I would say yes. They used orange gelcoat on the shorter 7/8" tube MX/MB frames (frames were a silver color). Also note, because you had asked in your first post, hardly any mini bike equipped with an H50 could accommodate an engine mounted tank. They had to sit quite abit higher than the head of the engine in order to flow fuel because the carb height. Mini bike frames could not clear them, hence the remote tanks having to be used. They were a necessity, not just an option.