1 nearby a broken motorcycle on the Rivet City main Flight Deck.

Ruins on the north-northwest side of the east eastern ruins.

1 in a super mutant camp on the edge of the D.C.

1 in Tepid Sewers in the same room as the key locked safe.

1 in Pinkerton's lab with a lot of other parts.

1 is outside a diner, within 1 sq (refer to your world map) north of Nuka-Cola Plant.

1 can be found inside Anchorage Memorial on a workbench, next to two cherry bombs.

1 can be found along with a motorcycle gas tank in the right back room in the Super-Duper Mart.

1 by selecting the science theme for your Megaton house.

1 at Springvale School, next to a motorcycle gas tank.

2 in the scrapyard, there are several motorcycles.

Keep walking on the corridor until the end(some sort of maintenance area with two generators.) The two motorcycle handbrakes are there, along with two motorcycle gas tanks. Upon entering the Archives sector, go down the stairs and turn left.

2 in Smith Casey's Garage along with a motorcycle gas tank.

One is on the east side of the Gillian House, and the other is on the southwest side of the Benson House. Each is located near the burned out remains of a motorcycle, along with a motorcycle gas tank.

3 on a table next to three motorcycle gas tanks in the middle of a raider encampment next to the Flooded Metro.

Here, you can also find at least one of each type of all the other items needed to make custom weapons.

3 in Lucky's, southwest of Tenpenny Tower.

4 in Murder Pass laying in a refrigerator at first open area going north from Little Lamplight (along with 3 motorcycle gas tanks).

This section is needed but has not been written yet.

Fallout 3 murder pass gate