Suzuki dt20 runs rough at mid range

Time off

Recruit
Joined
Jul 7, 2008
Messages
1
Previous owner says it has been sitting for 3years and I think it is around a 1984. I cleaned carbs, filters but they did not need it and there was not a change in how it runs. It starts fine, idles fine, but the lower mid range it seems to have a miss or just runs rough. I have good power and the top end runs good with a slight surge in rpm, maybe 25 or 50 at the most. I noted that one side of the exhaust ports on the lower unit is clean and the other side has a oil trail on it. I have never had a Suzuki before, do they just run rough and sound funny? Any ideas on things to check? Thank you for any help.
 
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