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1/4 turn output shaft at sprocket 19 Aug 2020 13:54 #833230

  • 1981kz750ltd
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While preparing to replace the sprocket gaurd I noticed about a 1/4 turn back n forth on the output shaft at the sprocket. . I could feel this while riding but attributed it to the chain.
Fix? The repair manual is vague. Thanks
Tried to load a video but won't accept mp4
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1/4 turn output shaft at sprocket 19 Aug 2020 14:03 #833231

  • SWest
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There will be a little play at the countershaft. What you're feeling while riding might be the chsh rubbers are worn out.
Steve
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1/4 turn output shaft at sprocket 19 Aug 2020 15:22 #833242

  • TexasKZ
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If the transmission is in gear and the sprocket will move 1/4 turn, there is a problem. If the 750-4 clutch has rubber dampers and they have disintegrated, the output shaft might have some serious slop.
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1/4 turn output shaft at sprocket 20 Aug 2020 05:57 #833305

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My apologies. I forgot to mention this is on a 900cc engine. 1/4 turn back n forth at sprocket output shaft while in gear.

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1/4 turn output shaft at sprocket 20 Aug 2020 07:40 #833309

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1/4" or 1/4 turn? That's a lot. A video would help. I suspect it would be 1/4". Is there a lot of noise and can you pull the shaft in and out. With the sprocket tightened there should be none.
Steve

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1/4 turn output shaft at sprocket 20 Aug 2020 11:37 #833328

  • 1981kz750ltd
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I did attempt to load vid in first post. Unfortunately my camera records in mp4 which is not supported on the forum.

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1/4 turn output shaft at sprocket 20 Aug 2020 11:50 #833331

  • M_a_t_t
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You can upload it to youtube and then link it here. All it takes is a google account.
83 KZ1100A (shaft)
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81 kz650h1
81 kz750e2
90 Honda CBR600F (brother's)

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1/4 turn output shaft at sprocket 21 Aug 2020 12:08 #833412

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SWest wrote: 1/4" or 1/4 turn? That's a lot. A video would help. I suspect it would be 1/4". Is there a lot of noise and can you pull the shaft in and out. With the sprocket tightened there should be none.
Steve


In the pictures he posted, it looks like 1/4 turn. That would really worry me.
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1/4 turn output shaft at sprocket 21 Aug 2020 12:18 #833413

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1981kz750ltd wrote: My apologies. I forgot to mention this is on a 900cc engine. 1/4 turn back n forth at sprocket output shaft while in gear.


The 900 clutch has damper springs. Even if all of them were completely missing, there would not be that much slop. I bet there is something broken in the transmission. It might be time to drop the oil pan and look for chunks.
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Last edit: by TexasKZ.
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