Specifications of engine (Harley Street 750)

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Engine

Table 4-1. Engine

ITEM	XG500		XG750
Number of cylinders	2
Type	4-cycle, SOHC, 60 degree V-Туре, liquid cooled
Bore	69 mm	2.72 in	85 mm	3.35 in
Stroke	66 mm	2.6 in	66 mm	2.6 in
Piston displacement	500 cc	30 in³	749 cc	46 in³
Engine rev limiter speed	8000 rpm
Idle speed	1200 rpm
Engine and transmission weight	71.2 kg	157 lbs	70.3 kg	155 lbs

Table 4-2. Oil Pump

ITEM	XG500	XG750
Type	Gerotor, internal oil pump, wet sump
Pressure	207-552 kPa (30-80 psi) at 3000 rpm Normal operating temperature of 70°C (158°F)
Filtration	Spin-on oil filter

Table 4-3. Water Pump

ITEM	XG500	XG750
Type	Impeller-type, thermostat controlled bypass

Table 4-4. Valve Diameter

ITEM	XG500	XG750
Intake	27.0 +/- 0.1 mm (1.06 +/- 0.004 in)	34.20 +/- 0.1 mm (1.34 +/- 0.004 in)
Exhaust	23.0 +/- 0.1 mm (0.90 +/- 0.004 in)	28.90 +/-0.1 mm (1.13+/-0.004 in)

Table 4-5. Valve Lash

ITEM	XG500		XG750
Intake	0.13-0.18 mm	0.005-0.007 in	0.15-0.20 mm	0.006-0.008 in
Exhaust	0.18-0.23 mm	0.007-0.009 in	0.20-0.25 mm	0.008-0.01 in

Table 4-6. Cylinder Heads

ITEM	XG500		XG750
Valve guide in head (interference fit)	0.025-0.051 mm	0.001-0.002 in	0.025-0.051 mm	0.001-0.002 in
Valve seat in head (interference fit)	0.059-0.1 mm	0.002-0.004 in	0.075-0.12 mm	0.003-0.005 in
Valve guide I.D.	4.3-4.5 mm	0.169-0.177 in	4.3-4.5 mm	0.169-0.177 in

Table 4-6. Cylinder Heads

ITEM		XG500		XG750
Valve stem diameter	Intake	4.868-4.882 mm	0.191-0.192 in	4.868-4.882 mm	0.191-0.192 in
	Exhaust	4.868-4.882 mm	0.191-0.192 in	4.868-4.882 mm	0.191-0.192 in
Valve to guide running clearance	Intake	0.018-0.047 mm	0.0007-0.0018 in	0.018-0.047 mm	0.0007-0.0018 in
	Exhaust	0.028-0.057 mm	0.0011-0.0022 in	0.028-0.057 mm	0.0011-0.0022 in
Valve seat runout		0.03 mm	0.001 in	0.03 mm	0.001 in
Valve seat to guide runout		0.05 mm	0.002 in	0.05 mm	0.002 in
Cylinder head flatness		0.05 mm	0.002 in	0.05 mm	0.002 in
Intake valve stem protrusion		40.84-41.21 mm	1.60-1.62 in	42.87-43.27 mm	1.68-1.70 in
Exhaust valve stem protrusion		42.43-42.83 mm	1.67-1.68 in	42.87-43.27 mm	1.68-1.70 in

Table 4-7. Valve Springs

ITEM	XG500		XG750
Valve spring free length	nominal-40.0 mm	nominal-1.57 in	nominal-39.1 mm	nominal-1.53 in
Valve spring installed height	nominal-35.5 mm	nominal-1.39 in	nominal-35.5 mm	nominal-1.39 in
Spring force installed	158-182 N	35.51-40.91 lbf	198-222 N	44.51-49.90 lbf
Spring force compressed at 9 mm (0.35 in) lift	483.7-531.7 N	108.74-119.53 lbf	713-761 N	160.28-171.07 lbf

Table 4-8. Cam Drive

ITEM	XG500	XG750
Intake lobe peak lift angle (Front/Rear)	98/92 degrees ATDC	112/97 degrees ATDC
Exhaust lobe peak lift angle (Front/Rear)	114/90 degrees BTDC	113/100 degrees BTDC
Total intake lift	7.65 mm (0.30 in)	9.20 mm (0.36 in)
Duration, intake at 1 mm (0.39 in)	201.2 degree (Crank)	214.1 degree (Crank)
Total exhaust lift	8.31 mm (0.33 in)	9.15 mm (0.36 in)
Duration, exhaust at 1 mm (0.39 in)	225.4 degree (Crank)	220.4 degree (Crank)

Table 4-9. Piston Ring Gap

ITEM	XG500	XG750
Top ring gap (maximum)	0.350 mm (0.0137 in)	0.350 mm (0.0137 in)
Top ring gap (minimum)	0.200 mm (0.007 in)	0.200 mm (0.007 in)
Second ring gap (maximum)	0.550 mm (0.0216 in)	0.550 mm (0.0216 in)
Second ring gap (minimum)	0.350 mm (0.0137 in)	0.350 mm (0.0137 in)
Oil control ring gap (maximum)	0.700 mm (0.0275 in)	0.700 mm (0.0275 in)
Oil control ring gap (minimum)	0.200 mm (0.007 in)	0.200 mm (0.007 in)
Top ring side clearance (maximum)	0.045 mm (0.0017 in)	0.045 mm (0.0017 in)
Top ring side clearance (minimum)	0.025 mm (0.0009 in)	0.025 mm (0.0009 in)
Second ring side clearance (maximum)	0.070 mm (0.0027 in)	0.070 mm (0.0027 in)
Second ring side clearance (minimum)	0.050 mm (0.0019 in)	0.050 mm (0.0019 in)

Table 4-10. Connecting Rod and Piston

ITEM	XG500		XG750
Rod small end bore diameter	20.015-20.025 mm	0.7879-0.7883 in	20.015-20.025 mm	0.7879-0.7883 in
Piston pin diameter	19.995-20.000 mm	0.7872-0.7873 in	19.995-20.000 mm	0.7872-0.7873 in
Running clearance	0.015-0.030 mm	0.0005-0.0011 in	0.015-0.030 mm	0.0005-0.0011 in

Table 4-11. Balance Shaft and Crankcase

ITEM	XG500	XG750
Case bearing bore - right side balance shaft	51.965 mm (2.045 in)	51.965 mm (2.045 in)
Case bearing bore - left side balance shaft	54.965 mm (2.163 in)	54.965 mm (2.163 in)
Case bearing bore - right side transmission input	61.965 mm (2.439 in)	61.965 mm (2.439 in)
Case bearing bore - left side transmission input	41.971 mm (1.652 in)	41.971 mm (1.652 in)
Case bearing bore - right side transmission output	41.971 mm (1.652 in)	41.971 mm (1.652 in)
Case bearing bore - left side transmission output	61.965 mm (2.439 in)	61.965 mm (2.439 in)

Table 4-12. Connecting Rod Journals

ITEM		XG500		XG750
Rod bearing journal	A	42.974-42.982 mm	1.6918-1.6922 in	42.974-42.982 mm	1.6918-1.6922 in
	В	42.982-42.990 mm	1.6918-1.6925 in	42.982-42.990 mm	1.6918-1.6925 in
Rod bearing bore without bearing	A	46.000-46.008 mm	1.8110-1.8113 in	46.000-46.008 mm	1.8110-1.8113 in
	В	46.008-46.016 mm	1.8113-1,8116in	46.008-46.016 mm	1.8113-1.8116 in
Rod bearing bore with bearing	A - Journal	43.004-43.036 mm	1.6930-1.6943 in	43.004-43.036 mm	1.6930-1.6943 in
	В - Journal	43.012-43.044 mm	1.6933-1.6946 in	43.012-43.044 mm	1.6933-1.6946 in
Running clearance		0.030-0.054 mm	0.0011-0.0021 in	0.030-0.054 mm	0.0011-0.0021 in
Axial end play		0.17-0.37 mm	0.006-0.014 in	0.17-0.37 mm	0.006-0.014 in

Table 4-13. Crankshaft and Crankcase

ITEM		XG500		XG750
Main crankshaft journal		44.965-44.980 mm	1.7702-1.7708 in	44.965-44.980 mm	1.7702-1.7708 in
Crankcase main bearing bore with shells		44.994-45.006 mm	1.7714-1.7718 in	44.994-45.006 mm	1.7714-1.7718 in
Running clearance		0.014-0.041 mm	0.0055-0.0161 in	0.014-0.041 mm	0.0055-0.0161 in
Crankcase main bearing bore without shells	Grade A - Blue	49.016-49.010 mm	1.9297-1.9295 in	49.016-49.010 mm	1.9297-1.9295 in
	Grade В - Black	49.022-49.016 mm	1.9300-1.9297 in	49.022-49.016 mm	1.9300-1.9297 in
	Grade C - Red	49.028-49.022 mm	1.9302-1.9300 in	49.028-49.022 mm	1.9302-1.9300 in
Axial end play		0.10-0.35 mm	0.0039-0.01377 in	0.10-0.35 mm	0.0039-0.01377 in

Service wear limits

Table 4-14. Piston and Cylinder Liner

ITEM	Replace if Wear Exceeds
	XG500	XG750
Cylinder liner inner diameter bore (freestate)	69.03 mm (2.7177 in)	85.03 mm (3.3476 in)
Cylinder liner out of round (freestate)	0.02 mm (0.0007 in)	0.02 mm (0.0007 in)

Table 4-15. Compression and Leakage

ITEM	Investigate if Value Is Below
	XG500	XG750
Compression (dry) Wide Open Throttle	160 psi (1103 kPa)
Leakage (dry) at 100 psi (689 kPa)	15%

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Article about repair motorcycles «Harley Street 750/500» (2014-2021): «Specifications of engine»: https://motoinstruction.ru/en/Harley/Street/750/engine/repair/115992 <a href="https://motoinstruction.ru/en/Harley/Street/750/engine/repair/115992">Specifications of engine</a> - article about repair motorcycles «Harley Street 750/500» (2014-2021) from section «Engine repair». [url=https://motoinstruction.ru/en/Harley/Street/750/engine/repair/115992]Specifications of engine[/url] - article about repair motorcycles «Harley Street 750/500» (2014-2021) from section «Engine repair».