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#31 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Here are the specs for the Yamaha, TW200 engine: 67.0mm Bore x 55.7mm Stroke
This information is incorrect; I made an error. :oops: It appears Zongshen kept the TW200 engine bore, and increased the stroke to gain the extra 34cc engine displacement. ![]() ![]() ![]() This is the correct information; therefore, I have edited this post. ![]() It appears the ZS250GS is basically a Yamaha XT200/TW200 engine, with a larger bore. It seems Zongshen enlarged the cylinder bore 5.5mm in diameter to gain the extra 34cc engine displacement. Therefore, Zongshen is using a larger piston, and larger piston rings than the Yamaha motorcycles employing this engine block. Also, Zongshen enlarged the cylinder head, and relocated the exhaust port on the right side, instead of the left side. ![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#32 | |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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Quote:
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#33 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Bill, you might find some useful information reading the threads on the Sportbikes Forum at ZongshenForum.com.
![]() http://zongshenforum.com/forum/index.php?board=5.0 Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#34 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#35 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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Thanks for the link Spud. Looks like lots of good stuff there!
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#36 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
![]() ![]() I realize you were very busy today. ![]() ![]() ![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#37 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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Never too busy for you guys. Here are your pics Spud, let me know what else you want to see.
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#38 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Thank you for the additional photos, Brother Bill.
![]() ![]() ![]() Here's the left side of a very nice, TK MV30 carburetor. ![]() ![]() Here's the lowest part, right side, of the lower, progressive shock linkage. ![]() This bike is worth a lot more than the $200 you spent, Doc. ![]() ![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#39 |
Join Date: Mar 2008
Posts: 2,436
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#40 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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This information is incorrect; I made an error. :oops:
Here's my current, best guess concerning the engine design. ![]() ![]() This is the correct information; therefore, I have edited this post. ![]() It appears the ZS250GS is basically a Yamaha XT200/TW200 engine, with a larger bore. It seems Zongshen enlarged the cylinder bore 5.5mm in diameter to gain the extra 34cc engine displacement. Therefore, Zongshen is using a larger piston, and larger piston rings than the Yamaha motorcycles employing this engine block. Also, Zongshen enlarged the cylinder head, and relocated the exhaust port on the right side, instead of the left side. ![]() If someone wished to mount this engine in a Yamaha, or Zongshen 200GY-2 frame, he might have success employing a Suzuki DR200SE, or similar, exhaust header. ![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#41 |
Join Date: Oct 2009
Location: Alberta, Canada
Posts: 3,274
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Flame switch... Sounds cool! I'm betting it's something simple but possibly hard to track down. That's how it usually works with electrical gremlins. Somebody should put out the bat signal for Lynn Edwards, bet he could shed some light on the weak spark
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#42 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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I don't have a parts manual for this motorcycle, but I'm pretty sure the stock bike has an airbox, Doc.
![]() ![]() Did you get any manuals with this bike? I believe this bike is sold with three manuals: An Owner's Manual, a Parts Manual, and a Maintenance Manual. If you wish, I can check on the availability of these manuals from Zongshen America. ![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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#43 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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I would think that if the problem was the kill switch there would be no spark, I have a weak one. I don't know. :?:
I tried putting a few cc's of gas in the cylinder and it still did not start so I think this really is a spark issue ![]() I fixed the broken rear fender and the blinkers at least though. :wink:
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#44 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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I could use the manuals, Spud.
![]() The seat is one of the most comfortable I have ever tried. This bike would be great, if it runs! I'm glad you got $200 worth of fun so far because that's what I'd sell it to you for if I can't get it going! :P LOL! ![]()
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#45 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Someone is parting out a ZS250GS on eBay, Doc. Another vendor is also selling the airbox, if you want to replace it.
![]() http://motors.shop.ebay.com/i.html?_...506.m270.l1313 http://cgi.ebay.com/ebaymotors/06-ZO...item19bb235d64 I'm happy to sell you any new parts you need, but I also want to make you aware of these used parts. ![]() Spud ![]()
__________________
Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." ![]() 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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