Finally I have got my engine safe arches. Engine protection is quite common in countries such as USA or Russia , but in China Japanese 600cc bikes are very rare and the owners don't really care about them. Therefore I had no other choices like order the arches by myself.
Of course, I could go to amazon or alibaba and order the arches from there, but matter of time and money made my decision.
Here we go, some photos of the work progress and the final result.
And a bonus: