Post by bigshingle on Nov 29, 2007 10:59:05 GMT -5
Over the weekend I had to come up with a "clutch holding tool" that would do the same job as the Yamaha tool (P/No. 90890-01024.)
It took me about ½ hour and cost about $1 U.S. to make one. The Yamaha tool probably goes for more than that, and now -- not having to think things through and try different ways -- it should take less than 10 minutes to turn one out.
I'm putting a new clutch in my 500, so I took three of the old clutch plates, taped them tight together with all the cogs lined up, and drill six holes through them. Despite appearances, the steel is fairly soft and a hand drill should do the job.
I cut a 12" length of 1" by 1/8" aluminum and drilled it to line up with four of the holes in the plates and bolted everything together using washers and nuts as spacers.
It works great. No pain, no blood, no scuffing, no gouging, no breakage.
You could just as easily jam an old screwdriver into the clutch boss and wedge it against the crankcase and that might save ten minutes and the $1. I've done things like that, but it doesn't always go well, and if anything breaks it probably won't be the old screwdriver.
The boss nut is supposed to be torqued to 6.0 m-kg (43.5 ft-lb.) but for some reason when a nut is tightened to 6.0 m-kg and sits there for 27 years, even under oil, it requires a lot more force than 6.0 m-kg to loosen it. It took my impact wrench on the #4 setting to budge the nut, so it was on there nice and snug. An old screwdriver would not have been the way to go in this case.
Hope this is useful.
It took me about ½ hour and cost about $1 U.S. to make one. The Yamaha tool probably goes for more than that, and now -- not having to think things through and try different ways -- it should take less than 10 minutes to turn one out.
I'm putting a new clutch in my 500, so I took three of the old clutch plates, taped them tight together with all the cogs lined up, and drill six holes through them. Despite appearances, the steel is fairly soft and a hand drill should do the job.
I cut a 12" length of 1" by 1/8" aluminum and drilled it to line up with four of the holes in the plates and bolted everything together using washers and nuts as spacers.
It works great. No pain, no blood, no scuffing, no gouging, no breakage.
You could just as easily jam an old screwdriver into the clutch boss and wedge it against the crankcase and that might save ten minutes and the $1. I've done things like that, but it doesn't always go well, and if anything breaks it probably won't be the old screwdriver.
The boss nut is supposed to be torqued to 6.0 m-kg (43.5 ft-lb.) but for some reason when a nut is tightened to 6.0 m-kg and sits there for 27 years, even under oil, it requires a lot more force than 6.0 m-kg to loosen it. It took my impact wrench on the #4 setting to budge the nut, so it was on there nice and snug. An old screwdriver would not have been the way to go in this case.
Hope this is useful.
