Machining Cylinder Head
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- Spree
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Machining Cylinder Head
How much should this cost to have done? One place told me $70! What a joke. How should I go about finding a place?
'87 Elite SE50 w/65cc Polini Kit
'84 Aero NH125
'84 Aero NH80
'05 Kymco ZX50
'84 Aero NH125
'84 Aero NH80
'05 Kymco ZX50
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- CBR1000RR
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- chevyguyjay
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- Spree
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- chevyguyjay
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im not sure what the NH80 head looks like. on the spree head, i have a piece of steel about 4x4 and 3/4" thick. i drilled and tapped a hole in the center. i take the head and screw it down to the 4x4 steel plate with the fins of the head facing up. i put it on a magnetic surface grinder at work and mill the top of the head first. after i c that i milled all the fins, i flip it upside down and repeat the process. works great! i milled 5, and ended up selling 3 of them.
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- Spree
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Do you mill the fins just so that you get a flat surface on the top?chevyguyjay wrote:im not sure what the NH80 head looks like. on the spree head, i have a piece of steel about 4x4 and 3/4" thick. i drilled and tapped a hole in the center. i take the head and screw it down to the 4x4 steel plate with the fins of the head facing up. i put it on a magnetic surface grinder at work and mill the top of the head first. after i c that i milled all the fins, i flip it upside down and repeat the process. works great! i milled 5, and ended up selling 3 of them.
'87 Elite SE50 w/65cc Polini Kit
'84 Aero NH125
'84 Aero NH80
'05 Kymco ZX50
'84 Aero NH125
'84 Aero NH80
'05 Kymco ZX50
- chevyguyjay
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- chevyguyjay
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Milling enough off the top to machine the bottom won't hurt anything; it's just using the equipment you have available. When I looked at milling the head I had the same problem.
We decided to use a lathe instead, using a similar jig to hold the head by the spark plug. This appears to be how they are done in production.
We decided to use a lathe instead, using a similar jig to hold the head by the spark plug. This appears to be how they are done in production.
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Nice pics, they finish off how you do the work. Great looking heads
Are you thinking about naming a price for another run of heads?
Do you think your jig can handle Gyro heads?
Noiseguy - thanks too - the lathe jig info is good. I didn't know how folks are doing the mods and dont have the equipment but its great to find out how its properly done.
thanks!
Are you thinking about naming a price for another run of heads?
Do you think your jig can handle Gyro heads?
Noiseguy - thanks too - the lathe jig info is good. I didn't know how folks are doing the mods and dont have the equipment but its great to find out how its properly done.
thanks!
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