I'm on bcsb but not really active.
I wouldn't buy a MC28 complete and dismantle it because there is a liklihood they might reject it. They are afraid you will try to register it as a home built. You could bring it in as a racing bike but then you will have to have a valid racing license.
Best thing to do is dismantle everything, carry one frame, two engines is probably OK but one of everything else. As long as Transport Canada believes you can only make one bike. So it's a big, big gray area. I tried to ask them what constitues a "bike" and he never got back to me. I definitely know if I bring in just a frame it is not considered a bike but I believe a frame and engine (even without any other parts) is considered a bike.
The MC21 and MC28 you see in HK are sh*t. I looked for my MC28 for 4 years and finally found an SE with SP parts in good condition but it cost me $5000USD. The MC21 was in OK shape but still not as good as the MC28. Believe me, they're all rusted and thrashed out here.
Go to yahoo groups and search for "ripready" and you will see my bike and parts off of a MC21 I am selling.
I'm not on MSN but on Yahoo Messenger. You can find me as ripready.
Here's what I suggest you do:
1. MC21 frame with the original MC21 engine. Difference is flywheel, oil pump, Gear Position Sensor, Carbs and throttle position sensor and electrics. Pick up the MC28 parts above and the electrics and loom.
2. Scrap the bodywork, I would go with the TYGA stuff because the bodywork out here will be crap
3. Go with a front fork conversion (RS250 or something you can get in the US). I think the bike looks way better with an USD conversion. I currently have a RVF front but switching to a 2001 RS250 front I purchased from LA.
To tell you the truth, I like the single sided swinger but the electrics on a MC28 just aren't practical. You can't make duplicate keys because it uses a keycard. You lose it and you're out of luck. If you want something really cool, go for a MC21 engine and then use a MXL Pista digital gauge which looks way better than the stock Honda one.