I drained the oil on my 74 dt 175 and I think i could smell gas in the oil... What could cause that? Running it too rich?

Possibly but also the crank seal leaking would do that

Yes right hand side (clutch side) crank seal

awesome... thank you! I've been battling this bike since last summer. I had it in the shed for the winter and just pulled it out. Sometimes all you need is a fresh start on a project to regain your oomph on it.