I am retired from Tate's Auto Service in Western NC and I started working on Briggs, probably like you, at age 10. I know little about gearing. I bought a 2.8 hp Baja DB30s bike and it will not pull a 30 degree grade. Speed is good, runs fine. I think this bike either needs a jackshaft kit or a converter kit (like Comet) to boost pulling ability. Is this a good idea or should I spring for much more and a larger engine? I was referred here by OldMiniBikes Warhouse and was told a jackshaft kit for this bike was for sale by hotrodminibike on this forum. I am new and any advice will be appreciated! Who am I? Google adobekid1.