Yamaha TT-R90 Manuel D'atelier Du Proprietaire page 66

Lubrication system:
Oil filter type
Oil pump type
Tip clearance "A" or "B"
Side clearance
Housing and rotor clearance
MAINTENANCE SPECIFICATIONS
Item Standard
Wire mesh type
Trochoid type
0.15 mm
(0.0059 in)
0.13 ~ 0.18 mm
(0.0051 ~ 0.0071 in)
0.06 ~ 0.10 mm
(0.0024 ~ 0.0039 in)
2 - 9
SPEC
Limit
----
----
0.2 mm
(0.0079 in)
0.23 mm
(0.0091 in)
0.15 mm
(0.0059 in)