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Thread: KZ 900

  1. #1
    dvrpilot
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    I am interested in putting a fat tire on the rear of my 1976 KZ900. I am wondering what tire manufacturer would be a good choice. I want a tire that is about 8" wide. The type of riding is just cruising around backroads. I am mainly looking for the look mare than taking it to the track. Another thought is I would have to extend my front sprocket out about an inch does anyone have an idea how to do this and still have a sprocket cover





    Thanks


    Mark

  2. #2

    Join Date
    Aug 2004
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    Mark, I am also new to this forum. I will try to help you out.My background is in frame and fab and I have friends who help me with my motors.I have to assume the senior guys are hoping you check out some of the past forums as they have not answered andthere is a wealth of knowledge on there. I have built a few of these kinds of bikes and my current is a 75 z1. This is very similiar to your setup. First things first. A 8 inch tire is acheivable yet unrealisticfor the street.You may have to go with a 5.5 inch sportbike rim and put on a 180 or a 190 size tire. What you need to consider is the swingarm and the offset front sprocket. A 3/8 or 5/8 offsetare most common. They do make them up to a 3 inch offset yet these are really for the track bikes. You will have to have a swingarm made (I reccomend D&G out of largo florida, they made mine and are great to work with) This swingarm has to be big enough for your rim and tire and then you can decide the lengnth (extended) and so forth. You will also need to have a rear sprocket made ( I reccomend sprocket specialist`s ) Your front offset sprocket you can check out Jay at mre. Do not forget to consider the rear brakes to. You will have to get a new chain also (if you plan on extending the swingarm) Your sprockets should be probably the same tooyth as what you have on it front should be 15tooth and the rear if I remember is a 38tooth. I will try and post some pics of my bike so you can see what I mean. Joe

  3. #3
    dvrpilot
    Guest


    Joe





    well done very informative!! Sounds like a lot of work to get a wide tire however with winter around to corner may be fun to try. I am from clearwater, near largo will stop in and talk to the swingarm guys when I am in town. Thanks for your time





    mark

  4. #4

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    Aug 2004
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    Joe`s Bike

  5. #5

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    [img]uploads/rivman15/000_0703.jpg[/img]

  6. #6

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    [img]uploads/rivman15/000_0797.JPG[/img]Well maybe someone can explain as to why this will not load Joe

  7. #7
    getusome
    Guest
    rivman15 what about lowering the bike ,spoke rims,bars,oil cooler,the things you posted earlier where the ticket, do you have to get a swing arm fabricated or can you order it made ,instock im looking to do 5.5 wide spoke rim

  8. #8

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    Aug 2004
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    Yes you can have a swingarm made with a stock length to match your bike and have a 5.5 inch rim on there. I would question it though. The reason to length one is for a better launch when you gas your bike (you want to keep the front end on the ground and the extra length will help you with that) You also can rake your front end out which will help lower the bike(but that is another forum and subject) Oil cooler is a must. I have one on my bike and it will help keep your motor cooler on those hot days and long rides. Drag bars are a simple fix for your handlebars and will also help lower the bike. Look up Midwest motorcycle supply for your spoke wheels. I just got done trueing them to the stock hubs of my buddys bike (kz1000)16 inch rear hub to a 5.5 inch new spoke rim, got a 180 tire on it and could have put a 200 on it. front matched up to a stock hub also. I am still trying to figure out how to post my pictures on here. Any help Joe

  9. #9
    getusome
    Guest


    thanks for the info rivman15. so the custom swingarm you spoke about earlier ia actually a purpose built beefed up peice not just a added extension! . do you know of a shorter rear shock i can get and the front end is 1" or 2" the better size to cut of off the fork springs,one more pain in the butt question who has a catalog for the older drag bikes


    thanks again for the great info


    i caint figure out how to post a picture neither

  10. #10

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    Aug 2004
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    Yes swingarm is totally new and made for your bike.No extentions.You will have to search for lower shocks. I`ve had struts made for my bikes from the same people who have made my swingarms. Check out pingel for a catalog. You can get the lowering blocks for your front forks from them and you will not have to cut the springs. Joe

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