04' RC with 6K miles (hard miles) did only the oil change - didn't change the filter. First time I added the Synthetic oil -4 qrts.
Noticed yesterday, the bike was feeling a little sluggish. That's when I noticed the bike had too much oil

- drained it to the correct amount. BTW No smoke or anything of that sort. But I can still feel the bike a little sluggish especially around 4-5K rpm.
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