ChinaRiders Forums - View Single Post - 2017 Apollo 250 RX

Douglass · 02-11-2018, 11:58 AM

I just installed a new 52T sprocket. Along with it I installed a new 530 O ring Chain. The chain I purchased was a 530 o ring 120 link. I had a company named PBI Sprockets make me the sprocket. It was 80 shipped, and I had the sprocket 3 days after my order was made. It fit perfectly with no issues.

I did not change the front sprocket, and was able to keep the chain gaurd on with no modifications however it is very close to the chain, and I will be making an extension bracket for some addional clearance. This changed my gear ratio from about a 2.73 to a 3.73. The 1st gear is short but usable, but all the gears pull good. I did loose some top end, but never came close to that in the dirt, just when on the street.

* Center bore measured at 58mm
* Bolt hole size is 10.5mm
* Bolt pattern is 4 by 90mm

Sprocket link
http://www.shop.pbisprockets.com/pro...&categoryId=56

Chain link
https://www.ebay.com/itm/530-GOLD-Mo...wAAOSwH2VaA4Cn

02-11-2018, 11:58 AM	#1
Douglass Join Date: Aug 2017 Location: Bay Area, CA Posts: 375	2017 Apollo 250 RX - Sprocket install I just installed a new 52T sprocket. Along with it I installed a new 530 O ring Chain. The chain I purchased was a 530 o ring 120 link. I had a company named PBI Sprockets make me the sprocket. It was 80 shipped, and I had the sprocket 3 days after my order was made. It fit perfectly with no issues. I did not change the front sprocket, and was able to keep the chain gaurd on with no modifications however it is very close to the chain, and I will be making an extension bracket for some addional clearance. This changed my gear ratio from about a 2.73 to a 3.73. The 1st gear is short but usable, but all the gears pull good. I did loose some top end, but never came close to that in the dirt, just when on the street. * Center bore measured at 58mm * Bolt hole size is 10.5mm * Bolt pattern is 4 by 90mm Sprocket link http://www.shop.pbisprockets.com/pro...&categoryId=56 Chain link https://www.ebay.com/itm/530-GOLD-Mo...wAAOSwH2VaA4Cn Last edited by Douglass; 02-11-2018 at 03:34 PM.
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