Each tooth change in the front is about the same as three teeth changed in the rear. So going -1 front/+2 rear is a huge change. If you're happy with how it works now, I'd leave it. Why "fix" what isn't broken? If you do mostly city, or tight twisty roads, then gearing up might be good, making it smoother and torquier at low speed. If you do mostly mid-to highish speeds on open twisty roads, then the stock gearing might still be the best compromise. If you do a lot of highway or high speed work, regearing in the other direction might even be the right answer.
Many years ago, I decided to go *down* two teeth in the rear on my M900, because I do a lot of highway work. In SoCal, freeway speeds are often 85-90,ph just to keep with traffic. I also do long-distance touring on my Monster. So gearing down instead of the usual up was right for me, because I use mine differently than most people.
PhilB
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1993 Ducati M900 Monster "Patina" (198,000 miles, so far) -- 1995 Ducati M900 (wife's bike) -- 1972 Honda CB450 (daughter's bike) -- 1967 Alfa Romeo GT Jr. (1300cc) -- 1964 Vespa GS160 (160cc 2-stroke) -- 1962 Maicoletta scooter (275cc 2-stroke) -- 1960 Heinkel Tourist 103A1 scooter "Elroy" (175cc 4-stroke)
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