My 03' Wr450 Whines And Slaps When Shut Off.why?

I Have A 2003 Wr450, And It Had Been Running Great Until A Buddy Changed The Oil. Im Not Sure If He Overfilled Or Underfilled It, Though I Have Since Put The Right Amount Of Oil In. But Now My Bike Whines When I Ride It Almost Like A Low Pitch Whistle, And When I Shut It Off It Sound Like A Valve Or Piston Slap. I Thought It Might Be Eiter The Timing Chain Being Too Tight Or It Might Need A Valve Adjustment. Any Suggestions?

My 03' Wr450 Whines And Slaps When Shut Off

Sounds like my missus !! :lol:

Greg

I Have A 2003 Wr450, And It Had Been Running Great Until A Buddy Changed The Oil. Im Not Sure If He Overfilled Or Underfilled It, Though I Have Since Put The Right Amount Of Oil In. But Now My Bike Whines When I Ride It Almost Like A Low Pitch Whistle, And When I Shut It Off It Sound Like A Valve Or Piston Slap. I Thought It Might Be Eiter The Timing Chain Being Too Tight Or It Might Need A Valve Adjustment. Any Suggestions?

I have a 2003 WR450F and I have the Electric Starter Motor broken.

Sometime, when I kickstart and the engine doesn't start or when I switch off the engine it sounds like a piston slap.

I took it to the mechanic, check the valves and other staff, but it seems that this sound is caused by the Electric Starter Motor.

Does yours work fine? If not, that could be the cause. As you might know the 2003 model is faulty, most of the user upgrade it with the 2004 version

thank you, that might be it. What type of oils does the bike take.

thank you, that might be it. What type of oils does the bike take.

i use yama lube 20-50 because it gets pretty hot here in NM 10-40 if the temps were lower.

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