Z2 750 crank (Bossie the Kaw)

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23 Sep 2015 04:05 #691488 by SWest
Replied by SWest on topic Z2 750 crank (Bossie the Kaw)
Before I did this ,it wanted to bury the red line. I'd be coming up to a light at 55, it would turn yellow, I'd drop down two gears, bury the red line, power shift into second and clear the intersection before it turned red. I'd be listening for unusual noises after that. :whistle:
There is a intersection in Desperate Hot Springs with the normal red light cams and also a round bottom cam. I swear it is being controlled. I came up to it a 45, it went green,yellow,red. Just that quick. I dropped into first, grabbed a hand full and checked my mirror, the light was red. I didn't get a ticket in the mail so I must have made it. :dry:
Steve

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23 Sep 2015 05:21 #691494 by SWest
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Well, I'm about to be on my way. I can tell already I'll need that 16 tooth counter shaft sprocket. 5000 RPM at 70 just don't cut it. With the extra power I should be at 3500 at 55 and 4000 at 70 with the 16. Not many light to lights out here. I'll check back in in a few hours. :whistle:
Steve

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23 Sep 2015 06:35 #691497 by Tyrell Corp
Replied by Tyrell Corp on topic Z2 750 crank (Bossie the Kaw)
Would it be feasible to skim 2.5mm off your block (without pressing the liners out to avoid distortion) and slot the cam gears to get your valves back on time? Maybe even tune for rpm power with some more valve overlap even to take advantage of the undersquare revvy motor?.

The 'unsed' part at TDC is where your compression pressure is highest, the bit at the top of the bore that isn't run in - possible problems going to the other crank now with the same rings?

1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces

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23 Sep 2015 07:12 #691503 by missionkz
Replied by missionkz on topic Z2 750 crank (Bossie the Kaw)

Tyrell Corp wrote: Would it be feasible to skim 2.5mm off your block (without pressing the liners out to avoid distortion) and slot the cam gears to get your valves back on time? Maybe even tune for rpm power with some more valve overlap even to take advantage of the undersquare revvy motor?.

The 'unsed' part at TDC is where your compression pressure is highest, the bit at the top of the bore that isn't run in - possible problems going to the other crank now with the same rings?

That brings the camshafts closer to the crankshaft sprocket.
The number of links between the two cams and the crank sprocket would be the same but my poor pea brain can see this messing up the exhaust cam timing a bit... retarding geometry?
Maybe someone else can anwser that.

Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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23 Sep 2015 10:17 #691532 by SWest
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Greetings from Phelan. Started to lose a master link as I was over the hill. At the gas station I put on a spare I had. THIS IS A BRAND NEW CHAIN. Lots of dirt bags up here scoping me out while I was working on it. As I put on my riding gear, one guy walked up looking like he wanted to talk to me. I fired her up and rode away. :angry:
Tyrell, I won't be long until I get a 903 crank. I can get new rings at Z1E for $12 a set. I have one extra set anyway. I'm serious about selling the 750 crank. I appreciate you're advice and maybe it would work for someone else. I'd love to go with a 1200 kit but would be happy with a 1105. :whistle:
Bruce, I'm experiencing the same symptoms as you. It seem if I stay at a certain RPM on the FWY, I lose the roll on power. Maybe I'm babying it too much. I know it will lean out and I have 300 miles on it now. As soon as I get to 500, I'm going to bang it through the gears and explore the red line. :woohoo:
Steve

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23 Sep 2015 10:42 #691544 by KZB2 650
Replied by KZB2 650 on topic Z2 750 crank (Bossie the Kaw)
Lucky you noticed the master link could a made for a bad day ....... I ran one for years but this time I had my local repair shop peen the master link on for me just in case...... was a pain removing the swing arm but not really that bad......1105 that gets me excited just thinking about it. :cheer:

Had a buddy snap his chain when we were kids on his new 160 Honda and it rapped up and cracked the bottom case..... we were 15 and it brought a tear to his eyes (can't blame him) ...... his dad helped him out and the bike shop replaced it for 160 bucks a dollar a cc. (1965 prices)

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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23 Sep 2015 10:56 #691549 by SWest
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These bikes have a cage around the counter-shaft sprocket. I put the little cover back on after all these years. I'll bet that's what kept it together at speed. I noticed a clunking and knew right off what it was as I was stopping :pinch: . I had a chain roll out the back years ago. If it wrapes up in the rear wheel, it could be deadly. Like the boy scouts say, "be prepared." B)
Steve

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23 Sep 2015 11:02 #691551 by 531blackbanshee
Replied by 531blackbanshee on topic Z2 750 crank (Bossie the Kaw)
a lil safety wire wrapped around the masterlink will insure the clip goes "nowhere"!





leon

skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!

billybiltit.blogspot.com/

www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work

kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0
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23 Sep 2015 11:03 - 23 Sep 2015 11:07 #691552 by Tyrell Corp
Replied by Tyrell Corp on topic Z2 750 crank (Bossie the Kaw)
Mission ,correct, it would alter the cam timing - the 'slotted' cam sprockets allow you to set the valve timing just where you want it,within reason.

Steve, I always use endless chains now, a pain if you have a braced swinging arm but seeems essential on a 100 horsepower plus bike.

My GPz run out of fuel a couple of months ago, hitched a lift on my mates bike for a fuel can and his lady kept an eye on it, it was noticed a couple of dodgy sorts in a car were clocking the bike, and not in a good way GRRR :angry:

1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
Last edit: 23 Sep 2015 11:07 by Tyrell Corp.

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23 Sep 2015 11:03 #691553 by SWest

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23 Sep 2015 11:05 #691554 by 531blackbanshee
Replied by 531blackbanshee on topic Z2 750 crank (Bossie the Kaw)
the simple fact that it is wearing on "nothing".

google safety wire master link,it's been done to good effect for years on many different bikes.

leon

skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!

billybiltit.blogspot.com/

www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work

kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0
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23 Sep 2015 11:20 #691558 by SWest
Replied by SWest on topic Z2 750 crank (Bossie the Kaw)

Tyrell Corp wrote: Mission -the 'slotted' cam sprockets allow you to set the valve timing just where you want it.

Steve, I always use endless chains now, a pain if you have a braced swinging arm but seeems essential on a 100 horsepower plus bike.

My GPz run out of fuel a couple of months ago, hitched a lift on my mates bike for a fuel can and his lady kept an eye on it, it was noticed a couple of dodgy sorts in a car were clocking the bike, and not in a good way GRRR


I have a tire buddy in my side box.


A few well placed shots will make for some flake's F'd up day. :evil:
Can we say broken wrists and a nasty gash over the eyes? :whistle:
Steve
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