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The 2-Stroke Garage => Turning Wrenches => Topic started by: Redleader on October 10, 2024, 07:00:26 PM

Title: Clutch boss wear
Post by: Redleader on October 10, 2024, 07:00:26 PM
I'm in the middle of tearing down my whole engine, and inspecting things. When I took the clutch apart, I noticed a small amount of wear on the inner clutch boss (where the fingers of the steel plates grip the inner clutch). It doesn't seem like a ton of wear, but I can see it, and feel some of it when I run my finger over it. I know this can cause the clutch plates to stick and not function correctly.
Do I need to replace the clutch boss, or would it be ok for me to smooth out the marks with some fine sandpaper? I don't remember where, but I thought I heard someone say they fixed a similar issue smoothing out the wear marks with a dremel tool.
I can try to add a picture later if need be when I get home.

This is for a 75 RD350.
Title: Re: Clutch boss wear
Post by: Striker1423 on October 10, 2024, 07:57:02 PM
If it isn't too bad just fix it with a small file. If not, replace it with a chariot clutch basket for a banshee.
Title: Re: Clutch boss wear
Post by: Redleader on October 10, 2024, 08:42:08 PM
Thanks. I took a quick look at Chariot and was only able to find the outer basket, not the inner.
I do have some small files I can hit it with.
Out of curiosity, how much wear is too much wear?
Title: Re: Clutch boss wear
Post by: Striker1423 on October 10, 2024, 08:47:22 PM
Ohhh you want the inner basket. Ah.  Those don't usually get too worn.
Title: Re: Clutch boss wear
Post by: Redleader on October 11, 2024, 01:27:27 AM
Ya. That's what I was thought.
I ended up hitting it with a file and a little sandpaper to clean it up. I guess I will see how it works when I put it back together.
Attached are some before and after pictures. The before picture shows the worse of the wear.
(https://i.postimg.cc/WDtSfsMv/PXL-20241011-035126103.jpg) (https://postimg.cc/WDtSfsMv)

(https://i.postimg.cc/Y4VR5T3m/PXL-20241011-035135731.jpg) (https://postimg.cc/Y4VR5T3m)

(https://i.postimg.cc/Hcyzd3Zv/PXL-20241011-043658671.jpg) (https://postimg.cc/Hcyzd3Zv)
Title: Re: Clutch boss wear
Post by: m in sc on October 11, 2024, 07:12:11 AM
really not that unusual.  :twocents:
Title: Re: Clutch boss wear
Post by: 1976RD400C on October 11, 2024, 10:36:11 AM
Here's one in tough shape