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Ticky CG

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camby
Nearly there...



Joined: 29 Nov 2005
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PostPosted: 11:58 - 26 Dec 2008    Post subject: Ticky CG Reply with quote
Hi just done the cylinder head on my cg and its really ticky and smokey Sad anyone know what causes this? seems to be running perfect other than that.

Cheers
Camby Smile
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bladerunner
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Joined: 09 Sep 2006
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PostPosted: 12:32 - 26 Dec 2008    Post subject: Reply with quote
Did you check the valve clearance after fitting? also going along the route of it's smoking badly as well..did you fit new valve seals to the new head? What were the guides like?
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camby
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Joined: 29 Nov 2005
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PostPosted: 12:41 - 26 Dec 2008    Post subject: Reply with quote
Hi yeah iv checked the clearances should I beable to get the feeler gauge right under?
The valve seals were in it (second hand head)
Guides look fine, its had a new piston and rings aswel..
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bladerunner
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Joined: 09 Sep 2006
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PostPosted: 12:50 - 26 Dec 2008    Post subject: Reply with quote
yes the feeler gauge should be a good sliding fit but be able to pass under the adjuster. What I'm wondering is are the valve guides worn maybe not the valve seats but the guides that the valves run in? you say it smokes..has this cleared up yet(oil from rebuild getting burnt off1) or is it still doing it? If it's still doing it does it do it more on the over run ie oil being sucked past the valve stem seal
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Ichy
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Joined: 15 Jul 2005
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PostPosted: 12:53 - 26 Dec 2008    Post subject: Reply with quote
The ticking is likely to be valve clearance, either they were tight before and you never heard them or they are too big now. Is it a regular ticking that changes with revs?

Smoke might be down to oil from assembly. Otherwise the valve stems or seals are not as good as you think they are or the head gasket is leaking into the bore. Is the new piston and rings the right size? did you measure the ring gap when fitted?
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NiteMare
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Joined: 12 Sep 2008
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PostPosted: 13:26 - 26 Dec 2008    Post subject: Reply with quote
ticking could also be a gas leak where the downpipe meets the head if it hasn't been sealed properly (new gasket there ? )
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camby
Nearly there...



Joined: 29 Nov 2005
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PostPosted: 14:13 - 26 Dec 2008    Post subject: Reply with quote
Hi thanks for all th replys the ticking is fixed now still really smokey think ile just try replacing the valve seals once i figure out how to. Doubt its excess oil from the rebuild ive ran it for ages and it just keeps comming..
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Hutchysrs50
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Joined: 15 Sep 2008
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PostPosted: 14:39 - 26 Dec 2008    Post subject: Reply with quote
camby wrote:
Hi thanks for all th replys the ticking is fixed now still really smokey think ile just try replacing the valve seals once i figure out how to. Doubt its excess oil from the rebuild ive ran it for ages and it just keeps comming..


Not to sound stupid here Rolling Eyes but i dont know your bike very well.

is isnt going to be the type of 2 stroke oil your using is it? my 50cc 2 stroke used to smoke loads with this red oil i used to use Embarassed

hope this helps. Good luck fixing it.
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Xenocide
Scooby Slapper



Joined: 17 Aug 2008
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PostPosted: 15:43 - 26 Dec 2008    Post subject: Reply with quote
Hutchysrs50 wrote:
camby wrote:
Hi thanks for all th replys the ticking is fixed now still really smokey think ile just try replacing the valve seals once i figure out how to. Doubt its excess oil from the rebuild ive ran it for ages and it just keeps comming..


Not to sound stupid here Rolling Eyes but i dont know your bike very well.

is isnt going to be the type of 2 stroke oil your using is it? my 50cc 2 stroke used to smoke loads with this red oil i used to use Embarassed

hope this helps. Good luck fixing it.


CG's a 4t bud
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Hutchysrs50
World Chat Champion



Joined: 15 Sep 2008
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PostPosted: 18:59 - 26 Dec 2008    Post subject: Reply with quote
Xenocide wrote:

CG's a 4t bud


Well there is my immence knowledge for you then Smile

Thanks for letting me know Karma
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Finglonga
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Joined: 27 Jul 2004
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PostPosted: 20:40 - 26 Dec 2008    Post subject: Reply with quote
camby wrote:
Hi thanks for all th replys the ticking is fixed now still really smokey think ile just try replacing the valve seals once i figure out how to. Doubt its excess oil from the rebuild ive ran it for ages and it just keeps comming..


Does it smoke more when you first start it up than when its running? If so it's a fair sign of stem seals on the way out as the oil runs down them when the engine stops into the cylinder.

Also are you 100% sure you put the piston rings in the right order and way round?
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