Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC: bigger bike, modern bike, or sup up my 550?

bigger bike, modern bike, or sup up my 550? 09 Jan 2019 22:25 #796467

  • Zaddict
  • Zaddict's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Enjoying my Zaddiction!
  • Posts: 217
  • Thank you received: 19
Those are the options I'm considering. I love my zr550 to death, but I've done just about every mod I can think of and I'm addicting to improving/learning/tinkering/shopping for parts/dreaming..and of course riding and enjoying the results. The only thing left to do on my 550 is a overbore/cam upgrade. I'm trying to decide if I want to do that, or level up to a bigger and/or modern bike. I'm actually leaning toward getting a bigger old school Z and doing an overbore with porting, cams, ignition, tuning etc. along with full resto-mod along the lines of Bulldock or Sanctuary builds. I'm ready and willing to drop serious cash into the project. Just need to decide which way to go...
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter
Progressive fork springs
Nitron rear shocks
Adjustable spring preloaders ....

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 10 Jan 2019 08:27 #796486

  • DoctoRot
  • DoctoRot's Avatar
  • Offline
  • Member
  • Member
  • Oh, the usual... I bowl, I drive around...
  • Posts: 1842
  • Thank you received: 300
It really all depends on you. if you want to go Fast I would look at a big KZ or more modern bike. A small displacement bike will never have the torque of a larger bike and torque is what you feel on the street. I have a few bikes, a couple of KZ's and while I love the KZs they cannot compare to my Aprilia. Its light, fast, handles great, reliable, gets good mileage. super predictable, and yet that is kind of what makes it boring to me. I have a fully built KZ1000 that every time I throw a leg over my heart starts beating faster.
that being said I'm in the process of building a hot engine for a "slow" kz750 twin, mostly because I can't leave anything stock alone but also because very few people are hot-rodding these engines. There is very little aftermarket support, and that has a certain appeal to me. I see very few ZR550s and even less with a crazy engine, so the cool factor is high.
-Vic
_________________________________
'78 kz1000 LTD long term project

'80 kz750G project
The following user(s) said Thank You: Zaddict

Please Log in or Create an account to join the conversation.

Last edit: by DoctoRot.

bigger bike, modern bike, or sup up my 550? 10 Jan 2019 10:54 #796490

  • 650Dude
  • 650Dude's Avatar
  • Offline
  • User is blocked
  • User is blocked
  • Posts: 564
  • Thank you received: 19

DoctoRot wrote: It really all depends on you. if you want to go Fast I would look at a big KZ or more modern bike. A small displacement bike will never have the torque of a larger bike and torque is what you feel on the street. I have a few bikes, a couple of KZ's and while I love the KZs they cannot compare to my Aprilia. Its light, fast, handles great, reliable, gets good mileage. super predictable, and yet that is kind of what makes it boring to me. I have a fully built KZ1000 that every time I throw a leg over my heart starts beating faster.
that being said I'm in the process of building a hot engine for a "slow" kz750 twin, mostly because I can't leave anything stock alone but also because very few people are hot-rodding these engines. There is very little aftermarket support, and that has a certain appeal to me. I see very few ZR550s and even less with a crazy engine, so the cool factor is high.


Curious, what are you doing to soup up your KZ750. I have a 77 twin and want it to go faster. Ive topped out around 105mph.
1977 Kawasaki KZ650B
1977 Kawasaki KZ750 Twin

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 10 Jan 2019 13:11 #796495

  • DoctoRot
  • DoctoRot's Avatar
  • Offline
  • Member
  • Member
  • Oh, the usual... I bowl, I drive around...
  • Posts: 1842
  • Thank you received: 300

650Dude wrote: Curious, what are you doing to soup up your KZ750. I have a 77 twin and want it to go faster. Ive topped out around 105mph.

Crank balanced by Falicon
Forged high-comp Venolia pistons (stock bore)
Port and polish
Took .050” off the head so static compression is 10.6/1
Custom cam regrind by Web Cams
Free flowing pipe by yours truely.
C5 optical ignition
At first I will run the stock BS38s but I have a rack of RS36 carbs where one carb body is ruined so I’m going to build a rack and linkage for this application using what’s there.
Right now I’m planning on running stock gearing but I may go up a tooth or two on the big sprocket so I doubt it will go over 105 before it’s redlining but it will get there in a hurry.
-Vic
_________________________________
'78 kz1000 LTD long term project

'80 kz750G project

Please Log in or Create an account to join the conversation.

Last edit: by DoctoRot.

bigger bike, modern bike, or sup up my 550? 10 Jan 2019 19:20 #796504

  • kawiwowi
  • kawiwowi's Avatar
  • Offline
  • Member
  • Member
  • Posts: 10
  • Thank you received: 3
Vic, what are you planning for the KZ 750? I have one, and love it dearly . I also have a couple of parts bikes and a ton of parts. I am thinking about building a rat bike out of the extras and would like to give it some more power. I am thinking about boring the cylinders, putting a 2 into 1 exhaust on it, rejetting the carbs, and maybe experimenting with different sprockets. Any other ideas?

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 10 Jan 2019 19:24 #796506

  • kawiwowi
  • kawiwowi's Avatar
  • Offline
  • Member
  • Member
  • Posts: 10
  • Thank you received: 3
Vic, just saw the above post after I made my post. Question : what is the C5 ignition?

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 10 Jan 2019 21:58 #796509

  • DoctoRot
  • DoctoRot's Avatar
  • Offline
  • Member
  • Member
  • Oh, the usual... I bowl, I drive around...
  • Posts: 1842
  • Thank you received: 300
C5 Performance is the only company (as far as I know) making ignitions for the KZ750 twin . www.c5ignitions.com/
After digging into the 750 twin engine I have come to the conclusion it is engineered really tamely for reliability. lots of potential for more power. some guys are getting 85 to the wheel out of these engines.

If you have any more questions about modding a 750 twin engine DM me or ask me in my project thread so we don't clutter up Z-addicts thread.
-Vic
_________________________________
'78 kz1000 LTD long term project

'80 kz750G project

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 11 Jan 2019 05:35 #796515

  • waktaylor
  • waktaylor's Avatar
  • Offline
  • Member
  • Member
  • Posts: 111
  • Thank you received: 6
Would you keep the 550?
I would like to see a properly modded ZXR1100 which would more than satisfy your power craving. First mod would be a round headlight, please.

Attachments:

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 11 Jan 2019 10:30 #796532

  • Daftrusty
  • Daftrusty's Avatar
  • Offline
  • Member
  • Member
  • Posts: 299
  • Thank you received: 124
**I am only comparing vintage bikes in this reply as you can easily buy a modern bike that has huge power and is lighter than most mountain bikes. Zaddict referenced building a restomod from a vintage bike, so that is the only thing I am comparing. The zrx is an amazing motorcycle and is always the correct answer to what big bike should I buy, but it is what I consider a modern bike for the purposes of this thread**

As an owner of a slightly modified zr550 and a very heavily modified kz750, I can only say it is not a very tough choice. Going for a larger displacement bike is the only real solution as you can only make your 550 so fast.
As I am sure you remember, I have put higher compression pistons and cams from the zx550 in my Zephyr and it was a sizable upgrade in power from stock, but even if I was to bore it out to 615 it still wouldn't give me the sensation of being pushed back that the torque of my 750 provides. That is not to say my zr550 is slow....and I would wager if I raced my two bikes against each other, that the 550 could very possibly keep up with the 750. Also note, that my zr550 is geared for lower rpm's at highway speeds, so it is technically slower than if it had stock sprockets.
I have touched on this in my build thread, but one day I went and rode my 750 and 550 back-to-back and the difference in weight and power delivery is enormous!
The zr550 is so much lighter than my kz750 ( and over 50% of my kz750 is made from a zr550!) The 550 felt so light it felt like riding a bicycle in comparison. The 550 engine so effortlessly revs to redline and just gives me a sensation of bike that can't wait to take off down the road. Kind of like an eager dog pulling against the leash because it wants to play.
The 750 is a sensation of torque that propels me forward from a stand still, but once in the higher rev's it doesn't feel all that different...except it isn't as eager to scream to the redline as the 550 is.
The 750 is very easy to maneuver and does not feel lumbering in comparison to the 550 at all. But you can instantly feel the massive weight difference between the two bikes.
I have read of many instances of folks on gpz550's holding their own against the larger displacement vintage bikes. The weight differences is what equalizes the sometime huge gaps in power output.
I honestly don't know the weight difference between the 550 and 750 engines, but it is significant. I have both a spare 550 and 750 engine sitting on rolling platforms in my garage and just pushing them around you can tell the difference in heft. I lifted my completely assembled 550 motor in to the frame once but with my 750, I could only lift the bare assembled engine cases into the frame and had to install the clutch, covers, cylinder block and head while it was in the frame. I simply can't lift an assembled 750 motor off the floor. The kz900/1000/1100 motors are even bigger in size which is reflected in the sizable difference in curb weights from the 750's.
So all that gibberish was to only illustrate, that while you can easily find a larger displacement (vintage) motorcycle that will provide years of fun, you may lose a lot of the nimbleness and "happy puppy dog" feeling the 550 provides.
That why you should keep the 550 and build a really cool 650/750/900/1000/1100 restomod.

Now that my 750 project is almost done, ( just need to finish welding up the Bassani exhaust) I am now planning to remodel my zr550 with some powder coated wheels and a different exhaust. I have to keep myself busy until I can collect all the necessary parts to start the kz650 restomod I want to do.

**Totally of subject, but I need to return to your past thread about installing zx550 cams in your Zephyr. While researching the mystery Yoshimura cams I put in my 750, I instantly realized a massive chunk of mis-information I wrote in one of my replies regarding valve overlap. Needless to say is that I'm an idiot and posted some highly erroneous information that needs to be removed.**
The following user(s) said Thank You: loudhvx

Please Log in or Create an account to join the conversation.

Last edit: by Daftrusty.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 08:09 #796583

  • waktaylor
  • waktaylor's Avatar
  • Offline
  • Member
  • Member
  • Posts: 111
  • Thank you received: 6
I follow this whole heartedly. I had a 2011 1100 hypermotard Ducati and loved it but the kz650 is just more fun.
If I can cast another vote build your kz650! I have. I don’t really like punching out the ccs on a bike for some reason it seems dishonest. Some people can build the 650 out to over 800 but it just seems like it would remove the soul of the bike.
BUT high compression and hot cams, in my opinion, simply amplify the soul!
My new vote is hot rod kz650! Attached image is my bike
Attachments:

Please Log in or Create an account to join the conversation.

Last edit: by waktaylor.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 17:20 #796626

  • Zaddict
  • Zaddict's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Enjoying my Zaddiction!
  • Posts: 217
  • Thank you received: 19

DoctoRot wrote: It really all depends on you. if you want to go Fast I would look at a big KZ or more modern bike. A small displacement bike will never have the torque of a larger bike and torque is what you feel on the street. I have a few bikes, a couple of KZ's and while I love the KZs they cannot compare to my Aprilia. Its light, fast, handles great, reliable, gets good mileage. super predictable, and yet that is kind of what makes it boring to me. I have a fully built KZ1000 that every time I throw a leg over my heart starts beating faster.
that being said I'm in the process of building a hot engine for a "slow" kz750 twin, mostly because I can't leave anything stock alone but also because very few people are hot-rodding these engines. There is very little aftermarket support, and that has a certain appeal to me. I see very few ZR550s and even less with a crazy engine, so the cool factor is high.


Good advice, thank you. I love this line: "every time I throw my leg over [my kz1000] my heart starts beating faster.' I had a brand new Audi at one point that was never as exciting to drive as the much older model I had before, though I could never figure out why. I think you're right - the modern car was just too easy/predictable!
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter
Progressive fork springs
Nitron rear shocks
Adjustable spring preloaders ....

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 17:23 #796627

  • Zaddict
  • Zaddict's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Enjoying my Zaddiction!
  • Posts: 217
  • Thank you received: 19

waktaylor wrote: Would you keep the 550?

Definitely. I'd hope to be shot out to space riding it when I die.
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter
Progressive fork springs
Nitron rear shocks
Adjustable spring preloaders ....

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 17:43 #796628

  • Zaddict
  • Zaddict's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Enjoying my Zaddiction!
  • Posts: 217
  • Thank you received: 19

Daftrusty wrote: ...while you can easily find a larger displacement (vintage) motorcycle that will provide years of fun, you may lose a lot of the nimbleness and "happy puppy dog" feeling the 550 provides.
That why you should keep the 550 and build a really cool 650/750/900/1000/1100 restomod.

Now that my 750 project is almost done, ( just need to finish welding up the Bassani exhaust) I am now planning to remodel my zr550 with some powder coated wheels and a different exhaust. I have to keep myself busy until I can collect all the necessary parts to start the kz650 restomod I want to do.

Thanks Rusty. Yeah, I think I see both bikes in my future - the 550 and a bigger bike. So maybe it's more a matter of timing than anything -- do I do the Wiseco 615 upgrade now and then eventually get the bigger bike, or get the bigger bike now (and maybe not bother suping up my 550 further). I wonder if the 615cc big bore would satisfy my hunger for a bit more power. Corey's gpz550 is putting out only 5-10 more hp more than mine, but he's getting >30% more torque (39 ft lbs vs 30 for mine).

Sound like you decided to keep your zr550. Happy to hear it. I know you were considering selling last year. So few of these cool little bikes around, they deserve loving homes ;)

Daftrusty wrote: **Totally of subject, but I need to return to your past thread about installing zx550 cams in your Zephyr. While researching the mystery Yoshimura cams I put in my 750, I instantly realized a massive chunk of mis-information I wrote in one of my replies regarding valve overlap. Needless to say is that I'm an idiot and posted some highly erroneous information that needs to be removed.**


I learned so much in that thread, would be good to update it to keep it accurate. Speaking of which, I did get the bike dyno'd but haven't updated the thread because the guys doing the tune were clowns - I don't know how much to trust the numbers. The bike ended up, according to their sketchy dynojet dyno, putting out 58 hp at the rear wheel.
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter
Progressive fork springs
Nitron rear shocks
Adjustable spring preloaders ....

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 17:47 #796629

  • Zaddict
  • Zaddict's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Enjoying my Zaddiction!
  • Posts: 217
  • Thank you received: 19

waktaylor wrote: I don’t really like punching out the ccs on a bike for some reason it seems dishonest. Some people can build the 650 out to over 800 but it just seems like it would remove the soul of the bike.
BUT high compression and hot cams, in my opinion, simply amplify the soul!

Lol, interesting perspective. Maybe there's something to that...
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter
Progressive fork springs
Nitron rear shocks
Adjustable spring preloaders ....
The following user(s) said Thank You: waktaylor

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 19:55 #796638

  • loudhvx
  • loudhvx's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 9674
  • Thank you received: 1130
Sorry off topic also... you guys with your 650's and Delkevics are driving me nuts. Those things are exactly what I want need. But, of course, not available yet for a 550 :( . Alright, carry on. I'll go sit in the corner and dry my tears.

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 20:25 #796640

  • Zaddict
  • Zaddict's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Enjoying my Zaddiction!
  • Posts: 217
  • Thank you received: 19
Lou, there are tons of exhaust systems still available for the zr400/550 that should fit your bike with minimal modification -
japan.webike.net/ps/#!&p.m=396&p.c=1002&p.sk=1
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter
Progressive fork springs
Nitron rear shocks
Adjustable spring preloaders ....

Please Log in or Create an account to join the conversation.

bigger bike, modern bike, or sup up my 550? 12 Jan 2019 21:44 #796645

  • loudhvx
  • loudhvx's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 9674
  • Thank you received: 1130
Thanks Mark. Yeah, I figured, but a stainless header for $250 is pretty hard to beat. I don't see how Delkevic can make that for that price, even if it's made in Asia somewhere.

Please Log in or Create an account to join the conversation.

Last edit: by loudhvx.

bigger bike, modern bike, or sup up my 550? 13 Jan 2019 06:39 #796670

  • CoreyClough
  • CoreyClough's Avatar
  • Offline
  • Member
  • Member
  • GPz550 Addiction
  • Posts: 1096
  • Thank you received: 72
Mark and I live about 24 miles from each other, and I have known him for a few years now. He has come a long way with his ZR550, and has even been doing some track days on it. Will he eventually start racing? That is up to him.

I feel for you on this subject Mark. You can finish the project you have and get another and go a different path, but if you need to sell the ZR to fund the other, because you don't have the space for 2 bikes, that is you call. Maybe get a storage for the second bike? 615cc with lumpier cams really wakes up the 550, from my experience on the track and the street. Reliable in daily commuting? I don't see why not. You have a choice of 615 kits. Wiseco 10.25:1, or from Dynoman, his 12:1 Kit. I have had conversations with Dynoman and running our pump gas limited 91 Octane would not be a problem with the 12:1, and non-stock cams. No need to run race gas. Gary is running the 12;1 and Web Cams (#1264) in his 1984, and loves it. This is very similar to Megacycle's 478-60 Grind.

As for another bike, the ZXR1100/1200 is always calling my name. They have the look I like, and options to upgrade performance if needed.

Good luck on your search, and by the way, we still need to ride sometime.

EDIT: Here is another ZR550 Project for you
losangeles.craigslist.org/wst/mcy/d/kawa...sale/6771513322.html
'85 GPz550(ZX550-A2)

GPz550 Base Manual --> tinyurl.com/ze5b3qo
GPz550 Supplement Manual --> tinyurl.com/h34d2o6
GPz550.com --> www.nwsca.com/scripts/gpz_forum_2005/default.asp
First Race Win GPz550 --> tinyurl.com/o5y3ftp
The following user(s) said Thank You: Zaddict

Please Log in or Create an account to join the conversation.

Last edit: by CoreyClough.

bigger bike, modern bike, or sup up my 550? 13 Jan 2019 10:33 #796695

  • Daftrusty
  • Daftrusty's Avatar
  • Offline
  • Member
  • Member
  • Posts: 299
  • Thank you received: 124
Wow! That craigslist ad for all those Zephyrs and parts would be a dream come true if I wasn’t 7 states away. There are so many things he has that I have been desperately searching for. And yet I have duplicates of almost all of it as well....

But on a different note, I noticed that Kawasaki shows the base gaskets for all the 550’s are no longer avalible. So finding OEM ones on eBay is our only source and soon they will become unobtainable. This sucks because the aftermarket base gaskets are very hit and miss in quality. I am currently using an aftermarket one and (fingers crossed) it is totally leak free.
I have a spare zr550 motor that needs new oil seals in the cylinder block and I want to find a OEM gasket for it but the prices have understandably doubled.
So if you are going to go the 615 route you will need to find a quality base gasket before you tear everthing apart.

Please Log in or Create an account to join the conversation.

Last edit: by Daftrusty.

bigger bike, modern bike, or sup up my 550? 16 Jan 2019 09:03 #796876

  • Daftrusty
  • Daftrusty's Avatar
  • Offline
  • Member
  • Member
  • Posts: 299
  • Thank you received: 124

Daftrusty wrote: But on a different note, I noticed that Kawasaki shows the base gaskets for all the 550’s are no longer avalible. So finding OEM ones on eBay is our only source and soon they will become unobtainable. This sucks because the aftermarket base gaskets are very hit and miss in quality. I am currently using an aftermarket one and (fingers crossed) it is totally leak free.
I have a spare zr550 motor that needs new oil seals in the cylinder block and I want to find a OEM gasket for it but the prices have understandably doubled.
So if you are going to go the 615 route you will need to find a quality base gasket before you tear everthing apart.


I must have had a stroke...as I looked today and ebay is flooded with OEM 550 base gaskets for very reasonable prices. There is about 5-7 different part numbers for them through the years as they changed materials and so on. I am daft....
The following user(s) said Thank You: loudhvx

Please Log in or Create an account to join the conversation.

  • Page:
  • 1
  • 2
Powered by Kunena Forum