Yamaha YBR 125 Series
Valve Clearance : 0.08 - 0.12 mm ( inlet ) , 0.10 - 0.14 mm
( exhaust )
Check Valve Clearance Every : 2000km
Note: Adjust valve clearance on cold engine
Spark plug Gap : 0.6 mm - 0.7 mm.
Spark Plug Tightening : 1/2 or 180° for new spark plug and 1/8 or 45° turn for old spark plug
Engine idle speed : 1400 Rpm ± 100 Rpm
Engine oil : 1 liter
Recommended oil viscosity : 10w - 40
Recommended Engine oil API Standard: API SL, MA2
Oil Change Interval : 2000 - 3000 km or earlier ( depends on riding conditions and engine oil type )
Note: use only quality synthetic engine oil for more than 2000 km
Clutch lever Free play : 10 mm - 20 mm
Throttle cable Free play : 3 - 7 mm
Note : first tighten spark plug by hand . for tightening new spark plug turn the spark plug 1/2 turn right with spark plug wrench and then loosen it and then turn it right again this time turn it 1/8 or 45° . this will crush spark plug gasket and securely seat it in the head
Warning : these torque values are only applicable for Yamaha Ybr 125 series spark plug check owners manual for your motorcycle spark plug torque specs