Having a little bit of a problem w my 94 blaster. I noticed it was getting boggish the more and more i rode it. Took it out to the mounds in genesee county, mi and it started getting really bad. So i took it home and cleaned the carb out. Cleaned it spotless and put it back together. Fired it up and it ran great probaby better then it ever has. Lots of power. But i noticed that its running offly lean. Next to no smoke out the exhaust. Usually they smoke a bit. Checked thr plug and forsure its running lean. I have a fmf gold series exhaust w a powercore 2 muffler. It has been bored over .20. (None of which was installed by me)Im pretty sure it still has the stock jetting in the carb. After it being cleaned could it cause it to run lean like that? Or would that be a possible oil pump malfunction? Im leaning to do the block off but have never had an issue w the pumps personally. Any help would be great thank u in advance.