THE BIGWHEEL THREAD!!! Yamaha BW350, BW200

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

  1. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
    Mar 4, 2009
    Oddometer:
    756
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    epix1718,

    I imagine that a shot under the cover of a 350 would help not even a little bit, would it?

    BWSwamper,

    I went to the local fasteners shop with all of the hardware from my case cover "upgrade." All new, allen-head fasteners were relatively cheap. They lasted a whole month before they started rusting. Maybe I should have paid the extra for stainless, but just think of that extra 75 cents that I have left in my wallet.

    On the other hand, the Duro 24x11-10 HF243 has been mounted on the Shercoman-modded wheel. It has been studded and is ready to go on the bike. This is a pre-stud picture:

    [​IMG]

    It has a rather beach-ball shape to it since it is an 11 inch width on a 10" rim. I think that a 25x12-10 would be a better choice as the sidewall is somewhat exposed to the ravages of the trail.

    The Carlisle front has also been mounted and seems to have a narrower profile than would be ideal. I've been too afraid of failure to test it out yet, but the report will be forthcoming.

    Regards,

    Mr. BigWheel
  2. BWSwamper

    BWSwamper Been here awhile

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    Dec 3, 2012
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    Mr. BigWheel,

    Could you post a photo of that mounted front Carlisle?
  3. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
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    BWSwamper,

    Here's a shot of the tire mounted on the front:

    [​IMG]
  4. BWSwamper

    BWSwamper Been here awhile

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    Is that the 26x8-12?
  5. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
    Mar 4, 2009
    Oddometer:
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    That is a 25x8-12. And it's the XL with 3/4" lugs. I might have preferred the 26", but the die is cast.

    On the back end is the Duro HF243 24x11-10 on the Shercoman-modified 10" aluminum ITP rim:

    [​IMG]
  6. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
    Mar 4, 2009
    Oddometer:
    756
    Location:
    South central Alaska
    This is a picture of Cliff, the Big Red Dog's upgrade project after another marathon day installing various widgets and gimmickery on his 350:

    [​IMG]

    Renthal Twinwalls
    Renthal grips
    Rox risers
    '86 Tri Z Triple clamps
    '86 39mm Tri-Z forks
    Tri-Z rotor and caliper
    KTM-sourced Brembo master cylinder
    Studded tires
    YZF600 Shock
    DC plastics side panels
    IMS footpegs
    IMS gearshift lever

    and lots and lots of IMS stickers,

    Anybody need an IMS sticker?
  7. Cliff h

    Cliff h [IMG]http://i219.pho

    Joined:
    Dec 9, 2011
    Oddometer:
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    Anchorage, Ak
    Whoa, Whoa. Those Renthal grips were sacrificed to the BW 80 gods. That would have been over the top. Don't want people to think we are pulling "all" the stops out on this mutha.



    Found some brake mounting hardware.
  8. epix1718

    epix1718 Been here awhile

    Joined:
    Sep 14, 2010
    Oddometer:
    734
    Location:
    Michigan/Indiana border
    More into my BW200 kick start rebuild

    Well did some looking today and it appears that directly underneath the clutch assembly there is a insert (surrounded by black plastic) that looks like another shaft goes into.. any idea what this is for? I am assuming it is for the shaft in the diagram below that has no # attached to it.. what part would this be?

    [​IMG]

    You can somewhat see the black plastic circle in which the center is a hole, directly underneath the clutch.
    [​IMG]

    I've never really worked much on engines, can someone give me an explanation of what actually happens when you press on the kickstart lever? What are the gears actually rotating?

    looks like I am missing some parts on the decompression shaft too.. might as well order those up.
    [​IMG]

    decompression shaft removed:
    [​IMG]
    Thanks!
    Pete
  9. Röhrich

    Röhrich big wheel freak

    Joined:
    Dec 28, 2012
    Oddometer:
    196
    Location:
    Germany\Netherlands
    Hello everybody,

    Just got my new ITP MUD LITE tires for our BW200 and 350.
    They look GREAT.:eek1
    [​IMG]
    [​IMG]
    [​IMG]

    Regards,

    Röhrich
  10. dvgonzo

    dvgonzo Been here awhile

    Joined:
    Dec 26, 2004
    Oddometer:
    329
    Location:
    Albuquerque, New Mexico
    I STILL love reading all these BW posts the most, and ESPECIALLY when Mr. BW posts his movies! TWO thumbs up!

    Here is my problem though:

    I have to many toys! And have had for quite a few years!

    So, I have finally decided to off load BOTH my BW's since they never get any use.

    Both are VERY low mileage, in fact both STILL have the STOCK tires on them and I would be very surprised if either one has over 750-1000 miles.

    Last started about 5-6 years back (I think) but have been inside a nice building with a tarp over them, gas drained, and a squirt of erl in each jug, so I know all that will be required is new batteries and gas added.

    They both have Maier handguards, nice trickle charger adaptors and front racks, the big one also has a rear rack, Koplin front mounted gun case, aluminum skid pan, and way custom built fold up rear passenger footpegs.

    I have spare air and oil filters for them as well as probably some other misc. parts I need to gather up.

    I need to get them out, batteries bought/installed, and started up, but figured I would see if anyone here is interested before I go and post a for sale add on this site or do up a Craiglaist add.

    I will probably ask around 2200 for the 350 and 1600 for the little one.

    I am located in Albuquerque, New Mexico.

    Send me Pm and I will try to remember to check back within a couple days.

    As long as I do not take them out and go for a ride I should be able to off load em this time! HA!
  11. BWSwamper

    BWSwamper Been here awhile

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    Boggy Lowlands of Carolina
    Over on the yahoo group, one of the members did an XT225 engine swap into a BW200E. Looks like everything should be pretty simple - as far as engine swaps go. He used the original XT225 CDI and coil.

    In that project, the original BW200 carb was used. Seems like that would cut down on the power gain from the swap.

    Also, he apparently used the BW200 harness. Would there be much of an advantage to switching to an XT225 harness?
  12. epix1718

    epix1718 Been here awhile

    Joined:
    Sep 14, 2010
    Oddometer:
    734
    Location:
    Michigan/Indiana border
    Well bummer here.. took off the clutch on gf's BW200 tonight and it appears the shaft that holds the idler gear is missing or just sheared off whatever the main bigger shaft is here..

    Overall view of the case side, you can see the kickstart gear on the very left and the shaft that holds the clutch, but the one inbetween is now basically an empty "hole".
    [​IMG]

    Close Up of the where the idler shaft/gear is suppose to be.
    [​IMG]

    Previous owner did tell me he removed the kickstart and had to push start the bike, so this must be the reason why. Not sure if this is repairable (at least w/o splitting the case and putting in an all new shaft) so I'll just keep it push start I suppose.
  13. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
    Mar 4, 2009
    Oddometer:
    756
    Location:
    South central Alaska
    epix1718,

    That's a major bummer about the damage. The utility of an off-road bike is cut dramatically when it is push start only. If you have the ability to split the cases and get the kicker reinstalled, I think it would be worth the effort.

    BWSwamper,

    Did the XT225 plug into the BW's harness? I wouldn't think that they were compatible and it would make the xt225's harness the logical choice for the transplant. Not having to rely on the 200's vanishing supply of faulty CDIs would almost be enough to motivate the swap for most owners.

    Regards,

    Mr. BigWheel
  14. Shercoman

    Shercoman Been here awhile

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    Jul 5, 2008
    Oddometer:
    457
    Location:
    Pine,Colorado
    Mr. BW,
    I bought an '85 Tri-Z front end for my BW.
    Triple clamps and all.
    Is this a bolt on or are there modifications to the bearings or steering stem?

    I have the hub and front disc also.
    Does the BW wheel bolt to this hub?

    I don't have a brake yet. I have an XR650R caliper so I'll probably go with that.

    I have the go,now I'll have the longer legs and the whoa!
    Thinking about replacing the rear drum with a disc set up also.
  15. BWSwamper

    BWSwamper Been here awhile

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    Dec 3, 2012
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    Mr. BigWheel,

    The "Montysan" XT225 conversion posts over on the Yahoo Big Wheel group don't have to0 terribly much detail, but he did post some photos. These are about 5 years old and it looks like Montysan has sold his BW and wandered off.

    One of the photos shows what appears to be the left handle bar control switch from the XT225, so I conclude that he did use an XT225 harness. He definitely used the XT225 coil and CDI.

    He decided to cut and bend the frame down tube to make the standard XT225 front mounting bracket work. I believe I would try to make a custom front motor mount that would work with the standard frame. That would be a piece others could replicate and would allow a future reverse conversion.

    The photo album of Montysan's conversion are album number 102 on the Yahoo Big Wheel website. That's several pages down in the photo section. The resolution of the photos is not that high, but are adequate.

    Shercoman,
    I have the same question. There are aftermarket upgrade bearing kits for the BW200. They are from Moose Racing, I think. If this is an exact bolt up, perhaps it would be a good time to drop in the new upgrade bearing kit. But, I'm not clear on whether I would need Tri-Z steering bearing, BW steering bearings, or whether they are identical.

    http://www.mooseracing.com/products/?productGroupId=1558&productId=114490


    Mr. BigWheel,
    Does one need a Tri-Z axel and spacers to make the Tri-z hub/disc work, or will the BW front axels and spacers do the trick?
  16. Röhrich

    Röhrich big wheel freak

    Joined:
    Dec 28, 2012
    Oddometer:
    196
    Location:
    Germany\Netherlands
    Hi,

    How do you call that flag on the rear of that motorcycle?
    Where can I buy such a flag with stick an mounting?
    [​IMG]

    Thank you,

    Röhrich
  17. BWSwamper

    BWSwamper Been here awhile

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  18. kubiak

    kubiak Long timer

    Joined:
    Nov 25, 2007
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    4,837
    Location:
    madera california
    one of the best setups i have seen!
  19. BWSwamper

    BWSwamper Been here awhile

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    Cliff H,

    Was there any trouble with the cable length when you put those Rox risers on? Looks like those are the two inch model.

    Also, wanted to point out that photo six of the motocross track photos from last summer does indeed show a big red dog darting across the track in the back ground.
  20. Cliff h

    Cliff h [IMG]http://i219.pho

    Joined:
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    Anchorage, Ak
    BWSwamper:

    Yes those are a 2" Rox riser. They allow me to use either a 7/8" or a 1-1/8" handlerbar (I went with a 1-1/8" Renthal Twin Wall). I had no issues with cable lengths, but I don't think that you could go much higher without issues.

    As far as the Tri-z fork conversion (Mr. Bigwheel will say that I am only qualified to say "It's the CDI stupid"), from what I remember the '85 forks did not require a bearing change for the conversion. On my #2 bike with the '86 forks, I think that I remember Mr. Bigwheel changing the bearings while making the swap. I was spending about 2 hours changing the right foot peg, and trying (with moderate failure) to rebuild the brake caliper while he was swapping forks. I bought a new piston and seals to rebuild the caliper from a '85 Yamaha XT 350, as they seem to be the same as the Tri-z caliper. The Tri-z axle was used along with the hub. I think that the BW spacers are the same as the Tri-z's. The bigwheel front wheel can also be used with this setup.