New to forum but have Twin Spark big problem

[Jappo]

Hi, Iam normally to be found on the TVR and Porsche forums but tonight I'n here becausemy Brother's 156 Twin Spark clunked to a halt om the M1 tonight after having just had new cam belts, tensioners and top end service. I wasn't there but I hear it clunked and ground to a halt and the AA mantook off the rocker covers and everything looks fine with the camlobes etc.

Anyone got any ideaswhat went wrong? Thank so much in advance for your help.

[Jappo]

Reading through the forumsI'minclined to think it's the bottom end rather than the top end.