Sam Brumby's a regular from last year, he has 2 bikes both based on Japaneese donors, the one to the right is Yamaha XJ based and carries an 850cc parallel twin Ruggerini engine that Sam saved from roadsweeping duties. I must say it runs very well and carried him and his missus on the Sat afternoon ride with great aplomb, the rest of us were too slow for him apparently.
The smaller of Sam's bikes is Honda Superdream based, with an Albion 3 speed hand change gearbox, check out the gas ram centre stand spring.
Just to prove that you can fit a V twin into a Bullet frame here's Wolfgangs 750 Yanama water cooled creation - complete with frying pan flywheel cover.
Now I know MZ's are sturdy bikes but adding an 850 Ruggerini must be close to cruelty, it sits very low to the ground too.

Just take a look at the quality of the primary belt drives and the covers - nice.
Diesel Rally 2