I need lots of motorcycles!! The Bolt Action metal one I've got is a really poor cast and I'm reluctant to buy more although I like the sculpt per se.
Plastic would much nicer..but how long before they will be released..
Personally, I quite like the Black Tree Designs BMW motorcycle, both in the single and sidecar-combination variant. I built a couple over the years (sadly let them go), and stripped and painted up one I got second-hand just a week ago. I'd say the greatest difference is with the heads - I prefer the BTD ones, but you could chop off those and add Warlord plastic parts to make them blend in more. Drivers' goggles might be an issue, though.
In any case, if you are looking for an alternative, I'd say take a look at the BTD one. The price is a bit steep, but I am seriously considering getting some more to do a Recce patrol.