1984 Official Honda TRX200 Shop Manual, Page 68Get this manual
TRX200 VALVE SPRI NG INSPECT ION
Measure the free length of the inner and outer valve springsSERVICE LIMITSINNER35.5 mm (1.40 inOUTER41.0 mm (1.61 in )
CYLINDER HEADIVALVES
VALVE IV VE GUIDE INSPECTION