UK Karting - Notice Board (4-Stroke Karting) : Help! Engine wont rev out.

Notice Board (4-Stroke Karting)

Help! Engine wont rev out.
Posted by 'Partyjas' on 04 Nov 2009 @ 12:32

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PartyjasJoined: October 2009
Total Posts: 1
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I'm open to ideas on this one folks as i am running out of ideas. One of our Gx160's revs up to 6200rpm 'unloaded' as it should do, but the other one only revs to 5600rpm 'unloaded'.
Heres a lowdown on the engine - Gx160 for MSA racing.
It has 140 psi compression after a top end rebuild 1 race ago. g4 valve springs and exhaust caps / rotators on inlets. valve clearances set to .002" cold.
The coil gap is .015"
Ok.. heres what i have changed already to try and solve the problem.
Swapped the carb and plug from the other engine and fitted a brand new coil... No difference.
Oh and ive checked that the key is still in the flywheel.
Apart from pulling the cam out to check for worn lobes I really dont know what else it can be.
Any suggestions / help would be greatly appreciated.

Message Thread:

Help! Engine wont rev out. by 'Partyjas' << You are here!

Re: Help! Engine wont rev out. by 'tkmkart' (04 Nov 2009 @ 13:11)

Re: Help! Engine wont rev out. by 'lard ass bob' (04 Nov 2009 @ 17:22)

Re: Help! Engine wont rev out. by 'Partyjas' (04 Nov 2009 @ 22:02)

Re: Help! Engine wont rev out. by 'RoadRat' (04 Nov 2009 @ 22:12)

Re: Help! Engine wont rev out. by 'RoadRat' (04 Nov 2009 @ 17:43)

Re: Help! Engine wont rev out. by 'Eddy' (05 Nov 2009 @ 8:06)

Re: Help! Engine wont rev out. by 'Partyjas' (05 Nov 2009 @ 8:48)

Re: Help! Engine wont rev out. by 'Liu' (05 Nov 2009 @ 9:51)

Re: Help! Engine wont rev out. by 'Partyjas' (05 Nov 2009 @ 9:57)

Re: Help! Engine wont rev out. by 'Eddy' (06 Nov 2009 @ 8:23)

GX160 Black Magic by 'RoadRat' (06 Nov 2009 @ 9:48)

Re: GX160 Black Magic by 'Partyjas' (06 Nov 2009 @ 11:22)

Re: GX160 Black Magic by 'Eddy' (07 Nov 2009 @ 8:11)

Re: GX160 Black Magic by 'Partyjas' (09 Nov 2009 @ 8:54)

Re: GX160 Black Magic by 'Partyjas' (16 Nov 2009 @ 8:50)

Re: GX160 Black Magic by 'Jeff Johnson' (16 Nov 2009 @ 9:26)

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