The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: WozzA on 06.02. 2012 23:14
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My A10 IRON HEAD is in need of a rebuild, the head needs new valves & guides,
any suggestions on brand? & supplier...
also.. the valve seats are in a BAD pitted condition... & need to be reground.
does anyone know how deep they can be ground to ? and what is the correct angle of grind? *work*
'57 Swingarm GOLDY
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Valves, springs and guides are available from many suppliers, I have bought several sets from C@D's in the UK and have had no problems with quality.
As to the valve seats thats hard to say without seeing them. As a basic rule if the head of the valve is lower than the surface of the head they need seat inserts. I dont know any myself but I am sure there would be plenty of engineering places in Melbourne that could do this work. You need to ask around and find somewhere that has a good reputation and works on older engines.
They will be able to fit inserts and then cut them to the correct angles. There are actually three angles involved, 60, 45 and 30 degrees. The 45 being the angle the actual valves sit against.
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Leigh from Headworks is your man. He does lots of bike stuff in Melbourne.
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*smile* thanks guys... I found this place on line & they are local to me..
I think I'll give them a try... http://www.hoppersheads.com.au/site/