stem-seal work, and final timing checks.
• Bottom end and drivetrain: Documents crankcase separation and assembly, piston and liner service, connecting-rod and crankshaft bearing selection, balancer timing, clutch repair, transmission-shaft teardown, selector and sprag-clutch work, and drive-chain replacement.
• Fuel system and engine management: Includes Triumph diagnostic-tool workflows, DTC and freeze-frame data, function tests, ECM tune and unlock operations, throttle balancing, adaptation checks, and pinpoint testing for the injection, ignition, sensor, fuel-pump, EXBV, and intake-flap circuits.
• Lubrication and cooling: Details the engine oil circuit, pressure checks, oil pump, sump, heat exchanger, low-pressure switch, coolant replacement, radiator and fan, pressure cap, thermostat, and water-pump procedures.
• Suspension, brakes, and wheels: Addresses fork-oil service and fork overhaul, headstock bearings, steering damper, rear suspension and swingarm work, brake bleeding, caliper and master-cylinder overhaul, discs, pads, wheel bearings, and final drive.
• Electrical and reference material: Provides battery, starter, alternator, relay, fuse, and lighting procedures, along with wiring and routing drawings, torque tables, capacities, clearances, pressure-test data, wear limits, and electrical test specifications.

Repair Data Beyond Routine Maintenance

The scheduled-maintenance chart is only the starting point. Engine repair sections pair removal and assembly procedures with the measurements used to decide whether parts can be reused. Coverage includes camshaft journal checks with Plastigage, valve-clearance records and shim selection, valve and guide inspection, piston and cylinder wear checks, and color-coded connecting-rod and crankshaft main-bearing selection. The manual also states that the valve seats and guides are not separately replaceable; the cylinder head is renewed when guide wear exceeds its service limit. Component-specific tightening sequences are provided for the camshaft ladder, cylinder head, crankcases, connecting rods, and engine mounts.

Factory Diagnostics and Adjustments

The engine-management chapter explains the on-board fault-detection system and use of the T3880250 Engine Management Diagnostics tool. It covers reading and clearing trouble codes, viewing current and freeze-frame data, running actuator function tests, checking build data, balancing the throttle bodies, resetting adaptations, adjusting the exhaust butterfly valve, updating tunes, and unlocking the ECM. Tune-download and ECM-unlock procedures assume access to the factory diagnostic tool and Triumph-supplied software or passwords; the PDF does not replace those external resources.

Diagrams, Routing Views, and Special Tools

The manual contains 49 titled exploded views. Particularly useful examples of its broader visual coverage include the Exploded View - Camshaft and Camshaft Drive, Engine Oil Circuit, Circuit Diagram - Engine Management System - Daytona 675, Main Wiring Harness Routing, Fork Oil Level Chart, and Circuit Diagram - Complete System. Separate routing drawings cover the clutch and throttle cables, rear-light harness, front and rear brake hoses, fuel-tank breather hoses, and intake-air-flap vacuum hose.

The manual also identifies the service equipment required for operations that cannot be completed safely with improvised tools. Examples include the T3880105-T0301 angular torque gauge, T3880315 cylinder-liner extractor with T3880101 adapter, T3880106 balancer-gear holder, T3880026 universal clutch-holding tool, 3880160-T0301 fork filler/evacuator, and T3880027 chain-link tool kit.

Scope Limits and Repair Cautions

California evaporative-emissions equipment receives its own component, hose-routing, operating, and service coverage. The rear suspension unit section is limited to removal, external inspection, and installation; it does not provide an internal shock rebuild.

Several warnings address easy-to-miss assembly traps. The upper and lower crankcases are a machined matched set, and incorrect separation or screw sequencing can permanently damage them. The manual also warns that incorrect selector-fork orientation can damage the gearbox and that turning the crankshaft with the cam chain or camshafts incorrectly positioned can cause valve-to-piston contact and severe engine damage.

Fuel-system, brake, cooling-system, engine, and chassis repair can involve fire, scalding, loss-of-control, and component-damage hazards. Follow the Triumph procedures and warnings, use calibrated measuring equipment and the specified service tools, and have safety-critical work checked or performed by a qualified motorcycle technician.