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Triumph:
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Rocket III (2004-2018)
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765 R/RS [4] (2017-2024)
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Motorcycle engine repair Triumph Street Triple 765 R/RS (2017-2024)

  • Main
  • Triumph
  • Street Triple
  • 765 R/RS [4]
  • Engine and systems
  • Engine repair
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Engine covers — exploded view
Exploded view – sump Exploded view – clutch cover Exploded view – alternator cover Exploded view – camshaft cover Exploded view – front sprocket and breather covers
Sump — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Sump — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. 1. If removed,...
Camshaft cover — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Camshaft cover — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. 1. Refit the...
Engine breather cover — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Engine breather cover — installation
1. Fit a new engine breather cover seal to the crankcase. 2. Fit the engine breather cover, ensuring that the gasket remains in the correct position. 3. Position the purge valve bracket and harness brackets to the engine breather cover as noted...
Clutch cover — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Clutch cover — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Note: The...
Alternator cover — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Warning! The...
Alternator cover — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. 1. Apply...
Front sprocket cover — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Warning!...
Front sprocket cover — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Warning!...
Crankcase right hand cover — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Warning! If...
Crankcase right hand cover — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. 1. Fit a new...
Cylinder head — exploded view
Exploded view - camshaft, camshaft drive and valves
Cylinder head description
The engine is fitted with an aluminium alloy cylinder head, which carries the camshafts, valves and spark plugs. The cylinder head is cast as a single entity and various components are permanently added after machining. The camshafts run directly in...
Camshaft drive chain tensioner — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Camshaft drive chain tensioner — installation
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. 1. Check that...
Camshaft drive chain tensioner blade — disassembly
Note: For the purpose of this instruction, the top of the tensioner blade is where the pad is located. 1. Release the clips and remove the pad. 1. Pad; 2. Clip (one side shown) 2. Detach the top hook from the tensioner blade. 1. Top hook; 2....
Camshaft drive chain tensioner blade — assembly
Note: For the purpose of this instruction, the top of the tensioner blade is where the pad is located. 1. Align the three hooks and fit the facing blade. 1. Hooks 2. Align the three side locating devices. 1. Locating devices; 2. Facing blade 3....
Camshaft — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Camshaft and sprocket identification
Note: The inlet and exhaust camshafts are different. They can be identified by a raised feature in the centre of the exhaust camshaft, which is machined off on the inlet camshaft. The camshafts can be further identified by a letter I for inlet or E...
Camshaft and bearing cap inspection
1. Inspect the camshaft sprockets for damaged and worn teeth. Replace as necessary. 2. Measure the camshaft journals with a micrometer. If any journal is outside the specified tolerance, replace the camshaft. For specifications refer to Camshafts....
Camshaft — installation and timing
Caution! The camshaft sprockets are attached to the camshafts using slotted bolt holes. This allows for very accurate valve timing and therefore improved performance and fuel economy. Never fit the camshaft sprockets without correctly setting the...
Valve clearance measurement
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Note: Valve...
Valve clearance adjustment
Note: To adjust the valve clearances the camshafts must be removed. Follow the camshaft removal procedure. 1. Remove the camshafts (see Camshaft - removal). 2. Remove the tappet bucket from the cylinder head. 3. Remove the shim from the valve head....
Camshaft drive chain — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Camshaft drive chain — inspection
Visual in-situ checks can also be made as follows: 1. Check for significant blue discolouration of the drive chain plates indicating excessive heat build-up. 2. Examine all pins for signs of rotation. 3. Check for cracking or deep scratching of the...
Camshaft drive chain — installation
1. Fit the camshaft drive chain and locate the lower end around the crankshaft gear. 2. Incorporating a new seal, refit the bolt to the centre of the camshaft drive chain housing in the cylinder head, tightening to 12 Nm. Perform the following...
Cylinder head — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Note: Removal...
Cylinder head — inspection
1. Thoroughly clean the surface of the cylinder head and check for damage and/or pitting of the combustion chambers. 2. Using a straight edge and feeler gauges, check the cylinder head face for warp, which could lead to gasket failure. Replace the...
Cylinder head — installation
1. Fit a new gasket to the barrel and refit it to the crankcase (see Barrels - installation). 2. Thoroughly clean the upper faces of the barrel, taking care not to damage the mating surfaces. 3. Fit a new cylinder head gasket ensuring that the head...
Valves and valve stem seals — removal
1. Remove each valve from the head using a valve spring compressor. The compressor must act on the valve spring retainer to allow removal of the valve collets. Valve removal 2. Once the collets are released, remove the following items: Valve spring...
Valves and valve stem seals — installation
Valve to valve guide clearance If the valve guides are worn beyond the service limit given below, the cylinder head must be replaced. Valve stem to guide clearance Inlet 0.010 - 0.040 mm Service limit 0.078 mm Exhaust 0.030 - 0.060 mm Service limit...
Barrel and pistons — exploded view
Exploded view - barrel and pistons
Barrels — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Barrels — inspection
1. Measure the diameter of each cylinder bore using an internal micrometer or similar accurate measuring equipment. Cylinder bore diameter measurement points 2. Measure the inside diameter 10 mm from the top of the bore as shown above. 3. If the...
Barrels — installation
1. Thoroughly clean the mating surfaces of the crankcase and barrels taking care not to damage the mating surfaces. Note: To ensure the piston rings do not get damaged, the piston/connecting rod assemblies must be fitted into the barrel before...
Piston — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Piston — wear check
1. Remove any carbon build-up from the piston crown. Inspect the piston crown for signs of pitting and check the piston skirt and ring grooves for signs of wear or scuffing. If any sign of damage is found, renew the piston. 2. Measure the piston...
Piston ring to groove — clearance
Note: Prior to removing the rings, check the ring-to- groove clearance of each compression ring. 1. With the piston rings correctly installed on the piston, check the ring-to-groove clearance of each compression ring, using a feeler gauge. Piston...
Piston rings — removal
Caution! Do not expand the piston rings any more than is necessary to allow them to be removed from the piston. The rings are brittle and will break if expanded too much. Note: The top and second compression rings are different and are not...
Piston ring — end gap
1. Check each piston ring end gap as follows. Note: The piston ring end gap must be measured in the cylinder bore to which the piston ring will be fitted to on installation. Ensure all piston rings are fitted in their original locations (if original...
Piston — assembly
1. Ensure the piston ring grooves are clean. Note: Ensure all piston rings are fitted in their original locations (if original rings are being reused) or to the piston/bore which the end gaps were checked (if new rings are being fitted). Caution! Do...
Crankcase, crankshaft, connecting rods and pistons
Exploded view – crankshaft and connecting rod Exploded view – crankcase
Crankcases — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Caution! The...
Crankcases — assembly
Perform the following operations: Input and output shaft assemblies - installation 1. Use high flash-point solvent to clean the crankcase mating faces. Wipe the surfaces clean with a lint-free cloth. 2. Ensure that the transmission is in neutral. 3....
Crankshaft — installation
Perform the following operations: Engine - removal Camshaft drive chain - removal Crankcases - removal Connecting rods - removal 1. Release and remove the crankshaft from the upper crankcase. Note: Identify the location of each bearing shell. Remove...
Connecting rods — removal
Perform the following operations: Engine - removal Barrels - removal Crankcases - removal 1. Mark each big end cap and connecting rod to identify both items as a matched pair and to identify the correct orientation of the bearing cap to the...
Connecting rods — installation
Note: Connecting rod bolts are treated with an anti-rust solution which must not be removed. Clean the connecting rod with high flash-point solvent. Remove all bearings and inspect for damage, wear and any signs of deterioration and replace as...
Connecting rod big end journal checking, measuring and bearing selection
Using selective bearings compensates for minor differences in crankshaft main bearing journal and crankcase dimensions. For further information on bearing part number to colour cross-references, refer to the electronic parts catalogue EPC. 1....
Crankshaft main bearing/journal checking, measuring and bearing selection
Using selective bearings compensates for minor differences in crankshaft main bearing journal and crankcase dimensions. For further information on bearing part number to colour cross-references, refer to the EPC. 1. Measure the bearing to crankshaft...
Balancer shaft — exploded view
Balancer The balancer is fitted to control pulsing within the engine. Without any form of balancer, the engine would pulse each time the crankshaft rotated. This pulsing would be felt as a vibration which would amplify as the engine speed was...
Balancer — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Balancer — inspection
1. Inspect all gears for chipped or missing teeth. 2. Inspect all bearings for signs of overheating (blue discolouration), seized or damaged rollers, and any other damage. 3. Inspect the backlash spring for deformities, damage etc. 4. Inspect the...
Balancer — installation
Note: Before assembling the backlash gear to the balancer shaft, lubricate all contact surfaces of the balancer drive gear, backlash spring and backlash gear with new engine oil which meets specification API SH (or higher) and JASO MA. Note: Before...
Starter drive and sprag clutch
Exploded view – flywheel, sprag clutch and starter gears
Starter drive/sprag clutch — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Starter drive/sprag clutch — inspection
1. Check the sprag clutch bearings for overheating, wear and/or non-smooth operation. Replace the sprag clutch if overheating, wear and/or non-smooth operation is found. 2. Examine all gears for chipped teeth and for any other damage. 3. With the...
Starter drive/sprag clutch — installation
1. Locate the sprag clutch to the sprag clutch housing as shown below. Push firmly until the lip seats in the recess provided in the housing. 1. Sprag clutch housing; 2. Sprag clutch assembly 2. Fit the housing to the alternator rotor. 3. Ensure...
Engine — removal
Warning! Make sure the motorcycle is stabilised and adequately supported. A correctly supported motorcycle will help prevent it from falling. An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle. Perform the...
Engine — installation
1. Position the engine beneath the frame. 2. Raise the engine, looping the drive chain over the output sprocket as it is raised. Caution! Unless the following engine mounting bolt installation/tightening sequence is precisely followed, severe frame...

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765 R/RS 4 (2017-2024) 
  • Information for owner
  • Introduction to manual
  • Engine and systems
  • Engine repair
  • Fuel and control system
  • Lubrication system
  • Cooling system
  • Transmission
  • Running gear and frame
  • Frame and hinged elements
  • Front suspension and handlebar
  • Rear suspension
  • Brake system
  • Wheels and tires
  • Electric equipment
  • Equipment and devices
  • Starting and charging system
  • Electrical circuits
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