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Author Topic: 91 lt250r rattle noise  (Read 1057 times)

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91 lt250r rattle noise
« on: December 31, 2013, 12:39:28 am »
ok when i start my lt250r at idle it rattle and ive heard its normal and all but it drives me **** nuts what can i do to fix it does anyone know i did notice when i rebuilt it that at the bottem of the crank rod it moved side to side not very much but could that be it ?
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Re: 91 lt250r rattle noise
« Reply #1 on: December 31, 2013, 06:26:11 am »
the rod will move side to side in the crank but up and down slop=bad  take a video of it so we can hear what you are hearing.
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Re: 91 lt250r rattle noise
« Reply #2 on: December 31, 2013, 06:39:12 am »
are all the motor mounts tight
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Re: 91 lt250r rattle noise
« Reply #3 on: December 31, 2013, 07:23:53 am »
Also, pull in the clutch lever to see if it goes away.
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Re: 91 lt250r rattle noise
« Reply #4 on: December 31, 2013, 09:20:42 am »
Did you start with a fresh bore or just honed it.
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91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

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Re: 91 lt250r rattle noise
« Reply #5 on: December 31, 2013, 12:19:58 pm »
ok so there is o up and down play and it is a resh bore .80 over
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Re: 91 lt250r rattle noise
« Reply #6 on: December 31, 2013, 01:00:55 pm »
Does it do at idle.l or a little above idle
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91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

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Re: 91 lt250r rattle noise
« Reply #7 on: December 31, 2013, 03:03:17 pm »
both at idle and when i rev it
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Re: 91 lt250r rattle noise
« Reply #8 on: December 31, 2013, 03:08:26 pm »
Does it go away when you pull in the clutch?
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Re: 91 lt250r rattle noise
« Reply #9 on: December 31, 2013, 04:24:10 pm »
Sound like piston is loose. Piston slap
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91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

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Re: 91 lt250r rattle noise
« Reply #10 on: December 31, 2013, 04:49:55 pm »
Does it sound like this?

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Re: 91 lt250r rattle noise
« Reply #11 on: December 31, 2013, 05:35:44 pm »
yes that is just what it sounds like but not as loud a little quieter here is a link to my video http://www.youtube.com/watch?v=x4Vi4Oo4GBA&feature=youtu.be
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Re: 91 lt250r rattle noise
« Reply #12 on: December 31, 2013, 06:03:17 pm »
. I would doing a tear down thats not normal  or good.
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91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

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Re: 91 lt250r rattle noise
« Reply #13 on: December 31, 2013, 07:57:49 pm »
Yea man that's definitely piston hitting something or something else hitting something else holy shite.....
I was told mine is just weak clutch dampner springs. Yours sounds like it's in the top end.
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Re: 91 lt250r rattle noise
« Reply #14 on: December 31, 2013, 09:12:11 pm »
Yea Chuck thats what mine sound like before I put a new basket in it. But this motor we listen to has a big issue.
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91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

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Re: 91 lt250r rattle noise
« Reply #15 on: December 31, 2013, 09:31:08 pm »
does it change at all when you pull clutch in tho
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Re: 91 lt250r rattle noise
« Reply #16 on: December 31, 2013, 10:25:43 pm »
Quote from: GrkGuy on December 31, 2013, 09:31:08 pm
does it change at all when you pull clutch in tho

Yeah answer this -
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Re: 91 lt250r rattle noise
« Reply #17 on: January 01, 2014, 12:39:34 pm »
If the noise goes away when you pull the clutch in, that's where you need to go.
Worn out clutch basket, clutches or bearing.
Usually, the clutch basket fingers wear, causing notches.
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Re: 91 lt250r rattle noise
« Reply #18 on: January 01, 2014, 12:41:54 pm »
Clutch basket has rivets that hold on the backing plate work loose over time also
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Re: 91 lt250r rattle noise
« Reply #19 on: January 01, 2014, 12:49:36 pm »
Correct !
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Re: 91 lt250r rattle noise
« Reply #20 on: January 01, 2014, 02:14:40 pm »
I think this problem is worse then clutch basket
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91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

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Re: 91 lt250r rattle noise
« Reply #21 on: January 05, 2014, 04:48:54 pm »
ok so iv thought abou this for a couple days and when i pull the clutch in it makes no difference but i took pictures of the cranks rod at the bottem where it moves side to side would this be it ?
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Re: 91 lt250r rattle noise
« Reply #22 on: January 05, 2014, 05:18:14 pm »
The rod will move side to side on the lower rod bearing. That is normal.

Does it move up and down?
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