New from Newport, TN

Thought my bike was just leaking from rear output shaft, changed seal, went for a ride and when I stopped had a puddle of oil. After further inspection it is the where the crankcase comes together on the bottom opposite the cylinder head. I have never really built or been in this type of engine. My question would be, "Is this something that I could do myself or should I let someone else do it?"

welcome man , james will probably have some input for ya ,hang out and look around

is it coming from where the 2 halfs of the cases come together , got any pics of the location?

Welcome aboard!! Pics would help a lot.

It is coming where the two halves come together. Specifically right behind where the m6 bolt is on the bottom.

Welcome.

Sorry no pics maybe try later but it will be hard to get pics because of location.

Welcome!!

Welcome!

welcome lots of good info around here , the leak it's not the drain plug is it ,if the cases need to be sealed can be a big job may want to get a good manual it will help a lot , then talk with James he will get what you need an answer your questions too .....enjoy the site

https://i.servimg.com/u/f80/18/27/13/04/oil_le14.jpg
https://i.servimg.com/u/f80/18/27/13/04/oil_le15.jpg
Here are some pics, they are taken from passenger side. In the first pic you can see the m6 bold, in the second you have to look in the mirror and you can see the oil droplet. Behind there is where it is leaking.

Welcome from Cookeville, TN

I think that may be your water pump housing , not a bad job if that's it

I went out an looked at mine it is the water pump now why do you have oil coming out of it should be coolant .

The water pump is further back, this is the most forward part of the engine at the bottom. I have a 700 which may be different then the 660. I'm pretty sure it is the crankcase halves which according to James is sealed with yamabond. Guess the question now is do I have the guts to tear into it myself. I have the service manual but was wondering about any special tools, should I go ahead and change all bearings, new oil seals, piston rings? Figure if I have to go in may as well do it all. Also was wondering about upgrading does it give you any advantage on the trail or are the upgrades mainly for speed?

the billet middle gear support is a must if you go in to it , just to get the pot metal (aluminum) shit out . me I believe don't leave anything to chance if you think it could be or go bad replace it while your there, also I love the part of go fast so you know my thoughts of mods

welcome get er done

welcome once u get to the roo of your problem theres info on mods on here or ask the fellas

Welcome to the fun

just wonder what ya found on the oil leak

Welcome.

Got all the parts from James to start, no mods other than reverse gear upgrade. Suppose to be 10 to 12 hours. I'll let you know how it goes, considering this is my first time in one of these engines.

So here is where I got to, the AC magneto rotor. I was using a puller but it seemed to have a lot more resistance than I would think. Is this normal, or is there something else I must remove to get it off?

they are like that..

Finally, got all the stuff, bolts out of the way. Any advice on getting cases apart?