How to solo Machamp

2-3 Alakazams and/or Espeons with Futuresight (preferably at least 1 with Confusion)
1-2 Dragonites with Hurricane (ignore the fast move)
1-2 Exeggutors with psychic fast move and Psychic (the charge move). Solarbeam is fine too.

1. Espeon ZH/FS 2678cp
2. Alakazam PC/FS 2671cp
3. Dragonite DT/H 3109cp
4. Dragonite DT/H 3083cp

I've solo'd nine Champs with that lineup usually never use up the second Dragonite...I also dodge all charge moves.

but I only have one pass per day so I dont want to waste it.

Just in case you don't know, a raid pass unlocks the raid at the gym for the entire duration of the 2 hour raid timer. If you fail the raid, you can retry as many times as you want at that same raid until the end of the 2 hour period.

I soloed my first one the other day. Made it was a few seconds left even though I dodged horribly. My team:

Alakazam x2 (C/FS, C/P)
Espeon (ZH/PB)
Eggs x2 (C/P, E/P)
Dragonite (DT/H)

All Lv30 or slightly above. Think I could make it not as close next time if I dodge better with my 'Zams

Glad you asked this - trying to work up to this myself, so I've been reading the answers with interest. Only thing is my best Alakazam has Psychic instead of FS and with my luck, I'd get Focus Blast if I TMed it...