Rather than revive a thread from 2017, I am reposting a question that posted that point. For the several years that I have owned it, the range selector on my YM1610D has been very difficult to shift, to the point that the shift lever actually broke off and I am now shifting with vice grips. There is no apparent rust and I can occasionally shift with less resistance but generally it requires considerable tweaking with going through the gears engaging and disengaging the clutch, etc. I gather that the problem may be a broken spring in the range shifter valve. If this could be the culprit, could someone advise me how to access the valve assembly? I have the service manual which is no help and the parts manual which is written in Japanese.