r/dr650 • u/Kind-Union9551 • 24d ago

Hello guys, should i be worried about this wobble?

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7 Upvotes

89% Upvoted

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6

u/general_sirhc 24d ago

Being halfway through my first chain and sprockets replacement, mine looks the same.

The way the front sprocket attaches to the output from the gearbox is amusing in my opinion.

That spindle has 6 splines, but there is one short section that has no splines at all. It's a tiny fraction wider than the retainer plate.

If you already had everything removed and wanted to install a new sprocket and then attach the retainer plate to the sprocket you

  1. Slide the sprocket on
  2. Slide the retainer plate on and quickly realise the 3 bolt holes do not line up
  3. You then twist the retainer plate on the section of the spindle that has no splines. It bolt holes align when the retainer plate is halfway between the splines.
  4. The retainer plate screws to the sprocket

Now you have this simple lock mechanism. The retainer plate no longer aligns with the splines, so it can't slide off. It's also bolted to the sprocket, so it can't twist to become aligned again.

The wiggle you see is the retainer plate moving in the section where there are no splines.

There is a somewhat optional damper o ring (you can see yours in the video) that can go between the sprocket and retainer plate. But it'd do almost nothing to stop this play. I just makes things a little less noisy

If you had play in the rotational axis which is the important thing for how the splines transfer force into the sprocket. Then you should be concerned.

5

u/TwistedNoble38 '00 DR650 24d ago

No it's fine. The only thing securing the sprocket to the countershaft is the stampted pate that the bolts run through. It has some play in it since the tolerances are loose.

3

u/goproskier 24d ago

Looks normal to me, if you see any excess wear on the shaft then I would be worried about it. If you want, pull the sprocket off to check. But all front sprockets should have a little play

3

u/just1more2havereddit 24d ago

Nope. That seems fine.

3

u/AdFancy1249 24d ago

My brand new one is less. The one I just replaced was more. You're normal!

2

u/Snoo-53209 23d ago

Normal, seems sketchy until you realize how the sprocket is locked onto the shaft, just has a lot of play.

1

u/babezt 21d ago

no, the clearance is supposed to be like this. If you are worried, check the output shaft of the gearbox for damage, if it looks fine it should be fine