for what its worth about this one... the strange cluncking noise was a loose rear wheel not being put on correctly and the only thing keeping the nut from comming off was the circlip.. did 9 laps of brands indy like this.....i will not name anyone as it probally wasnt him but instead the tryre fitters he used as you can imagine i was not impressed when i found out what the problem was. never mind ..water under the bridge |