Oil capacity and subframe.

Ok, I forget this every time I change my oil, but what's the engine oil capacity for a 1999 yz400? I use 10/40 and I think it's two and a half quarts. Also, will the titanium subframe for a 426 fit, and if not, will a 426 airbox fit the 400 subframe? Thank you guys for your help.

1700cc (about 1.8us qt)

The subframe and airbox from a 426 should fit. Now whether the 400 airbox fits a 426 subframe......it should.

Awesome, thanks man.

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