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Umm a 1987 YZ250 was a 2 stroke not a 4 stroke, but you should go to any local Yamaha dealer and get the oils for your bike, and depending on the oil you want wether it is transmission oil, or fuel mix oil, if you have a old bike I would use Yamaha's reccomended oil which is yamalube if it is a newer bike I would suggest synthetics if your bike is brand new.
For the gears, use an 80 or 85 weight motorcycle gear oil. Honda sells a good one. On the '87 it tells you how much gear oil to use on the side of the case. For mix, its a 24:1 ratio. Go buy a Clymer repair book from your shop or online.
What else can I help you with?
What kind of Yamaha do you have?
1994 YZ250 with an FMF fatty and it is FAST!
What kind of antifreeze to put in a yz250 dirt bike?
Green my friend
What kind of gas should you use on my 2005 yamaha R1?
Regular
What kind of oil do you put in a 1987 Yamaha Warrior 350?
About 2.5 Quarts of 10w 40 wet clutch oil.
What kind of brakes does a 1988 Yamaha yz250 have?
They have Disc brakes both front and back stock they came with Nissin braking system, they use DOT4 brake fluid, if you be more specific with your question I could be able to answer better my email is protechav@yahoo.com
What kind of gearboxoil do you use on a 2002 model Yz250?
According to Yamaha you use 15W-30 Yamalube I would however recommend Amsoil's 10W-30 Advanced Synthetic Motorcycle Oil Product Code: MCTQT-EA it is a superior oil compared to the Yamalube.
What kind of spark plug should you buy for a 1997 Yamaha Warrior?
For a Ngk plug it is a: NGK DR8EA
What kind of snowmobiles was used in Die Hard 2?
Yamaha
2001 Yamaha road star 1600 What kind of motor oil should you use?
Mobil 1 V-twin
What kind of gas does a Yamaha blaster?
Yamaha Blasters take unleaded gas only.
What kind of oil does a Yamaha virago use?
15w/30 but that is hard to find so I use15w/40
What kind of power steering fluid should you use in a 1987 BMW 535 IS?
Spec is ATF
