Wr426 engine noise

Hi guys

Am a new be to four strokes so some help or advice would be appreciated a bought a wr400 1998 with a 426 engine in a card board box that was in poor condition after stripping the engine it was apparent that it needed new mains and a conrod replacing so a fitted them and reassembled the engine and adjusted the valve clearances then fitted it back in to the bike it starts easy as it has a hot cam fitted but sounds very noisy from around the clutch basket side , av removed the side case to find that the basket has slight movement could this be the problem

Thanks graham

Check the splines on the end of the crank that key the primary drive gear.  Fairly common for the primary drive nut to back off and let things get loose.

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