By registering at the community, you agree to the following terms. reserves the right to remove any posting it finds unsuitable. Members who refuse to play by the following rules will be excluded from the discussion board.

KZrider is more than a website. Its members comprise a community of KZ enthusiasts dedicated to encouraging and preserving our sport and passion for Kawasaki Z, Z1 and KZ motorcycles. We pursue our passion because we enjoy it, not to make money from it. To that end, except as provided below, is not a place for you to solicit sales of any kind. No member is allowed to refer to their own business, or any business to which he/she is associated, through the discussion forum or personal messaging system (U2U). Be aware, the U2U feature has been abused in the past. If any member solicits an unwelcomed solicitation through the U2U system please report that solicitation to the Administrator or Moderators promptly.
Business names are permitted as user names ONLY by paying advertisers, which paying advertiser's business name will be changed to a non-business name upon cessation of advertising. Such prohibitions include but are not limited to images with a watermark, logo or other reference to one's own business.
There are four exceptions to this policy:
1. An item may be offered for sale in any forum where there exists reasonable expectation of being welcomed by another member who has previously expressed a need for that item in the thread ("cold calls" and "door-to-door" solicitations are prohibited). This exception applies to regular members and paying advertisers. Of course, the classifieds are still available but are limited to consumer-to-consumer transactions.
2. Each member is allowed a simple link ( in their signature, which link shall include no description of any kind.
3. As allowed only in the Vendor forum where paying advertisers may refer to their own business and include images with a watermark, logo or other reference to their own business.
4. In general forums, paying advertisers may refer to their own product or service ONLY to correct a misstatement or misunderstanding existing in the thread about the paying advertiser's product or service. A paying advertiser shall not include any negative comment about another vendor's product or service. Paying advertisers are subject to the same rules and sanctions as are all other members, applied equally to all, without exception.

You may not post libelous or defamatory messages or materials, or include links to such materials in your postings. You may not post messages that are obscene, violent, abusive or designed to harass or intimidate another individual. Pornography, Warez, or any other illegal transactions may not be posted or included in members profiles. No blatant nudity.

Don't use racial, ethnic, or gender slurs, religiously derogatory comments or any other personal discriminations even in jest. Use of slurs needlessly offends people - whether or not they're a member of the group you've insulted. Respect others' religious beliefs and culture. Recognize that others have religious and personal beliefs which may differ from yours. Stay away from political debates. Keep the language and behaviour appropriate.

When you post a new thread, please give users some idea of what it contains in the title. Thread titles like "Help" or "Check this out!" are cheap ways of getting users to look at a thread they might not care about, and would not have clicked on had the full title "Help, I need credit card numbers!" been used. Furthermore, it helps stop multiple threads on the same subject. When starting a new thread, describe the content of your thread clearly in the 'Subject' line of your post. Don't use vague subjects. Use descriptive and specific subject lines. This helps others decide whether your particular words of wisdom relate to a topic they care about. For example: "HELP!!" is not an appropriate subject and neither is "My bike doesn't run".

That cap lock key wasn't invented to help you get your message across. Messages written in all caps are annoying, hard to read, and loud.

Please look for an existing thread on a subject before you post one about it. Chances are good that your question has already been answered. There is a search feature on these forums, use it. Starting topics that have already been answered in great detail is a waste of everyone's time. Look to see if information you're about to post has just been posted by someone else. Then go ahead and post.

The Technical Forums have different sections for a reason. If you're not sure, use your best judgment. 

Cross-posting is when you post the same message multiple times in various threads or forums. We only need to see it once guys. 

Keep threads on topic. If you've got something completely unrelated to say then start a new thread. Unresponsive solicitations for consumer-to-consumer sale are prohibited as being unrelated and off topic, but solicitations for consumer-to-consumer sale may be posted in Classifieds.

Adhere to the same high standards (or higher) of behaviour online that you follow in real life. In real life, most people are fairly polite and law abiding. The same rules of behaviour are expected on any list.

or introduce a relevant idea. If you've read enough threads, you've already learned how annoying it is to go through "Me Too" posts. A "Me Too" is a post that says "I agree with what the other guy said" and otherwise does not add to the content. If you have a comment about someone else's post, tell them via U2U or email. Generally speaking, unless it concerns the entire group and is within the group's stated purpose, you should reply only to the author. Avoid replies or responses to the whole list of yes, no, or "I agree!". This is meaningless and you too would be annoyed to open such a message.

If you are a new member, introduce yourself by posting to the New Member Forum. While it's nice to welcome a new member, only do so if they have posted in the New Members forum. There is no need for 50 welcome posts in a technical forum thread.

Please don't start a topic that is directed at one person that could be put into a U2U to them. If you have a message for one or two posters, use U2U or email.

Images & attachments may be posted as long as they are not explicive or offensive. Images are limited in size to 2mb. The Project Forum is for members' rides only and is an ideal place to document your rebuild.

Don't even start them, they will be ended, quickly, and you'll find yourself on the short bus. Flaming: Personal attacks in cyberspace can be particularly vicious. Flaming is the rather nasty art of attacking others on a personal level.

  • Register
Welcome, Guest
Username: Password: Remember me

TOPIC: will 08 R1 swing arm fit kz650

will 08 R1 swing arm fit kz650 8 years 4 months ago #237644

  • chillz3201
  • chillz3201's Avatar
  • Offline
  • Member
  • Posts: 10
I just got the deal of the century on a complete suspension for an 08 R1 (yamaha). I was wondering if the rear swing arm will fit in between the frame of my kz650. and what i will have to doto get the front to fit also. I do not have the set yet I am picking them up so I havent measured.
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237645

  • BSKZ650
  • BSKZ650's Avatar
  • Offline
  • Member
  • Posts: 2064
  • Thank you received: 3
welcome, any thing can be made to fit, question is how are your fabrication and welding skills
77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237652

  • chillz3201
  • chillz3201's Avatar
  • Offline
  • Member
  • Posts: 10
I geuss the better question would have been will it fit with out slicing it up (rear swing arm)? My skills are limited to cutting and measuring but I have a buddy who owns a motorcycle shop who can weld very well doing the work while I help him. I just dont know much about the KZ650 as far as measurements go. I have only owned the bike for three weeks. I bought it with the idea of having a unique street fighter. I appreciate your input and any advice you can give me.
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237757

  • Paling1
  • Paling1's Avatar
  • Offline
  • Member
  • Posts: 80
I have a pic with some dimensions of a '02/'03 R1.

This one is 260 mm wide at the frame... I'm not sure about a Z650, but a Z750 has only ±225 mm between the frame. So you probably have to cut something of the swingarm.
But then I'm not sure if you can get bearings in it. As far as I know there are 2 needlebearings in it, there is also a rollerbearing at the chainside.
My KZ700 only has 2 needle bearings, so you may be able to modify an R1 swingarm to fit with only the needlebearings.

There is also the length of the swingarm to consider. Modern sportbikes get the longest swingarms manufacturers can get in the frame without altering the wheelbase of the bike. This supposedly helps traction.
I know that the R1 models after '02/'03 got an even longer swingarm.

I hope this helps, and please make a lot of pictures when you decide to put this swingarm in your bike!:woohoo:
I think it would look really cool with dualshock mounts welded on it...B)
KZ700-A1 (1984)
525 chain conversion; Dyna 2,2 ohm coils; Taylor plugwires; Stainless steel ZR-7 exhaust; Remus muffler.
Plans: GPZ cams, ported head, 17 inch wheels, EFI....
Last Edit: 8 years 4 months ago by Paling1.
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237812

  • chillz3201
  • chillz3201's Avatar
  • Offline
  • Member
  • Posts: 10
Thank you! It does help. I picked up the parts today and I dont think it will take that much cutting. The R1 swing arm is less than an inch wider the the KZ swing arm. It looks like all I will need to cut is the bearing races they are outside the body of the swing arm. I hope I can cut them cleanly and just push them further inside the body of the swing arm and weld them. The R1 swing arm is approx. 3 1/2 inches longer so I will have to get a chain (but i wanted it a little longer). The only real unknown right now is what type of spacing I will have to do to get the chian lined up. I am going to swap it to mono shock since i got all that with the swing arm. I will take pictures all through the conversion. I am extremely excited. Now I just gotta save some more money for the fab work. Wish me luck. I will also document everything we have to do and post it for future searches.
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237818

  • galaxian
  • galaxian's Avatar
  • Offline
  • Member
  • Posts: 335
You may run into several problems:

1. If you cut the outer ends of the swingarm (where the bearings are) you will need to re-fit the bearings inboard more and that may pose a problem beacuse the ID of the swingarm usually is much smaller as you get closer to the center. If you gut the swingarm you will see that the bearings are held in place by the fact that they cannot slide inward toward center becasue the ID of the swingarm is actually smaller. At least that is how most of the modern day swingarms are.

So you will need to play the bearing and spacer game to get it to fit. Not impossible just irritating trying to find the right bushing in the Mcmaster Carr catalog.

2.Offset is not your friend. At least not on a 25 plus year old bike with a modern swingarm. Are you going to use a 6inch rim? I suspect that the r1 must use that. On my 1000 i fitted a 6 inch rim with less that 1/8 inch clearance between frame and chain and between chain and tire. On a 650 it may be even a tighter fit but maybe not. I would love to see you do this so get to it and take some pics.:) Good Luck!
1977 KZ1000A1, 1979 KZ650 C3
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237828

  • chillz3201
  • chillz3201's Avatar
  • Offline
  • Member
  • Posts: 10
Thank you, I have helped build several 4 wheeled projects but this is my first two wheeled one. I am using a 6in. (stock R1) wheel and the offset is the only part that is scaring me, it is going to be very tight. I have so many ideas running through my head on how to get around clearance issues. With the bearings in the swing arm it could get expensive but I can always take it to a fab shop and have them add or take away metal (I hope) to make the bearings fit but with clearance it could be a different issue. And we havent even started talking about the front, it is from the same R1 and I have a feeling it will be fun to. But I got such a good deal I couldnt pass them up. I paid $300.00 for everything (pulled the front off the frame including brakes wheel and tire, clipons, reseviors, electrical tripple trees and the rear also cam complete. So I figured what I saved on the parts was worth a little extra effort to get it done. But please keep the advice coming I really appreciate any you can give. Include any experiences you may have had with this type of conversion.
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237838

  • Bad Kaw
  • Bad Kaw's Avatar
  • Offline
  • Member
  • Flying Squirell
  • Posts: 1750
  • Thank you received: 7
Ewwwwwwwww, ain't you a bargain hunter! Nice buy!

The front will be much easier. The "best" way will be to press the R1 stem out of the triples and fit your KZ stem into the R1 bottom triple clamp. This will allow a basic front clip swap. Be aware that the off-set of the new front forks will be much closer to the bike and therefore the forks will contact your fuel tank much sooner in the turn...solution will be to fabricate steering stops that solve the interface issue.

BTW: We NEEEEED pictures! :)

78 Kawasaki Z1R
81 Kawasaki KZ1000J (mods)
82 Kawasaki ELR Clone (1000 J)
82 Kawasaki KZ750R1/GPz750 ELR-ed
70 Kawasaki KV75
83 Honda CB1100F (few mods)
79 Suzuki GS1000 (rolling frame / project / junk)
84 Suzuki GS1150ES (modified project)
83 Yamaha XJ900R (project / junk)
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 4 months ago #237877

  • chillz3201
  • chillz3201's Avatar
  • Offline
  • Member
  • Posts: 10
Thank you, I would have never thought of that and didnt know you could just press out the stem.Would I be so lucky as to have the KZ stem press right into the R1 triple with no modification? :) Or will I have to fab something up to make it fit? If it is as simple as just pressing it in and out I will get some pictires of the front up soon. If not I have to wait my turn at my buddies shop. He is pretty backed up.
The administrator has disabled public write access.

will 08 R1 swing arm fit kz650 8 years 3 months ago #238992

  • perattzi
  • perattzi's Avatar
  • Offline
  • Member
  • Posts: 48
Very interested in this thread! I have been toying with the idea of putting an r6 front end on my 78 650. And keeping the stock swingarm but fitting a 17 rear wheel...has anyone done this to the rear? good luck chillz!
1978 KZ650B w/ Zuki running gear project
The administrator has disabled public write access.

Please help keep KZRider running by donating what you can.