Help needed, zongshen wont fire, good spark&fuel - Page 3

b44 · 04-26-2016, 09:34 AM

Ok gents totally didn't expect this,here lies the problem
Question is do i just get piston kit? Or piston & bore kit?
Also there is good chunks of piston missing fk knows where in the crankcase?
Or is complete engine replacement better option?
Any suggestions welcome gentlemen, bearing in mind bike only cost $300 aus
Im actually not even pissed off, more wtf?
Any ideas how this could of happen on such a new bike?
Is it the obvious & no oil?
Thanks to all that had all the suggestions
Cheers

Mudflap · 04-26-2016, 10:07 AM

Ouch!

I'd either get a new engine or completely disassemble that one to check everything before ordering parts. A new piston and cylinder may be all it needs but there is possible damage to bearings, oil pump, other parts.

humanbeing · 04-26-2016, 12:26 PM

https://item.taobao.com/item.htm?id=13912286974
69mm = uses 17mm pin &

bogieboy · 04-26-2016, 12:27 PM

wellll THERE'S your problem...LOL i would reccomend a complete teardown of the engine to ensure theres no further damage, big items to check, both ends of the connecting rod... any slop there is a no go, as well as slop in any of the crank bearings, or the trans shafts. if all that is tight, i would throw a cylinder and piston at it after a gooooood long flush with brake cleaner to flush everything out.

b44 · 04-26-2016, 09:10 PM

Quote:

Originally Posted by humanbeing

https://item.taobao.com/item.htm?id=13912286974
69mm = uses 17mm pin &

Thanks human, ive measured the piston & pin it and i got 65mm & 15mm pin, is it possible to fit the bigger piston & pin?

zingshoen · 04-30-2016, 11:16 PM

oh, doesn t look too good. there s a place where you can get her bored out a few cc and then get an oversize piston, saw their chart, but forgot their name...or for a replacement cylinder try xmotos.com.au, they are in caloundra and will ship. Of course taobao is cheaper ;-) but haven t ordered from them, others here have with success.

humanbeing · 05-01-2016, 12:21 AM

65.5: https://item.taobao.com/item.htm?id=35517374143
---
Know some TB nuts around? Forwarder to AU http://item.taobao.com/item.htm?id=38321377242 can be as low as [TOLL] Y85 (1st kg), Y25 (each additional 500g)

b44 · 05-01-2016, 09:04 AM

How's everyone removing the flywheel without special tool? checked on youtube the xr200 & crf230 look different ,
Am i removing 3 hex bolts? Got crf230 service manual coming

Mudflap · 05-01-2016, 09:48 AM

Don't remove the allen head bolts, they hold the starter clutch. Screw a large bolt (forgot what size) into the threads in the center of the flywheel to pop it off the crankshaft.

humanbeing · 05-01-2016, 10:01 AM

Most vertical chonda use http://item.taobao.com/item.htm?id=15493707093 or https://item.taobao.com/item.htm?id=17291492811
If not, search other 拉码 at that shop will gives u the rough idea

zingshoen · 05-01-2016, 07:41 PM

you ll need a flywheel puller, most motobikeshop would have one for sale...like on the pic HB posted

b44 · 05-02-2016, 08:19 AM

What type of gaskit sealer is everyone using these days? I seen somewhere the oldschool rtv is not preferred became it can end up blocking oil passage ways?

Azhule · 05-02-2016, 10:27 AM

I use a "Silicone/Gasket Sealer" made by "Honda" (the car company) called:

HondaBond HT

Have never had problems with it 'breaking down' and 'plugging' oil passages in engines or transmissions.

Mudflap · 05-02-2016, 11:02 AM

I don't use any gasket sealer except for a small spot about an inch long across the crankcase seam under the cylinder base gasket. That's what Honda calls for in the factory service manuals for their small vertical engines. Honda Bond is what Honda recommends but I've always used Permatex 318 at the shop.

b44 · 05-02-2016, 11:09 AM

Is this in conjunction with the paper oem gaskits?for the life of me i can't remember if I used just straight rtv on xr500 bottom end rebuild,

04-26-2016, 12:26 PM	#33
humanbeing Join Date: Mar 2008 Posts: 2,436	https://item.taobao.com/item.htm?id=13912286974 69mm = uses 17mm pin & __________________ Last edited by humanbeing; 11-19-2017 at 02:22 PM.
	0

04-30-2016, 11:16 PM	#36
zingshoen Join Date: Jun 2009 Location: Brisbane, Queensland, Australia Posts: 648	oh, doesn t look too good. there s a place where you can get her bored out a few cc and then get an oversize piston, saw their chart, but forgot their name...or for a replacement cylinder try xmotos.com.au, they are in caloundra and will ship. Of course taobao is cheaper ;-) but haven t ordered from them, others here have with success. __________________ 1971 Garelli Gulp 50cc with open ports and 16 mm Bing Carbie + 1980 Honda XL 223 ZS + 2007 Zongshen LZX200G + DR400SM
	0

05-01-2016, 12:21 AM	#37
humanbeing Join Date: Mar 2008 Posts: 2,436	65.5: https://item.taobao.com/item.htm?id=35517374143 --- Know some TB nuts around? Forwarder to AU http://item.taobao.com/item.htm?id=38321377242 can be as low as [TOLL] Y85 (1st kg), Y25 (each additional 500g) __________________
	0

05-01-2016, 10:01 AM	#40
humanbeing Join Date: Mar 2008 Posts: 2,436	Most vertical chonda use http://item.taobao.com/item.htm?id=15493707093 or https://item.taobao.com/item.htm?id=17291492811 If not, search other 拉码 at that shop will gives u the rough idea __________________ Last edited by humanbeing; 05-01-2016 at 09:34 PM.
	0

05-01-2016, 07:41 PM	#41
zingshoen Join Date: Jun 2009 Location: Brisbane, Queensland, Australia Posts: 648	you ll need a flywheel puller, most motobikeshop would have one for sale...like on the pic HB posted __________________ 1971 Garelli Gulp 50cc with open ports and 16 mm Bing Carbie + 1980 Honda XL 223 ZS + 2007 Zongshen LZX200G + DR400SM
	0

04-26-2016, 10:07 AM	#32
Mudflap Join Date: Sep 2014 Posts: 1,870	Ouch! I'd either get a new engine or completely disassemble that one to check everything before ordering parts. A new piston and cylinder may be all it needs but there is possible damage to bearings, oil pump, other parts.
	0

04-26-2016, 12:27 PM	#34
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,043	wellll THERE'S your problem...LOL i would reccomend a complete teardown of the engine to ensure theres no further damage, big items to check, both ends of the connecting rod... any slop there is a no go, as well as slop in any of the crank bearings, or the trans shafts. if all that is tight, i would throw a cylinder and piston at it after a gooooood long flush with brake cleaner to flush everything out.
	0

05-01-2016, 09:48 AM	#39
Mudflap Join Date: Sep 2014 Posts: 1,870	Don't remove the allen head bolts, they hold the starter clutch. Screw a large bolt (forgot what size) into the threads in the center of the flywheel to pop it off the crankshaft.
	0

05-02-2016, 08:19 AM	#42
b44 Join Date: Apr 2016 Location: Australia Posts: 89	What type of gaskit sealer is everyone using these days? I seen somewhere the oldschool rtv is not preferred became it can end up blocking oil passage ways?
	0

05-02-2016, 10:27 AM	#43
Azhule Join Date: Dec 2015 Location: CO Posts: 1,525	I use a "Silicone/Gasket Sealer" made by "Honda" (the car company) called: HondaBond HT Have never had problems with it 'breaking down' and 'plugging' oil passages in engines or transmissions. __________________ "Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P.
	0

05-02-2016, 11:02 AM	#44
Mudflap Join Date: Sep 2014 Posts: 1,870	I don't use any gasket sealer except for a small spot about an inch long across the crankcase seam under the cylinder base gasket. That's what Honda calls for in the factory service manuals for their small vertical engines. Honda Bond is what Honda recommends but I've always used Permatex 318 at the shop.
	0

05-02-2016, 11:09 AM	#45
b44 Join Date: Apr 2016 Location: Australia Posts: 89	Is this in conjunction with the paper oem gaskits?for the life of me i can't remember if I used just straight rtv on xr500 bottom end rebuild,
	0