UK Karting - Notice Board (4-Stroke Karting) : Re: GX160 carburettor problem

Notice Board (4-Stroke Karting)

Re: GX160 carburettor problem
Posted by 'BrianP' on 11 May 2013 @ 11:52

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BrianPJoined: August 2001
Total Posts: 41
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I think a compression check is needed...(before removing the cyl head for a decoke(decarbonising).
If you are ok with basic hand tools then removing the cyl head is easy...(as described in this article, within the tech section on here)
http://www.karting.co.uk/KandK/Tech/ReplacingGX160Conrod.html

Do compression test and post what pressures you get.
Just in case you aren't familiar with doing a compression test here's my method.
# make sure on/off switch is set to off
# remove rocker cover
# flip exhaust valve rocker off valve
# remove exh v/v rotator to save losing it
# screw comp tester into plug hole
(here's a typical tester )
http://www.ebay.co.uk/itm/Draper-Petrol-Engine-Compression-Tester-0-300Psi-0-21Bar-Free-Delivery-DRA37442-/160727810500?pt=UK_Diagnostic_Tools_Equipment&hash=item256c1fc1c4

# open throttle
# pull engine over with pull start about six times in quick succession (watch for needle climbing within gauge
# read off maximum pressure attained
# vent pressure from gauge

If below 120 then strip engine:
http://www.karting.co.uk/KandK/Tech/ReplacingGX160Conrod.html

and deglaze with a glaze buster from machine mart ( 3 legged tool fits in pistol drill and a few up and down strokes changes the bore from shiny to matt. If you do it correctly it will look like crosshatching on the bore)
# clean bore with petrol
# rebuild piston with new rings and refill with new oil
# redo comp test and post here.

Brian P.

Message Thread:

GX160 carburettor problem by 'AgedRacer' (02 May 2013 @ 19:46)

Re: GX160 carburettor problem by 'kezz99' (02 May 2013 @ 20:44)

Re: GX160 carburettor problem by 'lard ass bob' (02 May 2013 @ 21:24)

Re: GX160 carburettor problem by 'Rhauri' (03 May 2013 @ 12:43)

Re: GX160 carburettor problem by 'AgedRacer' (04 May 2013 @ 10:08)

Re: GX160 carburettor problem by 'lard ass bob' (06 May 2013 @ 9:43)

Re: GX160 carburettor problem by 'Rhauri' (06 May 2013 @ 11:05)

Re: GX160 carburettor problem by 'slipshodracing' (10 May 2013 @ 17:15)

Re: GX160 carburettor problem by 'BrianP' (10 May 2013 @ 17:56)

Re: GX160 carburettor problem by 'slipshodracing' (10 May 2013 @ 21:08)

Re: GX160 carburettor problem by 'BrianP' (10 May 2013 @ 21:46)

Re: GX160 carburettor problem by 'Eddy' (10 May 2013 @ 23:58)

Re: GX160 carburettor problem by 'slipshodracing' (11 May 2013 @ 11:26)

Re: GX160 carburettor problem by 'BrianP' << You are here!

Re: GX160 carburettor problem by 'd-i-y71' (11 May 2013 @ 12:32)

Re: GX160 carburettor problem by 'BrianP' (11 May 2013 @ 12:49)

Re: GX160 carburettor problem by 'Merry' (11 May 2013 @ 13:39)

Re: GX160 carburettor problem by 'BrianP' (11 May 2013 @ 13:50)

Re: GX160 carburettor problem by 'slipshodracing' (11 May 2013 @ 16:51)

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