You want to source a cub rear, I believe some Bantam hubs are narrower than cubs I've done this mod for quite a few people on cubs. Your D14b sports should render quite afew sellable parts. The forks are two small to trick up to 35 mm but will trick up to 32 mm. The best cheap engine mod is to go 185, the barrel bored out to accept a Suzuki ts 185 piston. Again I have done this mod for about 15 people.