Riffs:

Metallica - Whiskey in the Jar
AC/DC - Back in Black
The Wildhearts - Stormy in the North, Karma in the South
CKY - 96 Quiet Bitter Beings
CKY - Flesh into Gear

Yeah, I struggled with that one. I don't notice many Riffs.

Basslines:

The Mad Capsule Markets - Tribe (It's nothing special, I just love the sound of Takeshi's bass in this song.)
The Mad Capsule Markets - Track 23 on the best of 1990 - 1996 album. (Hay kiss my ass man, I can't read Japanese.)
The Mad Capsule Markets - Possess in Loop
The Mad Capsule Markets - Island
The Mad Capsule Markets - Come (Just for the Bridge)

Yeah. I like Takeshi. :D I guess it's because he doesn't just lay down the Rhthym, a lot of his basslines are also the main Melodies for the song, such as Island and Good Day.

Solos:

The Mad Capsule Markets - Tribe (Bass)
The Mad Capsule Markets - Systematic (Bass)
The Mad Capsule Markets - Midi Surf (Bass)
Iron Maiden - The Evil that Men do
Iron Maiden - No More Lies