THE BIGWHEEL THREAD!!! Yamaha BW350, BW200

Discussion in 'Thumpers' started by Mr. BigWheel, Feb 4, 2011.

  1. RWBWheel

    RWBWheel Been here awhile

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    Hi all,
    I just replaced my front 530 and used the clip type master that the orig had...was this a mistake?
    Cleaned rear in kerosene and looks new- went to replace with new masterlink-snap-on style like it had on it..
    went 100 feet and threw the chain..do you all prefer to use rivited masters or is there a secret to putting on the snap style links that I am missing?
    Any input form you more experiencd guys? i'd like to hear your input..
    the video i watched on installing rivet style says to micrometer the pin dia. when installing ....
  2. Shercoman

    Shercoman Been here awhile

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    I have been riding off road for 44 years and have never had a clip type master link come off or fail.

    They must be the right clip for the chain,put on correctly verifying that the closed end of the clip is facing forward to the direction of chain travel and the clip must be in the grooves on the pins.
    the clip must not be free to move around when "snapped" in place. If it is loose,it is sprung open or incorrect for the chain.
    Any of these are not correct and you might lose it.

    You did not say if you broke the chain (came apart) or if you simply threw it off the sprockets.
    If it came apart at the master link,one of the items above was not correct. If it stayed in one piece but came off the sprockets,you have an alignment and guide problem.
    After tensioning your chain,get down behind it and sight down the chain. You can clearly see if it's not straight.

    I don't care much for riveted links because if you don't have the proper tools to deform the end of the pin to the proper shape and size, it will come apart.
    On very high horsepower street bikes they are recommended because they are ultimately stronger IF installed correctly.
    I don't think our BW's fall under the "high horsepower" category.
  3. Mr. BigWheel

    Mr. BigWheel b00b

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    It is usually pretty difficult to misalign the 530(front) sprockets. I would have to guess that the chain came apart.

    Was the chain an O-ring style?

    If it is an O-ring, then that makes it a little bit harder to get the plate pushed down on the pins so the clip can slide into it's slot on the pins. There are fancy tools that make the installation easier or you can just use a pair of vice grips and a nut that has an I.D. that is larger than the pin.

    You just have to be careful that you don't press the plate on too tightly or the seals will be crushed and a tight link will be the result.
  4. RWBWheel

    RWBWheel Been here awhile

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    The front 530 I replaced with an o-ring like stock.
    rear is the 520 non -o ring chain and maybe the shop sold me wrong master? all 520 i assume would have same size pins ? regardless of manufacturer?
  5. Shercoman

    Shercoman Been here awhile

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    Not necessarily.Mr.BW is right.If you are mixing o-ring chain parts with non o-ring or something funky,you may not have a matching master for your chain.
    Did the master link come apart? Is that why your chain came off?

    If so I imagine the parts are lost.
    The key is that the clip,when installed is in the grooves on the pins and tight.It it moves around or is loose it will come off easily.
    Installed properly,it should take pliers or a bump from behind with a screwdriver to get the clip back off.You should not be able to wiggle it or move it around with your fingers.It should be tight.
  6. RWBWheel

    RWBWheel Been here awhile

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    The rear chain was being cleaned and re-installed- purchased new master link at non-Yam. shop. clip-style- not o-ring as on front..I think I must have done one of your items wrong, I know it was in correct dirrection. Yes it failed at the master and could not find any of the parts..Of course the tool box and bag of extra links were 40 miles away at home..live and learn..
    i wouldnt expect to swap 520 / 530 parts but shouldn't all 520 master links be the same?? or only a Yammie link on a yammie chain? / renthal link on renthal chain? Etc..
  7. Shercoman

    Shercoman Been here awhile

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    All 520 master links are not the same.Although the pitch (.625) and width (.250-inside) are the same,the actual dimensions of the parts can be different.
    You should use the master designed for the chain unless you are 10 miles from the truck and your buddy has one that will work well enough to get you home.
    The main thing is to get the clip on correctly and make sure it's tight when installed.
    The open end of the clip should look the same installed on the chain as it does when laying in your hand.
    The open end of the clip should be just as close together when installed.
    If I were to guess at what happened I would say the clip was correct on the leading pin and not in the groove correctly on the trailing pin.With a little movement the clip turned and then fell off.I know this is possible as I have done it myself.
  8. vroom_vroom

    vroom_vroom screaming chicken

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    The big wheel attracts lots of attention when you take it out in public. Few people up at cave lake had to tell me how cool it was.[​IMG]
    [​IMG]
    [​IMG]
  9. Shercoman

    Shercoman Been here awhile

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    Very cool!!! :clap
  10. greg24

    greg24 Adventurer

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    maybe some one can answer a question on the primary (short chain) is this a o-ring style chain an on the 2ndary (long chain) a standard 520 chain. if you where to replace the sprockets where is good place to buy them
  11. BigWheelCort

    BigWheelCort n00b

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    New guy here.

    I had a neighbor growing up who had a BW80 when I was a kid, and I was always insanely jealous of him and vowed to myself that "one day" it would be mine. Well, I'm 30 now, and the day has come.

    I've got a BW200 that I recently picked up off Ebay after I saw it for sale in this thread, and being a lurker, jumped on the chance for such a clean BW.

    That being said. I've never owned a dirt bike. I've never owned a motorcycle. So this is my crash course in learning. I live in a pretty nice place with tons of private property around that I can drive it on, and I'm learning more and more everyday.

    I'm also a pretty big tuner/car guy. I've built several cars in the past that have won awards at car shows, and I understand the principles of "it will treat you right if you do the same to it". My current other toy car is a 1985 Volkswagen GTi, and I have done quite a bit of modifications to it as well, and plan on taking the Big Wheel with me to car shows and playing around with it there.

    Now, I know I'm going to start modifying the BW. I'm a HUGE fan of lowering cars, and there is quite a scene down here in Texas with Ruckus modifying. I know these tires are ATV tires, so I was wondering if anyone has put on the skinny drag radial style tires on the BW and seeing what it would look like lowered to the ground? I'm more of a slow and low on the street type person, than a off road in the dirt and forests kinda person.

    Here's a pic of what I've got.

    [​IMG]

    and

    [​IMG]

    Here's the style tires I'm talking about

    [​IMG]

    from this

    [​IMG]

    Please excuse me if this is thought of as sacreligious.
  12. BWSwamper

    BWSwamper Been here awhile

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  13. Gladly

    Gladly Been here awhile

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    I don't think that sacreligious is the thought, but uniformed might be. a motorcycle tire needs to have a curved profile, as they lean over when turning.

    that would work nicely, and may give something close to the look you're seeking, while still maintaining a reasonable level of rideability
  14. BWSwamper

    BWSwamper Been here awhile

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    If you do this, we are going to need to select an official term - "MoWheel" or "Bigtard" as suggested earlier on this thread by RWBwheel.
  15. Mr. BigWheel

    Mr. BigWheel b00b

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    The chains can be either O-ring or standard for both the primary and secondary. As Sixpepper voiced recently on the Yahoo group forum:

    <center>
    <a href="http://autos.groups.yahoo.com/group/YAMAHABIGWHEELS/join">
    <img src="http://l.yimg.com/kq/static/images/yg/img/i/us/ui/join.gif" border="0"
    alt="Click here to join YAMAHABIGWHEELS"><br>Click to join YAMAHABIGWHEELS</a>
    </center>

    He prefers to run non-O ring chains because of the increase in drag that the o-ring chains cause. However, he also keeps out of the mudholes these days. If your riding is in dry dusty conditions, then standard chains would suffice. I run O-ring chains on the primary and secondary because paying too much for parts is just my style.

    The rear sprocket is #23 in this diagram:

    http://www.yamahasportsplaza.com/oemparts/a/yam/500427b6f8700209bc788aa7/rear-wheel

    Counter shaft sprocket #25:

    http://www.yamahasportsplaza.com/oemparts/a/yam/500427b6f8700209bc788aa7/rear-wheel

    The two jackshaft sprockets #20 and #21:

    http://www.yamahasportsplaza.com/oemparts/a/yam/500427b6f8700209bc788aa7/rear-wheel

    Yamaha still seems to have all of the sprockets in stock for the 200. Unfortunately, the 350 has run out of countershaft and 37 tooth secondary sprockets. Yamaha would be the simplest to order from but JT sprockets http://www.jtsprockets.com/catalogue/model/6373
    and SunStar make sprockets that fit the BWs. The aftermarket companies also have a range of sizes in case you want to change your ratios.

    My suggestion would be to buy a spare for all of these parts while they are still in stock. Add a chaincase for the secondary to your order and do your part to help the economy.

    Regards,

    Mr. BigWheel
  16. Shercoman

    Shercoman Been here awhile

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    I changed my primary chain to 520 on the BW400.
    My 400 engine has a 520 countershaft stock so I ground the thickness on the jackshaft sprocket to .250

    You may have better luck finding thes two sprockets with the correct inner spline design in 520 size.

    I did not do this research but I know there is more available in the smaller inner spline in the smaller chain size.
    Most bikes that use the larger and stronger 530 chain are your larger,high horsepower bikes. And those engines have larger shaft and spline sizes.
    That is why it is hard to find small spline but large chain sprockets unless they are direct BW parts.

    And no,I have had no problems with the front chain even though I'm putting a lot more power through it than a 200 or 350 would.

    Just trying to open up the options here......
  17. BigWheelCort

    BigWheelCort n00b

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    I like the idea of low wheel, instead of big wheel.

    Basically I want to do this kinda like what the Ruckus guys are doing

    Stock Ruckus

    [​IMG]

    to something like this ( but I'm not big on extended swing-arms to do it)

    [​IMG]
  18. Mr. BigWheel

    Mr. BigWheel b00b

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    I can't quite fathom why the Yamaha engineers used the 530 chain on the front sprockets. I would have assumed that it had to do with transferring horsepower and the additional tensile strength afforded by the 530 but even the YZ490 of the same year uses a 520. If any bike ever needed a strong chain, it was the 490.

    The only idea I can think is that the primary chain has the added stress from TWO small sprockets instead of the traditional small/large combo. In addition, the chain is so short, the links run over the two little sprockets much more frequently at any rpm.

    I think we will all be switching over to 520 on the primary chain shortly due to the lack of other options. I have done some searching and have found a number of sprockets that are good candidates but I still have some 530 stuff to use up and that has squelched some of the motivation.

    Onward and upward.
  19. Mr. BigWheel

    Mr. BigWheel b00b

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    BigWheelCort,

    There is a similar movement amongst the TW200 aficianados. They call them Hollow Mods and follow a Japanese style of customizing. An almost essential ingredient is an extended swing arm. You can practically build one of these out of a catalog these days.

    [​IMG]

    There are some pretty inventive guys on the TW200 forum:

    http://tw200forum.com/forum/forum.php

    Some of the builds there might inspire some ideas for you.
  20. Shercoman

    Shercoman Been here awhile

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    I don't think it was tensile strength so much. The BW engines never stressed the chains much.
    it has more to do with the short length and the number of times it goes around because of this.
    I just put a new 530 chain on my big motor quad project and it is amazing how much more massive it is than the 520 chain.Bigger in every way.
    So stronger and more capable of increased wear.

    That said,I have only adjusted the front chain on my 400 one time.
    The BW 500 also used a 520 chain for the front with no issues at all.

    I would look in that direction for replacements.