Hi! I have done over 6500 km, driving SPEED150. I can say this bike is very good. The engine has some power to spare, I am going to replace rear sprocket to 36 teeths (reduced). I would like to check valves adjustment, but I miss the distance data. It is not in user manual. Well, I see also some drawbacks with SPEED 150. Especially side covers are weakly fixed, can not bear often removal. Front dampers does not work smooth any more. Main fuse failure. Excessive corrosion. Anyway, this bike is a good value for money. 
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