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Old 07-06-2022, 08:00 AM   #1
Nutcracker   Nutcracker is offline
 
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I completed the 14 tooth front sprocket. Same as others have mentioned I ground .05 to .06 Inch's casing. There's a lip on the casing tightly enclosing the 13 tooth factory sprocket. Any way you look at it your grinding and decreasing tolerance.

The results are good paired with the rear 42 tooth if your looking for lower RPMs at 55 to 60 mph. It tops out at 70 to 75 mph has no more power left and it feels a little unstable at high speed. But it gets to 70 good enough.. The torque curve on this engine is pretty impressive. Low end grunt in 1st gear is still respectively slow enough to craw through trail's and enough speed now to take on 2 lane roads.. I believe this is now the "cheapest" dual sport setup I could have gotten.

My kickstand bolt was very loose check yours I don't recall tightening it on assembly..

I received the MSO on the other bike and it shows Motorcycle 19HP.


 
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Old 07-06-2022, 09:14 AM   #2
Thumper   Thumper is offline
 
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Quote:
Originally Posted by Nutcracker View Post
I completed the 14 tooth front sprocket. Same as others have mentioned I ground .05 to .06 Inch's casing. There's a lip on the casing tightly enclosing the 13 tooth factory sprocket. Any way you look at it your grinding and decreasing tolerance.

...
...
Can you post photos of the grinding mod?


 
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Old 07-13-2022, 05:48 PM   #3
Thumper   Thumper is offline
 
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Which rear sprocket did you buy?

Quote:
Originally Posted by Nutcracker View Post
I completed the 14 tooth front sprocket. Same as others have mentioned I ground .05 to .06 Inch's casing. There's a lip on the casing tightly enclosing the 13 tooth factory sprocket. Any way you look at it your grinding and decreasing tolerance.

The results are good paired with the rear 42 tooth if your looking for lower RPMs at 55 to 60 mph. It tops out at 70 to 75 mph has no more power left and it feels a little unstable at high speed. But it gets to 70 good enough.. The torque curve on this engine is pretty impressive. Low end grunt in 1st gear is still respectively slow enough to craw through trail's and enough speed now to take on 2 lane roads.. I believe this is now the "cheapest" dual sport setup I could have gotten.

My kickstand bolt was very loose check yours I don't recall tightening it on assembly..

I received the MSO on the other bike and it shows Motorcycle 19HP.


 
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Old 07-13-2022, 11:33 PM   #4
Nutcracker   Nutcracker is offline
 
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Originally Posted by Thumper View Post
Which rear sprocket did you buy?
The 42 tooth from Amazon is what I like best here's a link.


JT Sprockets JTR210.42 42T Steel Rear Sprocket , black https://a.co/d/cXLPLH4

I believe you might be able to run a 38T in the rear now with the 14 front sprocket. But 1st gear would be to quick for trails in my opinion.

A link to the 38T I used..

JT Sprockets JTR897.38 38T Steel Rear Sprocket black 38 Tooth 1 https://a.co/d/8U0whlY


 
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Old 07-25-2022, 01:29 PM   #5
Huck369   Huck369 is offline
 
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Originally Posted by Thumper View Post
Which brand/model sprocket did you install? A JT? When I search for sprocket for ZS172FMM-3A, I see a few, including JTF516. I am not home to look at the sprocket. Is this it?


Attachment 27275
Yes, the JT sprocket that was posted earlier
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Old 07-25-2022, 01:50 PM   #6
AjjAxx84   AjjAxx84 is offline
 
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Originally Posted by Huck369 View Post
Yes, the JT sprocket that was posted earlier
Thank you for the info! I just ordered one from Amazon: JT Sprockets JTF270.14 14T Steel Front Sprocket , black , 14 Tooth


 
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