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Z2 750 crank (Bossie the Kaw)
- SWest
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- 10 22 2014
Steve
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- missionkz
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installed previously...
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado
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- Tyler
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Lookin good man. You are still at stock bore? 1015 Weisco's?
If I knew what I was doing all the time life wouldn't be any fun.
'80 KZ650 E 700cc, dyna ignition and coils, frame up restoration, daily driver
'81 KZ1300 A3 full restoration, custom big bore pistons, 1400cc 6 cylinder super bike
"77 KZ650 B1 - Barn Find, work in progeress
"74 Yamaha DT 400 Enduro
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- SWest
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Yeah, 1015 and 10.25/1 pistons but with the 2.5mm drop, I'll bet it's more like 9-9.5/1. Good enough for me. :whistle:
Steve
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- SWest
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missionkz wrote: Steve and a few of his buddies trying to decide if this is the crank he's been looking for to eliminate any question about the 750 crank possibly
installed previously...
:woohoo: Now that's a crank. :lol:
Steve
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- Tyrell Corp
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- "You were made as well as we could make you"
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Yeah, 1015 and 10.25/1 pistons but with the 2.5mm drop, I'll bet it's more like 9-9.5/1. Good enough for me
I think about 1 point drop in CR for every 1mm, so down about 2.5 points? 10.25 - 2.50 = 7.75
Is it 8.5: 1 standard? If your head has been skimmed at all that will get some back. If the exhaust valve timing lines are just a bit higher than the gasket face it is one indication that the head has been skimmed.
About 3% power for every point of CR, so I guess you are down less than 10 percent. They do run nice and smooth though you have noticed.
Attachment Compression_Power.gif not found
www.daytona-sensors.com/tech_tuning.html
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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- SWest
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Steve
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- KZB2 650
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Whoops too slow. :laugh:
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
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- SWest
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Tyrell Corp wrote: What's the deck height on that :laugh: Some of these marine deisel engines are the size of a block of flats, quite amazing really.
Yeah, 1015 and 10.25/1 pistons but with the 2.5mm drop, I'll bet it's more like 9-9.5/1. Good enough for me
I think about 1 point drop in CR for every 1mm, so down about 2.5 points? 10.25 - 2.50 = 7.75
Is it 8.5: 1 standard? If your head has been skimmed at all that will get some back. If the exhaust valve timing lines are just a bit higher than the gasket face it is one indication that the head has been skimmed.
About 3% power for every point of CR, so I guess you are down less than 10 percent. They do run nice and smooth though you have noticed.
Attachment Compression_Power.gif not found
www.daytona-sensors.com/tech_tuning.html
Looking at your chart makes me want to get a 903 crank. On the other hand, I shouldn't have any problems running regular gas. :whistle:
Steve
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- SWest
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In the end, I satisfied the question if nothing more than to myself.
Steve
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- z1kzonly
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I went out to the Bar at Lunch and burned a fatty :woohoo:swest wrote:
missionkz wrote: Steve and a few of his buddies trying to decide if this is the crank he's been looking for to eliminate any question about the 750 crank possibly
installed previously...
:woohoo: Now that's a crank. :lol:
Steve
Livin in "CheektaVegas, NY
Went thru 25 of these in 40 yrs.
I SOLD OUT! THE KAW BARN IS EMPTY.
More room for The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!
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- SWest
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Steve
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