02 YZ250 Manual

[burtonbutt1]

Is the service manual from yamaha worth paying 60 dollars for? Does it cover EVERYTHING? I mean every single thing on the bike? I'm looking for a manual and the dealer i talked to recomended the Yamaha one over Clymer or what not.

Also, what ratio do i get when i put 4oz oil to every gallon of gas? I'm using Amsoil Synethic and they recomend 50:1 but i don't want to rejet. What does yamaha suggest?

Marc

[zachrider]

my dad has the same bike you do and he runs 40:1, the manual recomends 32:1, but most mechanics ive tlked to say thats to rich, so we went leaner.

[burtonbutt1]

What does 40:1 equal out to in OZ and Gallons?
I believe if you add less oil, you get a richer mixture, because more gas is able to be in the carburator per unit of fuel. So technically, less oil = richer.
But with synethetic oil, it is safe to go less oil in the gas than recomended right?

[The X-Phile]

A 40:1 ratio equates to 3.2 oz of oil.

The way to figure your gas/oil ratio is to divide the ounces of gas in a gallon (128) by however many ounces of oil you mix into it.

For example, mixing 4 oz of oil -
128/4 = 32:1 ratio

Similarly, you can figure out how many ounces of oil a certain ratio contains by dividing 128 by the ratio.

For 50:1 ratio -

128/50 = 2.56 oz.

Hope it helps!

[twoofeach]

$60? Are you talking about the Owner's Service Manual? I'll take better care of mine. Actually, I have both. I usually reach for the Clymer. I think I paid only about $20 but it is much more detailed. The Yamaha one looks more like a coloring book with all it's black and white diagrams. I prefer looking at "real" pictures. Also, the clymer goes into detail about maintence and repairs where the factory manual thinks your bike is going to stay new forevever.

[burtonbutt1]

i think there is a difference between the owners manual and a service manual. The service manual from yamaha is what is it, a manual for servicing your bike, i just want to make sure it has everything in it.

marc

[twoofeach]

It says "Owner's Service Manual" on the cover. Buy the Clymer. It's twice as thick.

[Spitfire]

I'd also get the Clymers, I picked mine up for 25 bucks, and has *colored*, *real*, pictures for everything!