type spark plug: DR8ES-L
Electrode gap: 0.6-0.7mm (0.024-0.028in)
Tightening torque: 20Nm (2.0m-kg, 14.5ft-lb)
K&N part # KN-144 Seems to be a little better flow, and does catch a little more 'crud' Yamaha part # 1L9-13440-91-00 ELEMENT ASS'Y, OIL CLEANER Note that as far as I've been able to tell, all xs400's used the same filter.
1978 to 1981 DT-175 with CDI (no ignition points) spark plug gap .6-.8mm or .024-.032 inch, spark plug# B9ES
It has a twin, four-stroke engine type and its displacement is 392.00 ccm. Its compression ratio is 9.2:1 and has Êan expanding brake. Fuel capacity is 17 liters.
From the user manual, 0.7-0.8 mm
If it's a 1981-83 with BP7ES NGK spark Plug use a 0.032 inch gap.
1978 to 1981 DT-175 with CDI (no ignition points) spark plug gap .6-.8mm or .024-.032 inch, spark plug# B9ES
The recommended spark plug gap for a 1981 VW Rabbit is .028"
Answer:Given the make and year, I would go with a 10W40 viscosity. I own a Chilton's Motorcycle Repair Manual (1959-1981) and in the Yamaha XS360-400 section is states "When the average air temperature is above 5 degrees Celsius (41 degrees Fahrenheit), use Yamalube 4-stroke oil, or SAE 20W-40, service rating SE or SF. When air temperature is consistently below 15 degrees Celsius (59 degrees Fahrenheit), use SAE 10W-30, service rating SE or SF."
The 1981 Honda 200 spark plug gap is .023. Most spark plugs will come pre-gapped from the spark plug manufacturer.
Which one?
6 volts
81hp