need help please- crankshaft

shamal wrote: thanks martin, thanks Steve..

in this page: gpzweb.s3-website-us-east-1.amazonaws.co...KZZXZR550500400.html

i found this :

The KZ550D and KZ550H gpz motors are specified to have 10:1 compression and use piston part number 13001-1127.
KZ550A (standard), KZ550C (chainLTD), KZ550M (shaftLTD), KZ550F (Spectre/shaftLTD) and ZR550B (Zephyr) are specified to have 9.5:1 compression and use piston part number 13001-1121.
The Kz550A1/A2, and C1/C2, don't actually have a part number listed for the standard size piston, but do list the double over-size LL piston which is 1.00 mm (.040") over size, and has part number 13027-1053. That same part number is also used on the Kz550A3,A4,C3,C4,F1,F2, and M1, along with the Zr550B1-B4. So it is assumed the A1/A2 and C1/C2 use standard piston 13001-1121 as well.
The ZX550A motor is specified to have 10:1 compression and uses piston part number 13001-1166.
All of the 550 motors mentioned use the same crankshaft (13031-1014).
All of the 550 motors mentioned use the same connecting rods (13251-1004-JJ), but the ZR550B uses a supersede part number 13251-1004-EE.
KZ550 A3/A4, C3/C4, M, F, D, and H all have the same valves, as do the ZX550A and ZR550B.
KZ550 A1/A2 and C1/C2 have different part numbers listed for valves.
All of the 550 motors, (along with the 650, 750 and many more) use the same buckets (12032-1001) which are nominally 33mm OD. I actually measured 1.2980 inch OD on a couple examples, near the middle, and at 90 degree apart diameters.

i think it will fit.. :dry: