Cg250 transmission gear replacement?

jatgm12 · 03-29-2023, 11:15 AM

I have a 250cc engine from my shark 250 Enduro that skips a little in first gear. Is there a tutorial video about how to replace the gear in it? I actually got a set of gaskets with the cylinder head I ordered so I thought I would just go ahead and try to get the gear and replace that too.

**JerryHawk250** · 03-29-2023, 11:23 AM

This manual will help on the engine portion. https://drive.google.com/file/d/1M2O...ew?usp=sharing

Thumper · 03-29-2023, 11:40 AM

It might be the shifter that moves the gears on the driveshaft and countershaft, or the dogs that engage when moved into 1st gear position.

Replacing the gear(s) on the countershaft and/or crankshaft will be pretty low cost, but reassembling all of those can be tricky. Before you go down that road, you might consider getting a new engine. 98 Snake Eater found a couple of new engines at a bargain price. Once you have the swap done, you can take your time on the transmission repairs and possibly work on a modified engine.

Just a thought. Maybe take apart the transmission, and then attempt to put it back together before buying anything... That way, you have no skin in the game when you make the decision as to whether to just find a replacement engine for under $400 or buy the worn out/damaged parts and reassemble (you will know the difference in cost).

03-29-2023, 11:15 AM	#1
jatgm12 Join Date: Jun 2021 Posts: 28	Cg250 transmission gear replacement? I have a 250cc engine from my shark 250 Enduro that skips a little in first gear. Is there a tutorial video about how to replace the gear in it? I actually got a set of gaskets with the cylinder head I ordered so I thought I would just go ahead and try to get the gear and replace that too.
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03-29-2023, 11:23 AM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,571	This manual will help on the engine portion. https://drive.google.com/file/d/1M2O...ew?usp=sharing __________________ 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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03-29-2023, 11:40 AM	#3
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,335	It might be the shifter that moves the gears on the driveshaft and countershaft, or the dogs that engage when moved into 1st gear position. Replacing the gear(s) on the countershaft and/or crankshaft will be pretty low cost, but reassembling all of those can be tricky. Before you go down that road, you might consider getting a new engine. 98 Snake Eater found a couple of new engines at a bargain price. Once you have the swap done, you can take your time on the transmission repairs and possibly work on a modified engine. Just a thought. Maybe take apart the transmission, and then attempt to put it back together before buying anything... That way, you have no skin in the game when you make the decision as to whether to just find a replacement engine for under $400 or buy the worn out/damaged parts and reassemble (you will know the difference in cost). __________________ -2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket -NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it
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