I have an original mtx200R from 1986.it is a new motorcycle with only 800miles.After 500miles the 2nd gear blocked.Because i am an honda dealer´s workman i did change the fork and the 2nd gear of the gearbox.I have did this work 3 times and the 2nd gear keeps on blocking after about 100miles.If someone has a 2nd hand gearbox or engine let me know