new commer any help with 250gy-6

pete350lc · 08-20-2014, 06:24 PM

New guy from uk, congratulations on a really good forum got a skyjet 250gy-6. Bought this brand new 2 months ago any one got one or similar. Having a few teething problems with it. Currently done 150 or so miles. Still going but difficult to start n mufflet has given up 60 miles in anyone got one. Have no manual and needs an oil change. Dont know capacity and grad. Any thoughts. Pete

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pete350lc · 08-20-2014, 06:47 PM

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humanbeing · 08-20-2014, 08:25 PM

Body / electric maybe similar to http://www.chinariders.net/showthread.php?t=12780
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Engine type ? http://www.motorfans.com.cn/bbs/view...originator=yes | Model# ? "??16?FMM" http://www.motorfans.com.cn/bbs/view...originator=yes |WMI & VDS of VIN ?
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From the picture i'm guessing it's a MD33 (65.5x 62.2) clone

katoranger · 08-20-2014, 08:50 PM

Welcome. I don't know that model, but it appears to be a honda style engine.

humanbeing · 08-20-2014, 09:05 PM

Quote:

Originally Posted by katoranger

... don't know that model...

"Skyjet" seems a brand specialized to UK market. VIN is more useful to find the maker.

Weldangrind · 08-20-2014, 10:43 PM

Welcome, Pete!

Lovely bike. Please show us close-up pics of the motor, and we can guide you from there.

That muffler is really choking the motor. I'd buy a free-breathing can, like this one: http://www.chinariders.net/showthread.php?t=5974

pete350lc · 08-21-2014, 04:05 AM

The bike was real cheap, there are a fair few in uk for sale as a 125cc but very few 250cc. Originally think it was made for the australian market. That what it says on the tyres ha! Some close up of the engine. Will post engine number and close up pics when i open garage up. The mufflers baffles have released inside think spot welded in manufacture with no way of getting into the muffler to rectify other than slicing it in half and rewelding. :(

Weldangrind · 08-21-2014, 10:53 AM

Do you have access to a welder? If so, you could certainly improve upon that design. The spout that exits the existing muffler is too small to take full advantage of that motor.

humanbeing · 08-21-2014, 11:25 AM

Quote:

Originally Posted by pete350lc

...Dont know capacity and grad. Any thoughts. Pete

.

Honda MD33E http://www.ride-inc.net/file/32/data.pdf 1.2L (cover off) / 1.0L (normal oil change)
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Regular 15W40 "HDEO" works great in these engine. One of them : http://www.ebay.co.uk/itm/121320675256
http://www.calsci.com/motorcycleinfo/Consumables.html
http://www.calsci.com/motorcycleinfo/Oils1.html

pete350lc · 08-21-2014, 01:22 PM

Quote:

Do you have access to a welder? If so, you could certainly improve upon that design. The spout that exits the existing muffler is too small to take full advantage of that motor.

Never really noticed the size of the outlet but yea the one on my scooter is bigger and thats a 50cc. Thanks for the replies. I have nothing planned to alter on the bike just yet but I am being inspired by this forum to improve it.

pete350lc · 08-21-2014, 01:35 PM

Just checked Engine number 169FMM 88900054. Engine Manufacturer CHONG ZONGSHEN if that makes any sense.

SpudRider · 08-21-2014, 02:11 PM

Welcome; we are glad you joined us.

Zongshen makes good engines.

I have ridden my Zongshen engine for over 105,000 kilometers.

http://www.chinariders.net/showthread.php?t=13931

humanbeing · 08-21-2014, 04:45 PM

Zongshen CB250S (69 x 62.2) : http://item.taobao.com/item.htm?id=14176039381
http://shop68939628.taobao.com/searc...urceId=tb.item
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Different stator version: http://item.taobao.com/item.htm?id=12980694190|http://item.taobao.com/item.htm?id=21877372016
Find out it's using a AC or DC 1st if wants upgrade the CDI.
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Weldangrind · 08-21-2014, 11:59 PM

Pete, your engine is referred to as a CB200. It is an overhead cam engine, similar (but not identical) to the Honda XR200. Here's 10 pages of stuff to familiarize you: http://s.taobao.com/search?q=cb200&c...s&cat=50328008 Use Google Chrome and allow it to translate automatically. The prices you see are in Yuan.

Weldangrind · 08-22-2014, 12:03 AM

To expand on Humanbeing's oil recommendation, any 15W40 diesel oil will do nicely.

08-20-2014, 06:24 PM	#1
pete350lc Join Date: Aug 2014 Posts: 13	new commer any help with 250gy-6 New guy from uk, congratulations on a really good forum got a skyjet 250gy-6. Bought this brand new 2 months ago any one got one or similar. Having a few teething problems with it. Currently done 150 or so miles. Still going but difficult to start n mufflet has given up 60 miles in anyone got one. Have no manual and needs an oil change. Dont know capacity and grad. Any thoughts. Pete .
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08-20-2014, 06:47 PM	#2
pete350lc Join Date: Aug 2014 Posts: 13	pics of Skyjet 250gy-6 Last edited by pete350lc; 08-21-2014 at 01:31 PM.
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08-20-2014, 08:25 PM	#3
humanbeing Join Date: Mar 2008 Posts: 2,436	Body / electric maybe similar to http://www.chinariders.net/showthread.php?t=12780 --- Engine type ? http://www.motorfans.com.cn/bbs/view...originator=yes \| Model# ? "??16?FMM" http://www.motorfans.com.cn/bbs/view...originator=yes \|WMI & VDS of VIN ? --- From the picture i'm guessing it's a MD33 (65.5x 62.2) clone __________________ Last edited by humanbeing; 08-20-2014 at 09:15 PM.
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08-20-2014, 08:50 PM	#4
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Welcome. I don't know that model, but it appears to be a honda style engine. __________________ You meet the nicest people on a Honda Clone.
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08-20-2014, 10:43 PM	#6
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Welcome, Pete! Lovely bike. Please show us close-up pics of the motor, and we can guide you from there. That muffler is really choking the motor. I'd buy a free-breathing can, like this one: http://www.chinariders.net/showthread.php?t=5974 __________________ 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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08-21-2014, 04:05 AM	#7
pete350lc Join Date: Aug 2014 Posts: 13	Thanks for the replies. The bike was real cheap, there are a fair few in uk for sale as a 125cc but very few 250cc. Originally think it was made for the australian market. That what it says on the tyres ha! Some close up of the engine. Will post engine number and close up pics when i open garage up. The mufflers baffles have released inside think spot welded in manufacture with no way of getting into the muffler to rectify other than slicing it in half and rewelding. :(
	0

08-21-2014, 10:53 AM	#8
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Do you have access to a welder? If so, you could certainly improve upon that design. The spout that exits the existing muffler is too small to take full advantage of that motor. __________________ 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

08-21-2014, 01:35 PM	#11
pete350lc Join Date: Aug 2014 Posts: 13	Just checked Engine number 169FMM 88900054. Engine Manufacturer CHONG ZONGSHEN if that makes any sense.
	0

08-21-2014, 02:11 PM	#12
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Welcome; we are glad you joined us. Zongshen makes good engines. I have ridden my Zongshen engine for over 105,000 kilometers. http://www.chinariders.net/showthread.php?t=13931 __________________ 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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08-21-2014, 04:45 PM	#13
humanbeing Join Date: Mar 2008 Posts: 2,436	Zongshen CB250S (69 x 62.2) : http://item.taobao.com/item.htm?id=14176039381 http://shop68939628.taobao.com/searc...urceId=tb.item --- Different stator version: http://item.taobao.com/item.htm?id=12980694190\|http://item.taobao.com/item.htm?id=21877372016 Find out it's using a AC or DC 1st if wants upgrade the CDI. --- __________________ Last edited by humanbeing; 08-21-2014 at 07:35 PM.
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08-21-2014, 11:59 PM	#14
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Pete, your engine is referred to as a CB200. It is an overhead cam engine, similar (but not identical) to the Honda XR200. Here's 10 pages of stuff to familiarize you: http://s.taobao.com/search?q=cb200&c...s&cat=50328008 Use Google Chrome and allow it to translate automatically. The prices you see are in Yuan. __________________ 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

08-22-2014, 12:03 AM	#15
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	To expand on Humanbeing's oil recommendation, any 15W40 diesel oil will do nicely. __________________ 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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