hi every body I have this old cp 77 police from my grandp

[randy]

Hello Loud Mouse i´m sorry i not have the piston number only for reference is from honda xl185 std. year 1982.

[LOUD MOUSE]

Thanks for the info. Randy.
I have a fiche for that bike and can look it up. ..............lm

Hello Loud Mouse i´m sorry i not have the piston number only for reference is from honda xl185 std. year 1982.

[clarenceada]

According to the parts search on cycle parts Nation the parts no.'s look like this:

SkU: 13101-427-003 (Honda code 0711713) standard piston.

I looked it up and the XL1982s had bore and stroke of 63.0mm X 57.8mm and the 305 had
60.0mm X 54.0mm so... hmm. How much displacement increase would you get from a 3mm bore increase, can anybody do the math, it gives my old brain an ache.
Clarence
---------
68 305 dream
XL 185 1979

[LOUD MOUSE]

I checked with Western Hills Honda and NO pistons. ............lm

According to the parts search on cycle parts Nation the parts no.'s look like this:

SkU: 13101-427-003 (Honda code 0711713) standard piston.

I looked it up and the XL1982s had bore and stroke of 63.0mm X 57.8mm and the 305 had
60.0mm X 54.0mm so... hmm. How much displacement increase would you get from a 3mm bore increase, can anybody do the math, it gives my old brain an ache.
Clarence
---------
68 305 dream
XL 185 1979

[FIREMEDIC]

I think a 3 mm overbore on a 60 x 54 bore/stroke will give you 337 cc (bore is actually 63 cc)

[Hoosier Tom]

Beatrice Cycle sells ATC185 STD piston kits 63mm with rings and wrist pins/clips for $56 http://www.dratv.com/stdpikitaton.html
I don't know how this compares to the XL185 piston that was discussed earlier in the post.

HT