I would like to throw this out here for some input or ideas. I am working on running Maxxis tires and they are 2.5 wide (I already have them on). The wheel needs to be pushed over and the sprocket brought out a bit. I’m thinking of spacer washers or thin nuts threaded on the chain side rear wheel axel to push the wheel over and spacers on the bolts between the sprocket and hub adapter. Any thoughts or input would be appreciated
James, I dig the fact that you are using 2.5" tires. I'm using 2.35" Schwalbes on both of my current motor-bikes. For most frame, a 2.5" tire would be a tight fit!
-Consider a Manic Mechanic Hub Adapter, which allows for side-to-side adjustment/movement, in addition to keeping the rear sprocket perfectly true.
-Adjust the rear wheel so it just barely clears the pedal-side chain, in order to allow maximum space for the engine-side chain.
-If neccessary, also consider a standard, KMC-brand 415 chain, as opposed to the 415H chains that come with the engine kits. the 415 will still fit the sprockets you have, but has less width than a 415H, with minimal tensile strength difference. This will give you a slight advantage for tire clearance, though it is a slightly weaker chain.
If all else fails, maybe a Sick Bike Parts shift kit, so you only have the pedal chain going back.