Help with Chain Tensio Check

[bmwben]

I'm trying to check the tension on my final drive chain (not the chain in the engine; the one that goes to the rear wheel). I took off the observation plate to check the slack. When I put a screwdriver on the side of the chain under one of the rivets and push up the slack looks fine. And that makes sense; the scooter has about 8,000 miles (I bought it used). But I can get a lot more leverage if I put the screwdriver blade under the chain and push it up that way. If I do that, it looks like the slack is beyond the service limit.

So my question is which way is the correct way to check the slack?

 

[davidh]

Excellent question and I'd be curious to hear the answer. I recently replaced the chain rail, moving from a level 1 to a level 2 (you can go all the way to level 4). It's a pretty quick job and should extend the life of the final drive.

 

[bmwben]

Good idea. What is the part number for level 2?

 

[bmwben]

I bought the next three sizes up. We'll see which one works best!

 

[davidh]

Part numbers for all four stages:


Source: https://shop.maxbmw.com/fiche/DiagramsMain.aspx?vid=54688&rnd=07242017

 

[bmwben]

Thanks!