watco Posted October 13, 2019 Share Posted October 13, 2019 need to cut a few valve seats in my 1100 efe head, anybody got service manual handy to tell me the valve seat angles please? cheers..... Quote Link to comment
Gixer1460 Posted October 13, 2019 Share Posted October 13, 2019 Any single cut seats are usually 45 deg. Three angle cuts will be 30, 45 and 60 degrees - the smaller and bigger angles are used to regulate the 45 deg cut width - narrower for inlets and wider for exhausts for heat transfer. Beware though - the wider the seat, the more it affects airflow - usually downwards! Quote Link to comment
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