swing arm

          Hi this is my swing arm from the Suzuki Hayabusa . This swing arm is not what it looks like it is full of lead and the total weight is 68KG I weigh 71KG just to put it in perspective. The purpose of all the lead is for traction on the salt. The salt has 40% les grip than tarmac and the wheel will spin in top gear no problem. In 2012 when my crew chief Richard Barks was on the salt breaking 2 land speed records the rear wheel was spinning at 180mph. have a look at you tube Richard barks Bonneville 2012 and listen to the revving engine indicating wheel spin also look at the track to see how ruff it is it’s not a smooth surface by any means. Any way back to the swing arm drill 2 holes under the back end of the arm tip it on end get an old copper kettle fill it full of lead, melt it very carefully as this is extremely dangerous,     and pour it in through the 2 holes,   this will take all day but at the end of the day you should have a 68KG arm.    Last thing is to look for cracks and heat distortion issues.