Does anyone have a fix for the clutch and brake perch, cable tightening screws no longer fit in perch

Hello Steve, and welcome to the forum

Oils have changed a lot since the days when these vintage Yamaha Enduros were made.

What's most important now days, isn't which weight of oil you use in the transmission case (30wt or 10/30wt), . . . it's that you use an oil that is designed for use in "wet clutch" applications. If the bottle or can doesn't state "For Use With Wet Clutch's" or, ... carry the JASO M1 or M2 rating, then don't risk using it . . . otherwise, you'll risk that the clutch plates will start slipping.

As for the oil tank, that's tucked up under the left side of the seat, definitely look for a product that says something like: Two Cycle Oil, or ... 2-Stroke Oil ..... better yet, If the container says ... For use in oil injection systems

Probably easiest to find if you visit any one of the Japanese brand dealerships. They'll likely have a variety of oils that are appropriate for you to choose from

There is many options available, it depends what you want. Vape is probably the most popular. They offer an A/C or D/C version. If it were my bike, I would buy the 12 Volt D/C kit. You would have to change out the 6 volt components - the light bulbs/flasher - and install 12 volt bulbs/flasher. The 6 volt horn will still work, without having to replace it. It will be louder.

Vape: https://www.vape.eu/en/yamaha-dt-250360400dc-version

Rex Speed Shop: https://rexs-speedshop.com/

HPI: https://www.hpi.be/

A bit late to the game I believe. I poured hot water on it and it pried out easily with a screw driver. If rubber is cracked I would consider replacing the oil view window.