Took apart my 1970 Aermacchi Harley 125cc engine and the piston is shot. I did some research and found the standard piston size is 56mm and apparently the stroke is 50mm. It is next to impossible to find a NOS piston for this engine but there are many 56mm 2 stroke pistons on ebay, most do not list stroke size. A lot of them look like they might work, but I want to be sure before I order something. Will another manufactures piston swap right in?
Will any 56mm piston work?
- Thread starter DANP
- Start date
Barnburner
Coast to Coast
Replying to keep updated - I'm looking at a 68 Rapido with the same motor. Here's a piston ring set I found on eBay http://m.ebay.com/itm/390719941042?nav=SEARCH
I saw that but I just cant justify putting a $100+ piston into a old beater trail bike.
I found these..
http://www.ebay.com/itm/1980-1981-1982-1983-Kawasaki-KE125-OEM-Piston-std-size-56mm-13001-1124-/130700674265?pt=Motorcycles_Parts_Accessories&hash=item1e6e5e04d9&vxp=mtr
http://www.ebay.com/itm/New-OEM-genuine-NOS-Honda-MT125-standard-piston-56mm-vintage-Elsinore-AHRMA-/291088286779?pt=Motorcycles_Parts_Accessories&hash=item43c636c43b&vxp=mtr
I found these..
http://www.ebay.com/itm/1980-1981-1982-1983-Kawasaki-KE125-OEM-Piston-std-size-56mm-13001-1124-/130700674265?pt=Motorcycles_Parts_Accessories&hash=item1e6e5e04d9&vxp=mtr
http://www.ebay.com/itm/New-OEM-genuine-NOS-Honda-MT125-standard-piston-56mm-vintage-Elsinore-AHRMA-/291088286779?pt=Motorcycles_Parts_Accessories&hash=item43c636c43b&vxp=mtr
Barnburner
Coast to Coast
While I can't comment on deck height or piston skirt length, I did read on a Aermacchi website that someone was able to use a Yamaha YCS1 piston. It's obviously hearsay but might be something to look into since supply of those pistons is probably way better (i.e. cheaper). I googled a spec sheet and found a number of other Yamaha bikes, including the YDS3, YDS5, DS6C, and DS6/B, had a 56mm bore x 50 mm stroke as well.
