THE BIGWHEEL THREAD!!! Yamaha BW350, BW200

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

  1. Duster11

    Duster11 Adventurer

    Joined:
    Dec 11, 2012
    Oddometer:
    16
    Went to AMA vintage days and took the 200. Saw 1 other 200, about 3 80's and no 350s. Made a deal on one of the 80's and it carried my 250 lb butt around the track for the next 12 hours. Should have brought a clown suit to complete the presentation.

    [​IMG]

    Uploaded with ImageShack.us
  2. BWSwamper

    BWSwamper Been here awhile

    Joined:
    Dec 3, 2012
    Oddometer:
    197
    Location:
    Boggy Lowlands of Carolina
    Does anyone know a source for the OEM carb bowl drain plug screw? (This is listed as part number 11 in the Yamaha parts diagram for the carb.)

    I have one on which the cone shaped gasket is damaged and will no longer seal properly.

    The parts sites I have checked don't show this screw or gasket as being available. I thought perhaps someone knew of another carb which used the same drain plug screw.
  3. Duster11

    Duster11 Adventurer

    Joined:
    Dec 11, 2012
    Oddometer:
    16
  4. wingnut racer

    wingnut racer Been here awhile

    Joined:
    Dec 15, 2007
    Oddometer:
    111
    Location:
    brookyln ny
    I'd love to see those pix as I'm getting to street my 350. :clap Getting ready for when the zombies march on Brooklyn. I thought they already had but soon learned they were hipsters!
  5. RWBWheel

    RWBWheel Been here awhile

    Joined:
    Oct 26, 2012
    Oddometer:
    130
    Location:
    Pacific Northwest-Everett Wa.
    Wingnut..Did you check with NY Dept of vehicles? dot rated are probably needed for your inspection to pass as it has been in most states that allow conversion of 'dirtbikes' to street legal..are you doing horn-blinkers-reflectors-mirror?
    There are dot rated tires that will fit ..
  6. wingnut racer

    wingnut racer Been here awhile

    Joined:
    Dec 15, 2007
    Oddometer:
    111
    Location:
    brookyln ny
    got led signals, tail light, horn. mirrors, good brush guards NOS Tank (mine was yellow, cracked and leaking). Getting an outta state plate and reg then I'll just eventually transfer to a NY plate. I've found this to be an easier softer way when putting things without titles on the road in NY. As for inspection stickers not an issue a few places will just give me one. I will get the DOT Radials at some point. They look like they'd be awesome off road too. Would like to investigate a better head light as the stock one dims to a useless level unless you're on the gas. Going to throw all the parts together in the next few weeks and will post pix.
  7. RWBWheel

    RWBWheel Been here awhile

    Joined:
    Oct 26, 2012
    Oddometer:
    130
    Location:
    Pacific Northwest-Everett Wa.
    Here in Wa mine might not pass current inspection without being 'grandfathered' witch will last till a trooper/sheriff pulls me over with knowledge..but ill have fun till then...There are some totally street tires that are dot rated that would fit..wrap that sucka' in the graphite/kelvar black buswrap and cruise Brooklyn lookin' like the batman bike..have a second set for upstate-off road..
  8. Florida Mark

    Florida Mark Adventurer

    Joined:
    Jul 2, 2013
    Oddometer:
    21
    Location:
    Central Florida
    Well I got the Carb and air filter in for the 80 and put them on and the thing cranked right up and ran well. So I drained the gear oil and what a milky brown mess that stuff was. So I ran some sea foam and atf fluid through it to flush it and took it out for a ride (after having my local tire shop put a valve stem in the flat rear tire 5 well spent dollars.) Cranked it up and shifted into gear so it jerked and quit. Started it again, got it rolling and shifted into gear and road up and down the road. Shifted fine through all three gears, but when I slowed down it quit. Figuring my cent clutch is not clutching or maybe it is clutching, but either way it ain't working. Anyone have any advice before I tear into it.
    Then I took the plunge into the Carb of then 350 and to my pleasant surprise it was very clean except some oily junk in the bowl. My joy turned to dismay as I discovered some silicone stuff on one of the prongs that hold the float pin, and when I pulled it I discovered that the reason was that the prong was broken just above that hole. The broken piece was still there though luckily. Long story short I put it back together and the pin holds the broken piece on and hopefully the bottom of the bowl will help hold it together. If not I will try some fuel tank repair putty to stick it together but I will replace the needle and seat first since it may not be possible ever again. Anyone have any other ideas on fixing it? Ordered a petcock since the old one was jb welded to the old leaky tank. Fyi, my dealer said that the computer said there were only two tanks left at Yamaha. He matched part shark and I got the tank for $300. So far I have $2200 in a running 80 and a remarkably clean but yet to be started 350. Let me know what you guys think about my two issues. Thanks for reading.
    -Mark
  9. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
    Mar 4, 2009
    Oddometer:
    756
    Location:
    South central Alaska
    My 80 had the original carb on it and ran similarly to yours. I bought a $23 Chinese carb off of ebay (including shipping) and it now idles and runs well with the jetting that came with the new one. I did have to use the original top of the carb (the part that the cable runs through to connect to the slide) because the new one was not an exact match.

    It would probably cost $20 in gaskets alone to rebuild the original carb, so I think it is a good investment, even though I hate buying Chinese junk.

    Speaking of junk; I have seen a number of TK carbs with one of the posts for the float broken off. People must hammer the bowl off when the gasket sticks and break the mounts in the process.

    The best solution that I have seen is to drill a very small hole in the broken post, drill another in the stub of the broken post, and then insert a wire or small metal rod in the hole with a small amount of JB weld or an adhesive that will resist fuel.

    It is an imperfect solution but there is no real way to fix the casting.

    Regards,

    Mr. BigWheel
  10. lexscholar

    lexscholar Adventurer

    Joined:
    Feb 5, 2013
    Oddometer:
    22
    Location:
    DFW, Texas
    Well, I decided on going with the ITP Mud Lite AT Tire 56A388. After too much reflection, I went with the 22x11x9 size. The profile of the tire was worrisome when I recieved it, it looked awful "square". After mounting, with less than 10 pounds PSI, I think it will be just fine (my air gauge is questionable as to the exact number). For anyone interested, the mounted, inflated diameter of the tire is 22.9 inches.
    [​IMG]

    I've not had a chance to really put it through its paces, so the performance remains to be seen.
  11. Mr. BigWheel

    Mr. BigWheel b00b

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

    Please keep us advised. That is a tire I have long wanted to try but haven't since it can't be effectively studded. it looks like it would be a great summer tire though.

    I ordered a 25" Mud Lite but I think the dealer I went to dropped the ball and never placed the order.

    The complaint that the 4 wheelers and side x sides have with the Mud Lites is a thin sidewall. Cliff has had some fun riding alongside a wheeler that got a flat and had to ride it out because the sidewall was damaged beyond the capabilities of a plug.

    Come to think of it, a LOT of the people that Cliff rides with suffer mysterious flats. Hmmmmm....

    Regards,

    Mr. BigWheel
  12. BWSwamper

    BWSwamper Been here awhile

    Joined:
    Dec 3, 2012
    Oddometer:
    197
    Location:
    Boggy Lowlands of Carolina
    There certainly does seem to be a lot of variation between the stated and mounted tire dimensions of ATV tires. 22.9 is pretty close to 23 - the stated OEM diameter. But, then again, the OEM rears were either 11 or 12 wide with various reports that the mounted width of the 11 was actually greater than the 12. I think Uncle BigWheel had the OEM 11 and 12 wide dimensions on the BigWheel group.

    Here is Uncle BigWheel's comment from the group. There is a comparison photo posted under his photos on the group site.

    "85 on RIGHT is a12" but not as wide 11" The original 85 tire is taller actually about 23" tall compared to 21.5 on the 647M. but it is actually not as wide"
  13. lexscholar

    lexscholar Adventurer

    Joined:
    Feb 5, 2013
    Oddometer:
    22
    Location:
    DFW, Texas
    No doubt on the variations of reported diameters. That's why I took a tape measure and used some handy, dandy stuff called "geometry." That's pretty heady stuff for a guy that rides a Big Wheel!
  14. Mr. BigWheel

    Mr. BigWheel b00b

    Joined:
    Mar 4, 2009
    Oddometer:
    756
    Location:
    South central Alaska
    What is this "geometry" you speak of.

    Isn't diameter something that you measure with a string?
  15. Shercoman

    Shercoman Been here awhile

    Joined:
    Jul 5, 2008
    Oddometer:
    457
    Location:
    Pine,Colorado

    No,diameter is measured by putting one hand on each side of the item to be measured.

    Think "fisherman".
  16. wingnut racer

    wingnut racer Been here awhile

    Joined:
    Dec 15, 2007
    Oddometer:
    111
    Location:
    brookyln ny
    Just got some of the bigger footpegs (went w steele) thanx Mr. Bigwheel for the suggestion
  17. lexscholar

    lexscholar Adventurer

    Joined:
    Feb 5, 2013
    Oddometer:
    22
    Location:
    DFW, Texas
    [​IMG]

    Calipers also work.
  18. BWSwamper

    BWSwamper Been here awhile

    Joined:
    Dec 3, 2012
    Oddometer:
    197
    Location:
    Boggy Lowlands of Carolina
  19. greg24

    greg24 Adventurer

    Joined:
    Mar 12, 2013
    Oddometer:
    17
    Location:
    lewiston idaho
    well I was looking for a set of tires so I order a set of sti atr . on the front I got a 25-8-12 and on the back a 25-12-9 so will let you all know how that goes. just as long as the better half don't beat we with them:huh
  20. RWBWheel

    RWBWheel Been here awhile

    Joined:
    Oct 26, 2012
    Oddometer:
    130
    Location:
    Pacific Northwest-Everett Wa.