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Clutch Screws Yamaha YCS1

  • rodss67
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Clutch Screws Yamaha YCS1 was created by rodss67

I am having an abnormally hard time loosening the pressure plate screws. I cannot get any of them loose. Maybe being 65 is catching up with me. Any ideas or suggestions?  Thanks! 
06 Aug 2022 18:33 #1

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Replied by Ht1kid on topic Clutch Screws Yamaha YCS1

Use a hand impact driver with a JIS bit works every time 
06 Aug 2022 18:45 #2

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Replied by rodss67 on topic Clutch Screws Yamaha YCS1

Thank you so much!
06 Aug 2022 18:55 #3

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Replied by RT325 on topic Clutch Screws Yamaha YCS1

Be very careful as will only be a 5mm thread not 6mm. Just me but i think a nice new sharp impact tip of the right size [& if JIS is the one, then that one] & a good T bar handle to turn it. Can see you've already slipped out but a new tip will still work just not one size undersize, gotta be 3 by the looks. I just use Koken short tips in my long 8mm T bar. A light tap to seat the tip in the screw then go for it, but push hard to stop it climbing out.
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Last edit: 06 Aug 2022 19:47 by RT325.
06 Aug 2022 19:35 #4

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Replied by rodss67 on topic Clutch Screws Yamaha YCS1

Good eye. Yes I did slip using a jis screwdriver. This is a first for me running across clutch screws that are so tight. I have bits but since I moved I cannot find them. Time to buy a new set. Thanks!
06 Aug 2022 19:46 #5

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Replied by RT325 on topic Clutch Screws Yamaha YCS1

Yes they're not tight like spring tension tight as screw fully home butted up solid to the other half of the spring post. Just be carfull re-tightening if 5mm thread like i suspect & all my DT1 early model screws had been stretched by over zealous previous owners. Unless someone's loctite'd them in--they should turn out easily once cracked free.
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06 Aug 2022 23:38 #6

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Replied by automan on topic Clutch Screws Yamaha YCS1

Torch the screws to kill the loctite. 300-400f outta do it

cliff
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07 Aug 2022 02:10 #7

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Replied by rodss67 on topic Clutch Screws Yamaha YCS1

Do they come loctited from the factory?
07 Aug 2022 19:30 #8

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Replied by MarkT on topic Clutch Screws Yamaha YCS1

Not that I've ever seen. 
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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07 Aug 2022 20:45 #9

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Replied by RT325 on topic Clutch Screws Yamaha YCS1

Nup, never seen that & not necessary anyway. Can imagine the grief that'd cause.
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07 Aug 2022 21:04 #10

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