ChinaRiders Forums - View Single Post - Poll - How fast does your 125cc go? (Vader / Razkull / etc)

prismways · 05-07-2017, 08:53 PM

So I installed the 16T sprocket and it makes a HUGE difference. I highly recommend it. Not sure I would go to 17T. I have not maxed out the RPMs yet so I don't know what the max speed is.

BTW, I think installing the new sprocket will NOT affect your speedometer because our speed sensor is in the front wheel. If it was in the transmission, then I can see that, but our speedometer should still work fine.

I bought this rear wheel lift from Harbor Freight for $26 (after 20% off) and it's great.

https://www.harborfreight.com/motorc...and-65620.html

I have to admit, putting the chain back on and making sure it had enough slack and that both sides were equal distance was challenging.

I measured the distance from the center of the bolt to the end of the swingarm on both sides to make sure they matched. I also measured the center bolt of the wheel shaft to the center bolt that is near sprocket.

I went ahead and ordered a chain alignment tool just in case. for less than $10 on amazon, you can't go wrong.

https://www.amazon.com/ABN-Alignment...alignment+tool

One mishap that I encountered was when I was putting the cover back over the sprocket, I somehow stripped the threads that held the top bolt so now my cover is only being held on by one bolt. I don't think it will go anywhere.

Here are some youtube videos for reference:

05-07-2017, 08:53 PM	#19
prismways Join Date: Apr 2017 Location: Boston area Posts: 171	So I installed the 16T sprocket and it makes a HUGE difference. I highly recommend it. Not sure I would go to 17T. I have not maxed out the RPMs yet so I don't know what the max speed is. BTW, I think installing the new sprocket will NOT affect your speedometer because our speed sensor is in the front wheel. If it was in the transmission, then I can see that, but our speedometer should still work fine. I bought this rear wheel lift from Harbor Freight for $26 (after 20% off) and it's great. https://www.harborfreight.com/motorc...and-65620.html I have to admit, putting the chain back on and making sure it had enough slack and that both sides were equal distance was challenging. I measured the distance from the center of the bolt to the end of the swingarm on both sides to make sure they matched. I also measured the center bolt of the wheel shaft to the center bolt that is near sprocket. I went ahead and ordered a chain alignment tool just in case. for less than $10 on amazon, you can't go wrong. https://www.amazon.com/ABN-Alignment...alignment+tool One mishap that I encountered was when I was putting the cover back over the sprocket, I somehow stripped the threads that held the top bolt so now my cover is only being held on by one bolt. I don't think it will go anywhere. Here are some youtube videos for reference:
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