Wr426 engine noise

1 reply to this topic
  • zvh_greatwhite

Posted October 11, 2014 - 01:19 PM


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

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  • Birdy426

Posted October 24, 2014 - 09:19 PM


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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