UK Karting - Notice Board (2-Stroke Karting) : Re: Adding weight. Lots!

Notice Board (2-Stroke Karting)

Re: Adding weight. Lots!
Posted by 'TeamPoor' on 11 Mar 2015 @ 11:03

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TeamPoorJoined: November 2012
Total Posts: 140
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WE have had to add 16KG to my sons kart to get him from just below the Junior weight to senior max lights. Wish I had the same problem in 177 - I'm about 3KG over with a load of lightening stuff on the kart.
We fixed one 2KG flat lump to the floor tray (with two M6 high tensile CSK bolts, using an M10 washer under the CSK head of the bolt, this gives a nice flat profile and you can use large M10 repair washers or form C to spread the load of the fixing into the floor tray - and it's cheap!) between the tank and the rear edge / seat, you need to get the weight as close to the centre of rotation of the kart; imagine a central point about which the kart rotates as it turns. Then imagine the difference if you stuck a weight on the extremes of the kart and then on the centre of rotation. The weight on the centre of rotation would have no 'moment of inertia' i.e. no affect on turning the kart. The weight on the extremes would need some force behind it to get it to move with the kart it is connected to. This will slow rotation of the kart - not good!
The rest - 14KG was all fitted to the seat; 4KG & 3KG lumps under the front of the seat where it rises up and there is a space between the seat and the chassis. This is a very good place to put weight as it is low down and close to the centre of rotation. Then 4KG on the side of the seat opposite to the engine to help balance the engine weight. This is low down on the side of the seat, but I have also drilled a spare fixing hole higher up the side of the seat for wet use; you can loosen the central fixing, remove the other one, spin the weight round and fix it higher up in the spare hole. The last 3KG is also on the side of the seat as the lead above for dry, but for lower grip conditions (cold etc) and to give more traction in seniormax with a small short driver) we have moved these to the top rear on the seat.
As itpro would say IT'S NOT WHAT IT LOOKS LIKE IT'S WHAT IT PERFORMS LIKE THAT MATTERS, DON'T COMPROMISE BY PUTTING THE WEIGHT IN A HANDY PLACE!!
You could mould yourself a lead lump to fit the space where you want to fit it. If you go the whole hog you can shape it to fit the seat better.
Sometimes a couple of strips of self adhesive foam tape help flat lead lumps fit / sit better against curved seats.
The CSK fixing in a bigger sized penny washer works well for fixing in seats as it's a flatter profile and if you bend / shape the washer it sits better in in curves in the seat, a bit of duct tape over the fixings to stop rubbing on the expensive race suit!

Message Thread:

Adding weight. Lots! by 'abarth595' (09 Mar 2015 @ 9:13)

Re: Adding weight. Lots! by 'goman' (09 Mar 2015 @ 9:56)

Re: Adding weight. Lots! by 'itpro' (09 Mar 2015 @ 10:53)

Re: Adding weight. Lots! by 'itpro' (09 Mar 2015 @ 10:54)

Re: Adding weight. Lots! by 'abarth595' (10 Mar 2015 @ 20:52)

Re: Adding weight. Lots! by 'itpro' (11 Mar 2015 @ 0:42)

Re: Adding weight. Lots! by 'd-i-y71' (11 Mar 2015 @ 10:48)

Re: Adding weight. Lots! by 'TeamPoor' << You are here!

Re: Adding weight. Lots! by 'PortlandBill' (13 Mar 2015 @ 12:02)

Re: Adding weight. Lots! by 'itpro' (13 Mar 2015 @ 13:19)

Re: Adding weight. Lots! by 'PortlandBill' (13 Mar 2015 @ 15:04)

Re: Adding weight. Lots! by 'TeamPoor' (13 Mar 2015 @ 15:11)

Re: Adding weight. Lots! by 'buzzinrussell' (16 Mar 2015 @ 16:44)

Re: Adding weight. Lots! by 'itpro' (16 Mar 2015 @ 17:54)

Re: Adding weight. Lots! by 'buzzinrussell' (16 Mar 2015 @ 22:00)

Re: Adding weight. Lots! by 'buzzinrussell' (16 Mar 2015 @ 22:02)

Re: Adding weight. Lots! by 'itpro' (17 Mar 2015 @ 0:09)

Re: Adding weight. Lots! by 'Traxtar' (19 Mar 2015 @ 21:52)

Re: Adding weight. Lots! by 'nholmewood' (19 Mar 2015 @ 10:36)

Re: Adding weight. Lots! by 'buzzinrussell' (19 Mar 2015 @ 22:29)

Re: Adding weight. Lots! by 'itpro' (20 Mar 2015 @ 0:23)

Re: Adding weight. Lots! by 'PortlandBill' (20 Mar 2015 @ 9:15)

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