Rebuild of the skyjet SJ125 GY-6

satelliteone · 07-15-2013, 02:46 PM

Hi all, been a while, not long ago bought a skyjet 125. Dead cheap and on a 2008 plate. Here in the uk. using the cg125 156fmi pushrod engine.

The bike was well worn covered 12 thousand miles already. but was in dire need of repair. The engine was wobbling around in the mounts when changing gears, later on investigation the mounts had broke from the frame. I have stripped the bike down to the frame and rewelded. also one of the mounts has cracked the case at the rear, I small puddle of oil under the engine. now fixed.

Whilst the engine was out, it was stripped down, split the case, and then tig`ed.

so here is the bike, when I got it.

Been buying new bits here and there, better bars and grips, 17t front sprocket, new chain, even new valves. as the old ones were pitted due to being badly adjusted.

satelliteone · 07-15-2013, 02:47 PM

SpudRider · 07-15-2013, 02:54 PM

This is a great project!

Thank you for documenting you work with photographs, and sharing it with us.

I have moved your thread to the Dual Sport Forum where it will deservedly receive greater exposure.

satelliteone · 07-15-2013, 03:15 PM

cheeeers spud..

been doing a little more. today. the suspension is back on.

the bar risers repainted. the yokes now proper set and regreased

Weldangrind · 07-15-2013, 10:01 PM

You're really transforming that bike. I like the socket head cap screws on the rear sprocket; are they stainless?

SpudRider · 07-16-2013, 01:58 AM

You're making good progress.

satelliteone · 07-16-2013, 01:01 PM

weldngrind. aweome name.. yeah they are. replacing/upgrading as I go. any suspect bolts are changed. lockthreaded as I go too.

ta spud.

some more pix of today. engine is finished and installed. mudguard is back on.

SpudRider · 07-16-2013, 01:51 PM

We love photos; thanks for posting them.

Did you install new grips? If so, what brand?

satelliteone · 07-16-2013, 03:19 PM

using pro grip spud. ebay the all mighty parts department.. lol

http://www.ebay.co.uk/itm/NEW-GEL-TO...item337161c1c5

another evening in the spare room. just finished installing the magneto cover and front 17 tooth sprocket, original was 16 tooth. should be slightly better for cruising. awaiting the 428 130 link chain in the post. next is the brakes.

Weldangrind · 07-17-2013, 12:45 AM

Almost a whole bike again. What are you doing with the magneto cover?

As a point of interest, another fine member from the UK found an 18 tooth sprocket, but that might be a bit much for your application.

satelliteone · 07-17-2013, 06:30 AM

just refitting weld, more stainless bolts too..lol.. my new headlamp turned up in the post this morning, so new pix later today.

satelliteone · 07-17-2013, 06:46 AM

Weldangrind · 07-17-2013, 10:37 AM

I think that's the same headlight I just bought. May we see how you mounted yours?

satelliteone · 07-17-2013, 05:05 PM

when I get the camera out, I shall weld...night off for now, back on the rebuild morra

satelliteone · 07-31-2013, 02:48 PM

hi weld, they jus fit against the clocks, the two clipable rubber straps around the top of the forks.

pretty much finished the bike.

07-15-2013, 02:46 PM	#1
satelliteone Join Date: Sep 2010 Posts: 36	Rebuild of the skyjet SJ125 GY-6 Hi all, been a while, not long ago bought a skyjet 125. Dead cheap and on a 2008 plate. Here in the uk. using the cg125 156fmi pushrod engine. The bike was well worn covered 12 thousand miles already. but was in dire need of repair. The engine was wobbling around in the mounts when changing gears, later on investigation the mounts had broke from the frame. I have stripped the bike down to the frame and rewelded. also one of the mounts has cracked the case at the rear, I small puddle of oil under the engine. now fixed. Whilst the engine was out, it was stripped down, split the case, and then tig`ed. so here is the bike, when I got it. Been buying new bits here and there, better bars and grips, 17t front sprocket, new chain, even new valves. as the old ones were pitted due to being badly adjusted.
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07-15-2013, 02:54 PM	#3
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	This is a great project! Thank you for documenting you work with photographs, and sharing it with us. I have moved your thread to the Dual Sport Forum where it will deservedly receive greater exposure. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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07-15-2013, 10:01 PM	#5
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	You're really transforming that bike. I like the socket head cap screws on the rear sprocket; are they stainless? __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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07-16-2013, 01:58 AM	#6
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	You're making good progress. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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07-16-2013, 01:51 PM	#8
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	We love photos; thanks for posting them. Did you install new grips? If so, what brand? __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0

07-15-2013, 02:47 PM	#2
satelliteone Join Date: Sep 2010 Posts: 36
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07-15-2013, 03:15 PM	#4
satelliteone Join Date: Sep 2010 Posts: 36	cheeeers spud.. been doing a little more. today. the suspension is back on. the bar risers repainted. the yokes now proper set and regreased
	0

07-16-2013, 01:01 PM	#7
satelliteone Join Date: Sep 2010 Posts: 36	weldngrind. aweome name.. yeah they are. replacing/upgrading as I go. any suspect bolts are changed. lockthreaded as I go too. ta spud. some more pix of today. engine is finished and installed. mudguard is back on.
	0

07-16-2013, 03:19 PM	#9
satelliteone Join Date: Sep 2010 Posts: 36	using pro grip spud. ebay the all mighty parts department.. lol http://www.ebay.co.uk/itm/NEW-GEL-TO...item337161c1c5 another evening in the spare room. just finished installing the magneto cover and front 17 tooth sprocket, original was 16 tooth. should be slightly better for cruising. awaiting the 428 130 link chain in the post. next is the brakes.
	0

07-17-2013, 12:45 AM	#10
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Almost a whole bike again. What are you doing with the magneto cover? As a point of interest, another fine member from the UK found an 18 tooth sprocket, but that might be a bit much for your application. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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07-17-2013, 06:30 AM	#11
satelliteone Join Date: Sep 2010 Posts: 36	just refitting weld, more stainless bolts too..lol.. my new headlamp turned up in the post this morning, so new pix later today.
	0

07-17-2013, 06:46 AM	#12
satelliteone Join Date: Sep 2010 Posts: 36
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07-17-2013, 10:37 AM	#13
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I think that's the same headlight I just bought. May we see how you mounted yours? __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

07-17-2013, 05:05 PM	#14
satelliteone Join Date: Sep 2010 Posts: 36	when I get the camera out, I shall weld...night off for now, back on the rebuild morra
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07-31-2013, 02:48 PM	#15
satelliteone Join Date: Sep 2010 Posts: 36	hi weld, they jus fit against the clocks, the two clipable rubber straps around the top of the forks. pretty much finished the bike.
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