Apollo 250rx sprocket sizes ?

moto_mec · 04-24-2021, 06:46 PM

Hi, could anyone tell me what size front/rear sprockets came stock on the Apollo 250rx dirt only model? Mine is a 2019 that I bought used and it has a 12 front and 38 rear. Any help would be appreciated.

Rsrobins · 05-06-2021, 08:37 PM

Quote:

Originally Posted by moto_mec

Hi, could anyone tell me what size front/rear sprockets came stock on the Apollo 250rx dirt only model? Mine is a 2019 that I bought used and it has a 12 front and 38 rear. Any help would be appreciated.

Mine came stock with 14/38.

moto_mec · 05-07-2021, 08:33 AM

Thanks RS,appreciate it! I think I'm gonna go bigger with the rear sprocket just not enough low end grunt right now. Thanks again, Rich

OBrienx · 07-21-2021, 01:06 AM

defiantly 14/38. you can get jb acceleration kits (amazon) and other set ups online with the chain and sprockets all in one. the ones on my other bike where abused by riding terms and they're in mint shape still literally. i geared my all kinds of weird a 15 48 is good for speed and still able to pop up depending on your bike build. Another good choice is a 13 48 however is a absolute different bike if your used to a 14/38 ...lol both are worth experiencing but get a good gold mx chain for the latter.

Cheapascanb · 07-23-2021, 01:13 AM

right outta the box im gonna swap in a 12 on the front and adjust the chain. I want low end grunt on this bike. 1 tooth on the front is 2-3 on the back.

OBrienx · 07-23-2021, 03:43 AM

front makes the most difference but a lot of rear combined is also a advantage

moto_mec · 07-31-2021, 10:29 PM

Quote:

Originally Posted by Cheapascanb

right outta the box im gonna swap in a 12 on the front and adjust the chain. I want low end grunt on this bike. 1 tooth on the front is 2-3 on the back.

The 12/38 combination I have works great. I was going to go bigger on the rear but I think I'm going to leave it alone. Been messing with jetting and picking up alot more power (too lean). Right now I have 30 pilot/120 main. Purchased a crf230 exhaust system and will have to go even bigger on both jets.

OBrienx · 08-04-2021, 05:24 AM

defiantly go larger on the rear if you want more power heres a ratio index:

http://www.jtsprockets.com/fileadmin...tgearratio.pdf

im using a 120main 38 pilot with a PWK30 Carb. Great carb for low speeds and trails which is what the bike is meant for not MX but lacks the carb design doesn't work well for higher compression ratios on this engine. Mikuni carbs are great carbs for reliability and consistent power over time.

im going back to my 12 T in a few week so i can practice wheelies again.. fast riding is only fun for so long till you want snap throttle power for the more interesting way to ride a dirt bike lol

04-24-2021, 06:46 PM	#1
moto_mec Join Date: Apr 2021 Location: Pennsylvania Posts: 22	Apollo 250rx sprocket sizes ? Hi, could anyone tell me what size front/rear sprockets came stock on the Apollo 250rx dirt only model? Mine is a 2019 that I bought used and it has a 12 front and 38 rear. Any help would be appreciated.
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07-21-2021, 01:06 AM	#4
OBrienx Join Date: Jul 2021 Location: London, Ontario, Canada Posts: 30	defiantly 14/38. you can get jb acceleration kits (amazon) and other set ups online with the chain and sprockets all in one. the ones on my other bike where abused by riding terms and they're in mint shape still literally. i geared my all kinds of weird a 15 48 is good for speed and still able to pop up depending on your bike build. Another good choice is a 13 48 however is a absolute different bike if your used to a 14/38 ...lol both are worth experiencing but get a good gold mx chain for the latter. __________________ 2013 Apollo 250RX -Zong db36 233cc engine w/ titanium valves, ported exh. -WizeCo 11:1 piston -CRF230 Athena big bore cylinder -Powercore 788 Exhaust -HF K&N Pod Filter and intake -1/4 fuel lines and valves w/ plastic tank -HR handle bars and MX pully controls -CRF230 SHOWA fork -Oversized MX brakes & rotors -17T 46T (3.07 Gear ratio) JT Sprockets with a D.I.D gold MX chain -Keihin pwk30 30mm carburetor 115main/35pilot
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07-23-2021, 03:43 AM	#6
OBrienx Join Date: Jul 2021 Location: London, Ontario, Canada Posts: 30	front makes the most difference but a lot of rear combined is also a advantage __________________ 2013 Apollo 250RX -Zong db36 233cc engine w/ titanium valves, ported exh. -WizeCo 11:1 piston -CRF230 Athena big bore cylinder -Powercore 788 Exhaust -HF K&N Pod Filter and intake -1/4 fuel lines and valves w/ plastic tank -HR handle bars and MX pully controls -CRF230 SHOWA fork -Oversized MX brakes & rotors -17T 46T (3.07 Gear ratio) JT Sprockets with a D.I.D gold MX chain -Keihin pwk30 30mm carburetor 115main/35pilot
	0

08-04-2021, 05:24 AM	#8
OBrienx Join Date: Jul 2021 Location: London, Ontario, Canada Posts: 30	defiantly go larger on the rear if you want more power heres a ratio index: http://www.jtsprockets.com/fileadmin...tgearratio.pdf im using a 120main 38 pilot with a PWK30 Carb. Great carb for low speeds and trails which is what the bike is meant for not MX but lacks the carb design doesn't work well for higher compression ratios on this engine. Mikuni carbs are great carbs for reliability and consistent power over time. im going back to my 12 T in a few week so i can practice wheelies again.. fast riding is only fun for so long till you want snap throttle power for the more interesting way to ride a dirt bike lol __________________ 2013 Apollo 250RX -Zong db36 233cc engine w/ titanium valves, ported exh. -WizeCo 11:1 piston -CRF230 Athena big bore cylinder -Powercore 788 Exhaust -HF K&N Pod Filter and intake -1/4 fuel lines and valves w/ plastic tank -HR handle bars and MX pully controls -CRF230 SHOWA fork -Oversized MX brakes & rotors -17T 46T (3.07 Gear ratio) JT Sprockets with a D.I.D gold MX chain -Keihin pwk30 30mm carburetor 115main/35pilot
	0

05-07-2021, 08:33 AM	#3
moto_mec Join Date: Apr 2021 Location: Pennsylvania Posts: 22	Thanks RS,appreciate it! I think I'm gonna go bigger with the rear sprocket just not enough low end grunt right now. Thanks again, Rich
	0

07-23-2021, 01:13 AM	#5
Cheapascanb Join Date: Jul 2021 Location: Wyoming Posts: 38	right outta the box im gonna swap in a 12 on the front and adjust the chain. I want low end grunt on this bike. 1 tooth on the front is 2-3 on the back.
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