Apollo 250RX db-36 front and/or rear sprocket changes for torque & part selection

Apollo250RX · 03-23-2020, 12:33 AM

I want to change hearing for more torque and less top end.
I clocked the bike at 62 wide open.
I would like more low end torque.
Where can I buy compatible sprockets for the 250rx Zongshen ?

Should I go to a 13t front and keep the stock rear?
Can I do that and keep the stock size chain?
I want to lose topspeed a little, and only gain a little torque.
Please chime in.
Because I believe the parts availability limit the gear ratios.
I don't know.
Do other make bike sprockets work?

Please let me know.

I'm also wanting to change the rear strut.
Hopefully just a part swap if possible.

Douglass · 03-23-2020, 07:53 PM

Here you go.

http://www.chinariders.net/showthread.php?t=20620

Apollo250RX · 03-25-2020, 03:38 PM

Don't want to go custom.
I read that article. Good information.
But
I was asking if there are sprockets from other makes that I can use.
I haven't seen anything concrete about that.
Once I know it's not possible to use sprockets from other makes then I will go custom.
Thanks

**JerryHawk250** · 03-25-2020, 04:19 PM

It's the same center hole and bolt pattern as the Hawk but only available in 428 and 520. You will have to get custom made for the 530. I've ordered a custom sprocket from these guys and was shocked how quick i got it and wasn't that expensive either. https://shop.pbisprockets.com/product.sc?productId=503

Kawboy · 05-05-2020, 11:11 PM

2019 Apollo 250RX Wanting more torque, looking to get a larger rear sprocket roughly 50-52 tooth. Is there solid measurement for this sprocket to go through PBI to have a custom one made ?

Its_not_a_honda · 05-06-2020, 04:59 AM

Just buy this front sprocket. Put it on, adjust the chain, and ride. This is like adding 10 teeth to the rear.
http://store.orionmotors.nl//product...oducts_id=1256

Kawboy · 05-14-2020, 08:22 PM

I have installed a 52 tooth sprocket on the rear, I’ve cut back the lower chain guide to where the sprocket doesn’t run against it. My question in relation to this is that when rotating the wheel I feel the degree the chain runs off of it and into the teeth of the rear sprocket is causing excessive vibration(significant bounce when chain leaves the lower guide). Will this be fine or should I remove the guide all together.

03-25-2020, 04:19 PM	#4
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	It's the same center hole and bolt pattern as the Hawk but only available in 428 and 520. You will have to get custom made for the 530. I've ordered a custom sprocket from these guys and was shocked how quick i got it and wasn't that expensive either. https://shop.pbisprockets.com/product.sc?productId=503 __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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05-06-2020, 04:59 AM	#6
Its_not_a_honda Join Date: Jan 2018 Posts: 410	Just buy this front sprocket. Put it on, adjust the chain, and ride. This is like adding 10 teeth to the rear. http://store.orionmotors.nl//product...oducts_id=1256 __________________ 2020 Kawasaki KLX300R, 2018 Yamaha TW200 If you want more of something, tax it less. If you want less of something, tax it more.
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03-23-2020, 07:53 PM	#2
Douglass Join Date: Aug 2017 Location: Bay Area, CA Posts: 375	Here you go. http://www.chinariders.net/showthread.php?t=20620
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03-25-2020, 03:38 PM	#3
Apollo250RX Join Date: Mar 2020 Posts: 2	Don't want to go custom. I read that article. Good information. But I was asking if there are sprockets from other makes that I can use. I haven't seen anything concrete about that. Once I know it's not possible to use sprockets from other makes then I will go custom. Thanks
	0

05-05-2020, 11:11 PM	#5
Kawboy Join Date: May 2020 Posts: 2	2019 Apollo 250RX Wanting more torque, looking to get a larger rear sprocket roughly 50-52 tooth. Is there solid measurement for this sprocket to go through PBI to have a custom one made ?
	0

05-14-2020, 08:22 PM	#7
Kawboy Join Date: May 2020 Posts: 2	I have installed a 52 tooth sprocket on the rear, I’ve cut back the lower chain guide to where the sprocket doesn’t run against it. My question in relation to this is that when rotating the wheel I feel the degree the chain runs off of it and into the teeth of the rear sprocket is causing excessive vibration(significant bounce when chain leaves the lower guide). Will this be fine or should I remove the guide all together.
	0