Well, so far I didn't really had problems with the suspension, except in bumps. About the rider weight, it is ok for me, since I am 57 kg first hour after the morning piss. I like it being very lightweight.

I didn't notice anything about the "aim where you want to go and hang on", but I didn't try my bike in circuit or anything.

So far I went in the highway and I got 160 kmh from the meter, all stock. I'll try again since I have cleaned the carburetor and let you know. About the real speed of the SP, I found this on wikipedia: "An NSR 150SP currently holds the Bonneville SCTA Land Speed Record for Production 175 cc (10.7 cu in) motorcycles at 104.4 mph". You can see videos on youtube about the top speed but some of them have aftermarket exhaust. I'm maintaining everything stock for now. So, I think the top speed of my bike is allright. I think the SP might have around 10 kmh more. I can't tell because i tried my bike on a limited space and also it has some use.

Andy wrote:The 150RR has a steel liner [that often masks the ports in areas], and old school porting, whereas the 150SP is an all alloy, nikasil plated barrel, with NSR250 style porting.

So, what do you mean by that? I tought the cylinder was the only thing with nikasil.