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 Lowbrow - BOM Motorcycle Engine

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British Standard Stainless Steel Top Motor Mounts / Head Steadies for unit Triumph Motorcycles
14 reviews $29.86

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

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

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

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

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

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