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.

Triumph Steel Motorcycle Engine

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Lowbrow Customs Rear Motor Mount Plates for Triumph Motorcycles - Chopper Style w/ Key Switch Hole - 1963 - 1970 Triumph
12 reviews $66.05

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

British Standard Rocker Cap/Valve Cover Set Triumph 350 500 650 Unit Twins
3 reviews $40.39

British Standard Triumph Cylinder Base Nut Set Unit 650cc 1969-1972 OEM # S692 21-0692
5 reviews $25.32

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 Side Cover Allen Hardware Set - Triumph 650 / 750 c.c. Motorcycles 1969 & up
7 reviews $22.86

Lowbrow Customs Triumph Oil Feed Chrome Rocker Box Acorn Nuts and Copper Washers #70-1435 70-1335
11 reviews $28.93

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

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

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

British Standard Crankcase Oil Filter 1969-79 Triumph 650 750 T140 TR7 T120 TR6
3 reviews $58.73

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

British Standard Triumph Cylinder Base Nut Set Unit and Pre-Unit 650cc 1946-1968 OEM # P0172A 37-0076
5 reviews $22.67

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

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

British Standard Triumph 650 Head Bolt Set 1963 - 1970 OEM# 70-0327
8 reviews $95.14

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

Lowbrow Customs Rear Motor Mount Plates for Triumph Motorcycles - Chopper Style - 1963 - 1970 Triumph
13 reviews $66.05

Lowbrow Customs Rear Motor Mount Plates for Triumph Motorcycles - Stock Style - 1963 - 1970 Triumph
16 reviews $52.84

EMGO Rocker Box Caps / Covers for Triumph Motorcycles 1963 - 1972 - Chrome
14 reviews $32.17

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

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