Harley AMF ss175 TOP END SWAP

[plagrone]

Hey guys, I'm looking at buying a 1976 ss175. Weird questions, but does anyone know if the jugs/cylinder and head off of a ss125 would be a straight swap?

 

[plagrone]

http://www.ebay.com/itm/harley-ss125-cylinder-jug-aermacchi-amf-ss-sx-125-motor-/220742294674?pt=Motorcycles_Parts_Accessories&hash=item3365441c92&vxp=mtr

http://www.ebay.com/itm/Harley-Davidson-AMF-Aermacchi-SS-175-Cylinder-SX-175-/200880013762?pt=Motorcycles_Parts_Accessories&hash=item2ec561c1c2&vxp=mtr

 

[plagrone]

It's looking like it's probably a no, but if anyone has any first hand experience that would be great

 

[Maritime]

What is the stroke on the 2 motors? I know for just a jug/piston/head swap the stroke of the 2 motors needs to be the same or really close or else then you need to change rods and or cranks too.

 

[plagrone]

Yea, not looking like its gonna work.

Bore x stroke on the 125: 56.0 x 50.0 mm (2.2 x 2.0 inches)

on the 175: 61.0 x 59.6 mm (2.4 x 2.3 inches)

 

[Maritime]

Yep if you put the 125 piston and jug on the piston rod and crank is going to try and shove the piston 9.6 mm past the head.

 

[xb33bsa]

the 175 and 250 share bottom ends hence the thick liner in a 175 barrel

 

[plagrone]

I was getting it for the old lady, and she wants smaller, but maybe I'll get it for myself and go bigger

 

[TheCoffeeGuy]

These are two of the best or Spaghetti Harley s

http://home.comcast.net/~aermacchijack/services.htm

http://www.motomacchi.com/

 

[xb33bsa]

this one is pretty good as well

http://www.aermacchi-world.de/Frameset.htm

 

[plagrone]

Ended up getting her a DT100, but I'll probably end up getting myself a 175 or 250 AMF Harley soon. Thanks for the links fellas, good reading