I found a Sportster engine for sale. What are the first things I should check or replace?

When starting with a used engine of unknown history, it's wise to at least perform a top-end refresh. This typically includes new gaskets, checking cylinder and piston tolerances, and inspecting the valve train. This gives you peace of mind and a reliable starting point.

What are the easiest ways to get more power from my stock Sportster engine?

The most common and effective "Stage 1" upgrades are improving airflow. This means installing a high-flow air cleaner and a less restrictive exhaust system. These two changes allow the engine to breathe more freely and will deliver a noticeable performance gain without ever opening up the motor itself.

I'm rebuilding my engine. How important is it to replace all the hardware?

While not always strictly necessary, it's highly recommended. Engine hardware is subject to countless heat cycles and stress, which can cause it to stretch and weaken over time. Using new, high-quality head bolts, case bolts, and other hardware ensures proper torque specs and a leak-free, reliable engine for years to come.

Raw Triumph Motorcycle Engine

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British Standard Oil Pump unit Triumph Motorcycles 1963-1980 - Made in the UK OEM # 70-9421
12 reviews $162.03

SRM Engineering SRM Oil Pressure Release Valve for unit Triumph & BSA Motorcycles
11 reviews $114.90

EMGO Pistons for Triumph 650 c.c. Motorcycles - +0.060
3 reviews $114.66

EMGO Top End Engine Gasket Set Triumph 650cc 1963-72 T120 Bonneville TR6 Tiger
6 reviews $77.14

Kibblewhite Precision Machining Black Diamond Exhaust Valve Triumph 650 750 OEM # 70-2904
3 reviews $31.01

Grant Piston Rings Piston Rings for Triumph 650 c.c. Motorcycles - .060 over
$60.45

EMGO Pistons for Triumph 650 c.c. Motorcycles - +0.020
4 reviews $114.66

British Standard Engine Oil Seal Kit - 7 Piece - 1963 - 1972 Triumph Unit 650
21 reviews $50.19

Kibblewhite Precision Machining Tappet Blocks 1969- 1983 for Triumph 650 / 750 Twins OEM # E9352 E9353
2 reviews $99.99

British Standard Rocker Box Oil Feed Pipe for Triumph 650 / 750 c.c. 1963 - 1982 #71-2428
5 reviews $92.41

British Standard Rod Bearings for Triumph 650 and 750 c.c. Motorcycles - Standard OEM # 70-3586
19 reviews $91.75

British Standard Metric Timing Side Crankshaft Bearing for 1972-80 Triumph 650 750 Unit Twin Motorcycles OEM # 70-3835
$87.90

Kibblewhite Precision Machining Intake Valve Standard Triumph 650 / 750 1963-83
1 review $21.49

Kibblewhite Precision Machining Exhaust Valve Standard Triumph 650 / 750 1963-83
5 reviews $21.49

British Standard Triumph Copper Head Gasket 9 Bolt - 650cc Triumph twins 1963 & up OEM # 70-4547
7 reviews $33.96

Grant Piston Rings Piston Rings for Triumph 650 c.c. Motorcycles - STD
2 reviews $60.45

British Standard Pushrod Tube Seal Kit - Triumph 650
18 reviews $26.46

British Standard Outer Gearbox Gasket for unit 650cc and 750cc Triumph Motorcycles 1963 and Up OEM #71-1448
12 reviews $8.77

Kibblewhite Precision Machining Black Diamond Intake Inlet Valve Triumph 650 750 OEM # 70-4603
3 reviews $31.01

British Standard Rotor Key - Triumph Unit 650 750
2 reviews $8.37

Kibblewhite Precision Machining Connecting Rod Wrist Pin Bushing for 650/750 Triumph 1963 - 1983 OEM # 70-0459
3 reviews $16.50

Lowbrow Customs Triumph Oil Feed Brass Rocker Box Acorn Nuts and Copper Washers
18 reviews $28.93

British Standard Sludge Tube for your 650cc 750cc Triumph Motorcycle OEM # 70-3903
6 reviews $27.52

British Standard Points Cover Gasket Triumph Twins and Singles
8 reviews $5.30

British Standard Rocker Box Gaskets 1963-1970 Triumph 650cc T120 Bonneville/TR6/Tiger
$8.19

British Standard Ignition Pillar Bolt - Triumph / BSA
7 reviews $7.60

Award Cycle Finned Timing Cover - Triumph Pre-Unit Generator Models
$749.99

EMGO Top End Engine Gasket Set with Head Gasket Triumph 750cc 1973-1983 T140 Bonneville TR7
$59.15

Grant Piston Rings Piston Rings for Triumph 650 c.c. Motorcycles - .040 over
$60.45

Grant Piston Rings Piston Rings for Triumph 650 c.c. Motorcycles - .020 over
$60.45

Kibblewhite Precision Machining Outer Camshaft Bushing for Triumph 500 / 650 / 750 Twins OEM # E10286
1 review $17.77

Kibblewhite Precision Machining Intake and Exhaust Valve Spring Set for 1963 - 1972 Triumph 650 Motorcycles OEM # 99-7037 70-4221 or 70-7400
1 review $54.24

Kibblewhite Precision Machining Valve Guide Intake Exhaust Standard Size Manganese Bronze Triumph 650
3 reviews $19.44

Kibblewhite Precision Machining Chrome Moly Pushrods for 650cc Triumph Twins Race or Street Use
11 reviews $80.30

British Standard Main Roller Bearing for 1966 - 1972 Triumph 650 Unit Twin Motorcycles OEM # 70-2879
13 reviews $198.47

EMGO Pistons for Triumph 650 c.c. Motorcycles - Standard
2 reviews $114.66

EMGO Pistons for Triumph 650 c.c. Motorcycles - +0.040
1 review $114.66

British Standard Engine and Transmission Lock Tab Set - 1963 - 1972 Triumph 650 with 4 Speed Gearbox
14 reviews $20.86

British Standard Side Cover Allen Hardware Set - Stainless- Triumph 650 c.c. Motorcycles 1963 - 1968
12 reviews $42.35

British Standard Pushrods for Triumph Bonneville 650 Motorcycles - Set of 4- OEM# 70-2620
2 reviews $95.08

British Standard Triumph Crankshaft Main Bearing- Right Side- OEM part# 70-1591
3 reviews $84.22

SRM Engineering SRM Oil Pressure Release Valve for pre unit Triumphs
5 reviews $120.99

British Standard Rocker Box Caps / Covers - Starburst MCM Style - for Triumph Motorcycles 1963 - 1972
5 reviews $111.80

British Standard Allen Sludge Trap Plug for your Triumph Motorcycle
9 reviews $22.33

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