Wiseco Piston I.D. help

[3putt]

Does anyone have an old Wiseco Model I.D book ? I have subject piston # 168P6 for a Penton 125 and wanting to know what it fits.  I know it is +60 over.  It has a window on the intake side just below the rings, and I suspect it for a reed valve engine.  Also wanting to know what engine the Wiseco model # 163 piston fits.   All I have is the 73 and earlier engines, both alloy and iron cylinders.   Will the same piston fit both the alloy and iron units for 73 and earlier ?   The Wiseco Web Site no longer refers to these numbers or anything that age.  I tried the obvious and called Wiseco for direction, and the young fellow I spoke to was NO HELP !!  All he would tell me was both fit Penton 125 bikes, age unknown.   When I ask if he could reference the archives for help, he told me they when out with all the old people that worked there.  Any help appreciated !   THANKS!!
Nelson McCullough

wnm

[john durrill]

Nelson,
 This may or may not help. We have a 75 Hi-Point catalog that lists pistons ( Wiseco) sold by Penton for 100's and 125's.
 They are listed buy these #'s
Old Style Penton Pistons ( Iron Barrel we believe)
Size     100cc Piston   125cc Piston
Std      137-100-00    138-125-00
.010     137-100-10    138-125-00
up to .040 over
New style Penton Piston ( aluminum cylinder I believe)
Size      100 cc         125cc          
Std       137A-100-00    137a-125-00
.020      137A-100-20    137A-125-20
up to.080 over.
Maybe Doug or Daine could shed some more light on what Wiseco #'s were use in the Iron and aluminum barrel Sachs engine Pentons.

John & Peter D.

[Larry Perkins]

That piston is a 60 over piston for a 125 KTM motor and will work in the KTM 125 in 1976-78 perhaps more.  The window is for the booster port.

Larry

[firstturn]

Larry,
  While you are doing pistons I have a KTM piston I just found.  The number is 51-30-007-304 . I don't have my books with me and was wondering what year etc.  Any help from you or anyone would be appreciated.

Ron Carbaugh

[AndyL]

Nelson,
Looks like John and Larry have the info you need but just to add to it, the Wiseco catalog (copy of a catalog) that I have lists the following for 125's:

#168 piston for "Penton Sachs 125"
#462 piston for "KTM, Penton 125 thru 1982"
#404 piston for "KTM 125 (Repl by 462)"
#397 piston for "Penton, KTM 125"

That is all I see on the 125's, no other data on specific years.



Andy

[john durrill]

Nelson,
 This may or may not help. We have a 75 Hi-Point catalog that lists pistons ( Wiseco) sold by Penton for 100's and 125's.
 They are listed buy these #'s
Old Style Penton Pistons ( Iron Barrel we believe)
Size     100cc Piston   125cc Piston
Std      137-100-00    138-125-00
.010     137-100-10    138-125-00
up to .040 over
New style Penton Piston ( aluminum cylinder I believe)
Size      100 cc         125cc          
Std       137A-100-00    137a-125-00
.020      137A-100-20    137A-125-20
up to.080 over.
Maybe Doug or Daine could shed some more light on what Wiseco #'s were use in the Iron and aluminum barrel Sachs engine Pentons.

John & Peter D.

[Larry Perkins]

That piston is a 60 over piston for a 125 KTM motor and will work in the KTM 125 in 1976-78 perhaps more.  The window is for the booster port.

Larry

[firstturn]

Larry,
  While you are doing pistons I have a KTM piston I just found.  The number is 51-30-007-304 . I don't have my books with me and was wondering what year etc.  Any help from you or anyone would be appreciated.

Ron Carbaugh

[AndyL]

Nelson,
Looks like John and Larry have the info you need but just to add to it, the Wiseco catalog (copy of a catalog) that I have lists the following for 125's:

#168 piston for "Penton Sachs 125"
#462 piston for "KTM, Penton 125 thru 1982"
#404 piston for "KTM 125 (Repl by 462)"
#397 piston for "Penton, KTM 125"

That is all I see on the 125's, no other data on specific years.



Andy

[3putt]

To John, Larry, and Andy;  Thanks for your input.  I guess safe way is to keep an old one available for comparison if you can get your hands on a potential replacement.  Always keeping eyes open for a back-up when it comes along.  Best Wishes,   Nelson

wnm