by zozman » Fri Sep 27, 2019 10:58 am
The Honda CN 250 engine was derived from the Honda CH 250 was the inaugural introduction of the engine in 1985. So what was the oil change intervals that Honda recommended when the original service manual was written in 1984?
Honda CH 250 recommended oil change intervals based upon the 1988 revision of the service manual: 1985 1250 miles, 1986 1250 miles, 1987 1250 miles, 1988 2000 miles.
Honda CN 250 recommended oil change intervals based upon the 1993 revision of the service manual: 1986 1250 miles, 1987 afterward 2000 miles.
The longer oil change interval appears to have come, therefore between 1986 and 1987.
Considering the Elite CH 250 and the Helix CN 250 has only a .8 quart oil capacity and no oil filter, longer durations of operation between oil change intervals is, in my opinion, questionable.
I recommend full synthetic oil at the 1000 mile interval.
zoz
87 & 98 Helix