engine i.d.

i need to identify 2 750 engines that i have,is there a place on this site that i can do that or could someone tell me where i could find this info.

Try CycleChaos.com. You might find the numbers you're looking for.

Try here. Just scroll down till you get to the 750s.

thanks onkel,i believe that will hit the spot.

dusterdude!

Be wary of the info on CycleChaos.com as that is user edited and there are many mistakes and some misinformation, particularly for the older bikes. There also is a tendency to include info from a worldwide perspective (which can be good but misleading if you are interested in North America stats). The info on Zedder.com re 750(4)'s is incomplete (none listed for the entire GPz750 line). This topic has come up before on this site with respect to 750 motors...I recall it was solved by posting the motor VIN's and comparing (interpolating) with known bikes on this site.

thanks mike,ill post my numbers tonite after i get home from work and we`ll see how that works out.

ok,i have figured out that both engines are 1981 vintage.my question now is,the engine that is supposed to be a gpz engine starts with kz750 just like the kz750 engine i have,is there a way to figure out if this actually is a gpz engine.thanks

Well, a very quick way w/out checking motor no's or looking for mild porting and polishing on the head (typical for the KZ750R1 heads (= first year GPz)) is if the motor (and I mean all of it) is painted black. If it is, then you probably have a first year GPz motor (that is, if you are convinced that both the motors are 1981 production vintage). If you are sure that both motors are definitely from 1981 year model bikes, then you cannot have a GPz motor as the first GPz750 was released in late 1981 (1982 year model).

To answer your question further, the KZ750EE motor VIN series was used in many different models from 1981 through 1988 (in Europe) and in both KZ and ZX series bikes. This makes figuring which model bike the motor went in problematical...at times we rely on whether the motor was painted or not to give us clues.

Post edited by: Mcdroid, at: 2007/10/10 11:24

Post edited by: Mcdroid, at: 2007/10/10 11:25

mike,you`ve saved me again,thanks for that.when i ran the numbers on zedder.com last nite,it fell in the 1981 year range.this motor is all black and it has the hy-vo cam chain if that is any help.

I have an original 1982 GPz750 at home and what I'll do tonight is see if my motor VIN falls in the zedder.com data base for 1981 or 1982 E models. As I mentioned in an earlier post, the GPz750 series is not included in zedder.com The problem with the KZ750EE motor series is that it is inclusive for a number of different models (note, for example, that the 1980 KZ750E frame VIN shows circa 11000 units produced but the motor series for that same bike show 24000 motors).

yea,i noticed that last nite when looked on there too,ill post the engine number off that motor when i get home and we`ll see how it compares to yours.

My 1980 or 81 Kz750E STD has a hi-vo cam chain, and the motor was painted black from the factory. I am not sure what the differences are from the GPZ motors. I do know that the later years GPZ750 motors (1984 and newer) have a different clutch actuating mechanism, that enters from the right side of the engine. All of the KZ750 engines that I have seen have the clutch mechanism on the left side, identical to the KZ650 engines.

Post edited by: apeman, at: 2007/10/10 12:45