The fuel tank and air filter up on top make the engine look even bigger. I've seen a small engine external diaphram fuel pump that you could use with this engine. You would have to drill/tap a hole in the crankcase, insert a hose nipple, and run a hose to the fuel pump. This way, you could place the tank at or below the engine level, making the engine less conspicuous. Likewise, you should be able to relocate the air filter with some judicious hose usage. Unfortunately, I don't think you'll be able to do anything with that big pull starter sheet metal...2) Engine size, legality and visibility - No question that this engine is bigger than a 49cc and more obvious. In the community where I live, I have driven past law enforcement on two occasions. As I approach them, I shut down the engine and simply pedal past them. I don't know if I'm legal or not, or if they care, but I make an effort to use discretion when I know they are around.
Unfortunately, I don't think you'll be able to do anything with that big pull starter sheet metal...
I've started a new rack-mount build. I'm documenting it on my blog which is http://enginepoweredbikes.blogspot.com
This is a belt drive using a 20" rim for a driven pulley, attached to a 26" mountain bike wheel. Take a look at the blog to see what I've come up with. I'd love some ideas on better ways to attach the pulley to the rim if anyone has any.
So many freaks, so few circuses