OEM Yamaha Exhaust on 64x head

[t_dandrea]

Need some help.. In the final stages of completing my rebuild of a 98' RN Superjet. Have a 760 motor sitting on my bench with a 64x head on it. Just picked up an OEM exhaust setup. Does anyone have any experience with mounting the the 64x head? Seems like I could only get one bolt hole to line up on the top of the bracket. Does the OEM exhaust bracket bolt into the side of the cylinder just above the exhaust port?

If not possible... will I need to switch to a 64U head?

Much appreciated

 

[john zigler]

You are wanting to run a stock 701 exhaust on a 760 correct?

You will need to run a 701 head, and have the domes re-cut to match your 760 bore. You will also need to port match the exh manifold, as port heights are different between the two engines.