Its held on by 4 6mm allen bolts. Plus you need to remove a couple of hoses and the throttle cable etc. Takes about 10mins to remove. Once the body is off simply clean the throttle out with some cleaning fluids and a rag. Really is very simple and should cost no more that 1/2 - 3/4 hour labour at most. £129 is quite frankly a massive rip off chap. I would go else where and save a load of green.