UK Karting - Notice Board (General Karting) : Re: Chain half loose half tight

Notice Board (General Karting)

Re: Chain half loose half tight
Posted by 'itpro' on 29 Mar 2009 @ 02:55

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itproJoined: August 2001
Total Posts: 6
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Your logic is incorrect.

I CAN be BOTH (all of) you chains! If they are ALL stretched! All chains lose shape, with time.

However, there is a simple test of the axle/sprocket/carrier:

1) Get wire coat hanger and straigthen out
2) Remove chain
3) Clamp hanger to chassis with mole grips or G-Clamp or similar
4) Bend hanger until it 'points' to the TIPS of your sprocket missing them by a FRACTION of a millimetre.
4) Rotate axle and watch the gap between the teeth tips and the pointer.
5) Now make pointer align with the side of the 'troughs' BETWEEN the tips. Do the same and check the 'gap. Also' look out for any side to side 'wobble'.

If it's a BRAND NEW PERFECT CHAIN, another quick test is to mark the sprocket and the SLOWLY rotate the axle noting how the tension in the chain changes per rotation of the axle. If it gets tighter/looser in the EXACT ratio to the position of the sprocket, it's a problem with the AXLE/Sprocket/Carrier. By this I mean: if it gets tighter and looser once (or even twice) per revolution of the wheel and the tight spots show up at EXACTLY the same 'place' in the wheel rotation, you can be almost CERTAIN it's the axle/sprocket/carrier.

If it's not, it COULD be that the Crank is out of true. Howeever, having a clutch on your Max prevents us from testing it in this way.

If the crank is bent ENOUGH to do that to the chain, then you SHOULD be able to see it when you press the starter. You should be able to see the end of the crank shaft 'wobbling'.

Ian

Message Thread:

Chain half loose half tight by 'DanMax66' (29 Mar 2009 @ 0:04)

Re: Chain half loose half tight by 'glassback' (29 Mar 2009 @ 0:58)

Re: Chain half loose half tight by 'itpro' << You are here!

Re: Chain half loose half tight by 'pratty' (29 Mar 2009 @ 10:19)

Re: Chain half loose half tight by 'DanMax66' (29 Mar 2009 @ 14:30)

Re: Chain half loose half tight by 'DanMax66' (29 Mar 2009 @ 14:39)

Re: Chain half loose half tight by 'kartcollector' (29 Mar 2009 @ 20:18)

i need help aslo pleases with this by 'cosgrove78' (29 Mar 2009 @ 20:28)

Re: i need help aslo pleases with this by 'jonny85' (29 Mar 2009 @ 22:56)

no i have not.......but.... by 'cosgrove78' (29 Mar 2009 @ 23:07)

Re: no i have not.......but.... by 'jonny85' (30 Mar 2009 @ 8:24)

Cosgrove by 'itpro' (30 Mar 2009 @ 12:16)

Re: i need help aslo pleases with this by 'invisibleracing' (31 Mar 2009 @ 22:01)

Re: Chain half loose half tight by 'DanMax66' (30 Mar 2009 @ 23:09)

Re: Chain half loose half tight by 'kartcollector' (31 Mar 2009 @ 8:11)

Re: Chain half loose half tight by 'DanMax66' (31 Mar 2009 @ 22:49)

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