Front sprocket not centered after install (Stark Varg EX) — normal or issue?

Julo EX

Julo EX

Member
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16
Location
France
Hey guys,
I swapped the stock 12T front sprocket on my Stark Varg EX for a 14T. The install went smoothly — everything seemed fine, no weird noises or chain issues. I did a short test ride and it felt perfect.

But the next day, when I looked closely, I noticed the sprocket doesn’t sit exactly in the middle — it’s slightly offset.

Is that normal when upgrading to a bigger sprocket, or should I take it off and reinstall it perfectly centered?

Thanks in advance for any advice!
 
B

Bodo

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Location
Germany
From the pictures, it's only visible that the washer is significantly off centre. Is it the correct one? When the inner bore of the washer is too big, it could move out of centre just like it does in the pictures.

It should be mechanically impossible to not center the sprocket on the shaft:
Screenshot_20251019_192359.jpg
 
Julo EX

Julo EX

Member
Likes
16
Location
France
Bodo said:
From the pictures, it's only visible that the washer is significantly off centre. Is it the correct one? When the inner bore of the washer is too big, it could move out of centre just like it does in the pictures.

It should be mechanically impossible to not center the sprocket on the shaft:
View attachment 15059
Click to expand...
I used the same washer, is there another Washer for bigger sprocket? Should I remove it and try to have It really centered?
 
B

Bodo

Member
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23
Location
Germany
Yes, opening it will reveal why it looks so odd. Stark's instruction video says to tighten it with 80Nm

(starts at 11:11)
 
4

4Corners

New member
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1
Location
AZ
How did you guys deal with the Loctite on the c/s bolt. That was the scariest bolt I've ever removed from a motorcycle and I did use heat.
 
A

AL_V

Well-known member
Likes
309
Location
Canton, Ohio
@Julo EX, I happened to change my front sprocket today.
What I found was that the bolt has a shoulder that fits the I.D. of the washer.
The shoulder is bigger than the threaded diameter of the bolt, as is the I.D. of the washer.
So it takes some care to get the shoulder of the bolt inside the washer instead of on top of it.
If you do that it will be centered, and it's not a good idea to clamp the shoulder of the bolt down on the face of the washer.
This parts picture might help:
1761356362147.png
 
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