Question about stroker kit for a 77 KZ 650...

Here's a 650 Drag bike running 1/4 miles times in the 8s:

More go fast advice for the 650 here: forums.kz650.info/index.php

rstnick wrote:

Here's a 650 Drag bike running 1/4 miles times in the 8s:

looks like a turbo hanging off the back,kind of hard to call that a 650 though! im guesssing the engine cases and valve cover might be stock,other than that its kind of questionable! :laugh: kind of like calling one of elmer tretts old bikes a 900/1000

PLUMMEN wrote:

Lorcan wrote:

70mm pistons using 900 liners in the 650 (or 750) block would make it 831cc.

And my little 810 will outrun most 900s

most 1428s would have a hard time keeping up with your little ol 810! :woohoo:

almost every busa and zx-14 would have a hard time keeping up with his "little" 810.

kawsakiman wrote:

PLUMMEN wrote:

Lorcan wrote:

70mm pistons using 900 liners in the 650 (or 750) block would make it 831cc.

And my little 810 will outrun most 900s

most 1428s would have a hard time keeping up with your little ol 810! :woohoo:

almost every busa and zx-14 would have a hard time keeping up with his "little" 810.

my 12R might keep up:P

yes its possible to get a stroker crank for a kz, talk to ape Jay, or David at Marine crankshaft

Yes there WAS such a thing as a 831cc kit... I have one sitting under my work bench.

MTC 70mm bore x stoke stroke... 15mm wrist pin at the proper
deck height for 650 head, piston crown profiled for 650 head.

They stopped making them about 1990... no more stock either.

injected, is the kit for sale?

rstnick wrote:

Here's a 650 Drag bike running 1/4 miles times in the 8s:

I did the lightened and chromed cranks for that bike. He couldn't make it thru ome weekend with a non chromed crank. That was before we had the nitride process available to us that we have now. No longer have to chrome those 650s.

I know this an old thread. but might I inquire as to the set up of his "lil 810" I am looking build a good high compression/ big cam/ high rpm combo for my 650. Thanks in advance for any and all info to this.

CenCalKZ wrote: I know this an old thread. but might I inquire as to the set up of his "lil 810" I am looking build a good high compression/ big cam/ high rpm combo for my 650. Thanks in advance for any and all info to this.

The "lil 810" in question is a Turbo GPZ750 that has an 810 kit IIRC. Here's a couple of links for you to study on. In this first link, the bike you are looking for belongs to Lorcan Parnell: www.750turbo.com/fastones.htm

The next link is to his forum that is dedicated to the turbo GPZ750 crowd: www.750turbo.com/forum/

Lorcan also posts here from time to time, but I haven't seen him around in a while.

Thanks a bunch for the insight and timely reply!

The aim for my 650 is as i had said, high comp, big cam, high rpm that i can ride on the street without too many issues. I know with that set-up it is asking kind of a lot. I have a very experienced and pretty well known dragbike guy helping me with frame design and engine set-up. He is rather well known on dragbike.com but i'm not sure if anyone on here would know of him. I would not surprise me if they did tho.

With all that rambling out of the way (sorry). I am really looking to build an awesome little bobber with the capability to beat any harley I come across (street legal and on pump gas of course) and as many liter bikes (or bigger) that I feel I can out ride the owner of. I am going to keep it N/A because a turbo hanging off the bike would discourage just about everyone that has any idea of what a turbo KZ is capable of... Any other tips (as too cam size, head porting specs, etc.) or tricks are greatly appreciated! Thank you.

With no turbo I'm thinking you may need a hidden bottle of laughing gas to put a hurtin' on a liter bike. Even then, that's a tall order. Rider dependent of course.