My C90T manual says to change oil every 3,500 miles and the filter every 7,000 miles. I'm like you, though. If I'm going to change the oil, I change the filter, too. Not changing the filter doesn't make sense to me, either. But, if you follow the manual, and something goes wrong while it's still under warranty, it's their problem. Mine is still under warranty, but I still change the filter every time.
I bought a motorcycle jacking, thinking I could lift the bike, and it would be easier to change oil. The problem is that when I put the jack under the bike where it balances and both wheels go off the ground, it blocks either the plug or the oil filter. So, I use a cake pan.
I bought a motorcycle jacking, thinking I could lift the bike, and it would be easier to change oil. The problem is that when I put the jack under the bike where it balances and both wheels go off the ground, it blocks either the plug or the oil filter. So, I use a cake pan.