Performance upgrades for the CSC SG250?

ChopperCharles · 12-08-2018, 02:07 AM

I'm considering buying the CSC SG250 next year, and I'm wondering what performance mods are available for it. It's a very low compression motor to pass CARB... and I'm sure there are some more ponies to unlock. Before I go chasing performance, are there any kits or a list of what has worked for this motor before?

It's a 229cc OHV (pushrod) mill. I was thinking to start with a port/polish and deck the head, and see where that gets me, before seeing if there's a larger jug and piston that can be bolted on. Not sure if there's a cat in the exhaust, but obviously a new exhaust and intake will happen as well. Just curious what can be done with this motor.

Charles.

RedCrowRides · 12-08-2018, 08:16 AM

Try checking the Hawk Mods threads in the Dual Sport / Enduro tab, I'm fairly certain the Hawk uses the same 229cc engine and there are tons of threads there about carbs,heads, etc. Also exhausts but due to the differences in the frames / type of Bike that probably won't help much for a SG250 so maybe someone here on the Street Forum can give a link to some aftermarket exhaust they have found that will fit.

culcune · 12-08-2018, 01:49 PM

With Chinese bikes, you want to start with the carb and the exhaust, and if necessary, the gearing (many of the enduros have 50+ tooth rear sprockets, and 15 or 16 tooth countersprockets, including the SG's cousin, the TT250 which has a 17 tooth/50 tooth from stock, but my guess is the SG has street oriented gearing from stock). RedCrowRides is correct that the engine is similar to the Hawk, but is directly related to the TT250, so search for threads on that bike, but as far as basic general external mods, you will plenty of material to wade through for the Hawk.

Barnone · 12-09-2018, 09:27 AM

That is the Honda CG125 motor increased to 229cc. It is called CG250 and also 167fmm. Probably why CSC calls the bike SG250. Some carb and exhaust might help it a bit. Has a catalytic converter somewhere in the exhaust. Has an air injection system which can be removed to cleanup the engine but will yield no performance gain.

mtiberio · 07-31-2022, 08:30 AM

Anyone know the stock sprocket sizes on the 2022 SG250?
Is the rear sprocket the same as the TT250?
Will a front 17 fit with the stock unstretched chain?

12-08-2018, 02:07 AM	#1
ChopperCharles Join Date: Feb 2018 Location: RDU, NC Posts: 690	Performance upgrades for the CSC SG250? I'm considering buying the CSC SG250 next year, and I'm wondering what performance mods are available for it. It's a very low compression motor to pass CARB... and I'm sure there are some more ponies to unlock. Before I go chasing performance, are there any kits or a list of what has worked for this motor before? It's a 229cc OHV (pushrod) mill. I was thinking to start with a port/polish and deck the head, and see where that gets me, before seeing if there's a larger jug and piston that can be bolted on. Not sure if there's a cat in the exhaust, but obviously a new exhaust and intake will happen as well. Just curious what can be done with this motor. Charles.
	0

12-08-2018, 08:16 AM	#2
RedCrowRides Join Date: Jun 2018 Location: Florida Posts: 759	Try checking the Hawk Mods threads in the Dual Sport / Enduro tab, I'm fairly certain the Hawk uses the same 229cc engine and there are tons of threads there about carbs,heads, etc. Also exhausts but due to the differences in the frames / type of Bike that probably won't help much for a SG250 so maybe someone here on the Street Forum can give a link to some aftermarket exhaust they have found that will fit. __________________ 2001 Mustang GT 2004 Sportster 2018 VADER 2020 Orion RXB250L
	0

12-08-2018, 01:49 PM	#3
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,056	With Chinese bikes, you want to start with the carb and the exhaust, and if necessary, the gearing (many of the enduros have 50+ tooth rear sprockets, and 15 or 16 tooth countersprockets, including the SG's cousin, the TT250 which has a 17 tooth/50 tooth from stock, but my guess is the SG has street oriented gearing from stock). RedCrowRides is correct that the engine is similar to the Hawk, but is directly related to the TT250, so search for threads on that bike, but as far as basic general external mods, you will plenty of material to wade through for the Hawk. __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	1

07-31-2022, 08:30 AM	#5
mtiberio Join Date: Jun 2016 Location: Arlington, VA Posts: 258	Anyone know the stock sprocket sizes on the 2022 SG250? Is the rear sprocket the same as the TT250? Will a front 17 fit with the stock unstretched chain? __________________ 4 time WERA SuperVintage Roadracing National Champion, SCTA Land Speed Record Holder, 3rd AMA Motorcycle GP of Miami
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12-09-2018, 09:27 AM	#4
Barnone Join Date: Feb 2007 Posts: 1,358	That is the Honda CG125 motor increased to 229cc. It is called CG250 and also 167fmm. Probably why CSC calls the bike SG250. Some carb and exhaust might help it a bit. Has a catalytic converter somewhere in the exhaust. Has an air injection system which can be removed to cleanup the engine but will yield no performance gain.
	2