- Posts: 23021
- Thank you received: 2758
Z2 750 crank (Bossie the Kaw)
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
Steve
Please Log in or Create an account to join the conversation.
- missionkz
- Offline
- Sustaining Member
installed previously...
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado
Please Log in or Create an account to join the conversation.
- Tyler
- Offline
- User
- Posts: 845
- Thank you received: 92
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
Please Log in or Create an account to join the conversation.
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
- Posts: 23021
- Thank you received: 2758
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
Please Log in or Create an account to join the conversation.
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
- Posts: 23021
- Thank you received: 2758
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
Please Log in or Create an account to join the conversation.
- Tyrell Corp
- Offline
- User
- "You were made as well as we could make you"
- Posts: 1650
- Thank you received: 261
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
Please Log in or Create an account to join the conversation.
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
- Posts: 23021
- Thank you received: 2758
Steve
Please Log in or Create an account to join the conversation.
- KZB2 650
- Offline
- User
- Posts: 1475
- Thank you received: 265
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.
Please Log in or Create an account to join the conversation.
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
- Posts: 23021
- Thank you received: 2758
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
Please Log in or Create an account to join the conversation.
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
- Posts: 23021
- Thank you received: 2758
In the end, I satisfied the question if nothing more than to myself.
Steve
Please Log in or Create an account to join the conversation.
- z1kzonly
- Offline
- User
- Sustaining Member
- Posts: 2817
- Thank you received: 524
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!
Please Log in or Create an account to join the conversation.
- SWest
- Topic Author
- Offline
- Sustaining Member
- 10 22 2014
- Posts: 23021
- Thank you received: 2758
Steve
Please Log in or Create an account to join the conversation.