'86 Spree Noisy Clutch?

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ddn
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'86 Spree Noisy Clutch?

Post by ddn » Mon May 21, 2018 4:03 pm

My newly restored '86 Spree is running great. Only thing is, when I let off the throttle at any speed above about 10-12mph, there's a noisy rattle that sounds like I have rocks in my exhaust (I don't - muffler was cut in half, cleaned, and re-welded.) It sounds to me like it's coming from the clutch, which is pretty much the only part I didn't replace or rebuild as it looked like it was in good shape. The noise goes away as soon as I drop below about 10-12 mph OR open the throttle. It's present at any speed above that, but only when decelerating.

Could the clutch make that racket?

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Meatball
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Re: '86 Spree Noisy Clutch?

Post by Meatball » Mon May 21, 2018 5:35 pm

A full tear-down and meticulous inspection is where Id start. Begin with easy stuff first. Start with eliminating the possibility of it being the exhaust you cut/welded. Maybe a loose internal piece. Then go with belt/pulley/clutch area. With front pulley removed, check crank for any movement/slop/play to indicate a bad bearing. Remove fan cover, fan, flywheel and stator to inspect other crank bearing and seal. Remove rear wheel to inspect drum brake assembly. Then maybe pull the rear gear cover to inspect for damaged gears or chipped teeth. Inspect all trans bearings while in there for slop or stickiness while spun. If nothing is amiss, keep digging. Remove cylinder for bore/ring/piston inspection and intake to check reeds. With all removed, give crank a manual spin test to see if it spins easy and grit-free.

If youve done all this and everything is great, take it in the woods and shoot it.
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bonesv
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Re: '86 Spree Noisy Clutch?

Post by bonesv » Mon May 21, 2018 6:39 pm

Look for signs of belt slap against the cover inside. Check belt width for out of spec. Replace if it is.
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ddn
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Re: '86 Spree Noisy Clutch?

Post by ddn » Wed May 23, 2018 3:50 am

Meatball wrote:A full tear-down and meticulous inspection is where Id start.
I rebuilt the whole scooter down to every last bolt and bearing. So I guess if it was something I was going to notice on inspection, I missed it.

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ddn
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Re: '86 Spree Noisy Clutch?

Post by ddn » Sun Jun 17, 2018 7:26 pm

Follow-up for anyone who might have something similar.

I missed the thrust washer on the driven shaft. There's quite a lot of play in that shaft without the washer, probably 5-6mm or more, so the driven shaft was machining the transmission case.

Luckily I caught it in plenty of time, cleaned it up, replaced the washer, and it's quiet as a mouse.

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Re: '86 Spree Noisy Clutch?

Post by motormike » Sun Jun 17, 2018 11:58 pm

Thanks for that update and happy for your successful repair.
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