understand

Ok - another newbie question. The 08 450 FE I bought has a 48 tooth rear sproket and either a 14 or 15 tooth on the front (I can't remember, and I'm traveling on business so I can't go count them just now). I asked the seller why he swapped the back sprocket and he said he didn't really...

I just bought a new '09 FE450. I am coming off a KTM 450EXC.(Time to sell all that orange riding gear) I am accustomed to doing my own wrenching and I had a shop manual for the KTM and the help of another website to deal with any problems that were not in the manual. I know nothing about fuel...

Lets cut off the "which oil is better" effect up front - this is not what I am looking for. My knowledge is out of date and I am trying to understand oil ratings better. My current knowledge dates back from the late 90's where SG oils were ok and the friction modifiers in these oils were not...