THE BIGWHEEL THREAD!!! Yamaha BW350, BW200

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

  1. FutZ

    FutZ Adventurer

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    I'm not having any issues yet with my CDI but after reading this whole thread it is something we all need to be worried about for the future.

    I found a programmable CDI for around $150 for the whole kit, but after I got the timing curve recorded then I could program the boxes to be replacements for around $70 plus shipping. Granted it would still be a custom wiring job and I'm not 100% sure on the kill switch and lighting coil. But it still looks worth investigating.

    I have a working 85 BW200 and the 87 BW350 so I could get the programing for both.

  2. BWSwamper

    BWSwamper Been here awhile

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    Sounds like a great option if you can get it sorted out. Please keep us updated.

    (Successful solution of the BW CDI problem leads to one being awarded an honorary title still under development, but something like "Champion of the Big Wheel Empire".)
  3. DEAVER

    DEAVER Been here awhile

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  4. BWSwamper

    BWSwamper Been here awhile

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    That Ebay ad seems to shows fitment for both the BW200 and the BW350. I don't think the same sprocket could fit both due to the offset from the dish of the 350 sprocket. One or the other would be out of alignment, wouldn't it.

    JT's website shows a different part number for the two. Not the clearest photo, but the sprocket in the link does seem to have a offset, just not dished like the OEM.
  5. wingnut racer

    wingnut racer Been here awhile

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    What you guys running? Can't seem to find suggested pressure anywhere. I got rocks, soft dirt hills and sand whoops. Seems I've been too high or low and haven't found that happy medium. Thanx Van
  6. DEAVER

    DEAVER Been here awhile

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    Put a new CDI in my 350 today, starts without choke and has a nice steady idle. took it for the usual 15min run up and down some hills and seems much better. hopefully this clears up my hesitation and loss of power issues.

    also got a new tank, super white, these bikes must've been really sweat when brand new. just gotta get the decals from my friend, who has a friend who can make them.
  7. DEAVER

    DEAVER Been here awhile

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    just thought i'd bring this back for the new people




  8. Cliff h

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

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    Sorry, I can't help you with a pressure number. I once overinflated a front tire that was leaking, in order to extend the interval between air ups. This was on a snow ride. The front end did not track well and wanted to dart around (partially, but not wholly due to the snowy conditions). As pressure was reduced, the front end tracked much better. I never put a pressure gauge in my tires, I adjust according to ride feel. What kind of conditions/terrain do you ride in?
  9. Mr. BigWheel

    Mr. BigWheel b00b

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    I don't think that the sprocket shown it the photo on ebay will work on either the 200 or the 350. The tooth count might be correct but the location that it attaches to the axle is entirely too wide to be used without a spacer of some sort.

    Since there are no more 350, dished sprockets available, we are going to have to use spacers and 200 sprockets anyway. The Sixpepper method involves a cut-down BW200 sprocket and a new BW200 sprocket in combination:

    http://www.youtube.com/watch?v=V6eFZtjwrhE

    It is all presented in a pleasing Georgia accent and sometimes I play these videos to help me fall asleep.

    Regardless, DON'T THROW OUT YOUR OLD SPROCKETS!!!! YOU ARE GOING TO NEED THEM TO MAKE SPACERS FOR YOUR NEXT 350 SPROCKET!!!!

    Regards,

    Mr. BigWheel
  10. FutZ

    FutZ Adventurer

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    BW200 manual calls for 4.3 psi
    BW350 manual calls for 5.8 psi

    It requires a low pressure air gauge to be able to set pressures in this range. I thing most everyone goes with a trial and error or kick/bounce/ride testing for air pressure.
  11. wingnut racer

    wingnut racer Been here awhile

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    Thanx, Van.
    Gonna tackle some sand whoops this weekend :clap
  12. FutZ

    FutZ Adventurer

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    Get my BW350 tonight! Going riding tomorrow, they have a sale at Menard's this weekend for a sharper image gopro knockoff 720p for $20 after the rebate. I will have that out with us so we shall see how it does.
  13. DEAVER

    DEAVER Been here awhile

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    have fun, put the vid on you tube when u got time.\\\
  14. DEAVER

    DEAVER Been here awhile

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    anybody runnin around with a rear sproket that has been modded for the 350? i saw 6peppers video. my sproket is in great shape, but i like to be prepared.

    what should i do with my old cdi, toss it, keep it just in case it can be repaired in the futurama?
  15. wingnut racer

    wingnut racer Been here awhile

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  16. DEAVER

    DEAVER Been here awhile

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    nice video, thanks for sharing. the terrain here is quite rocky, must be nice riding on sand.
  17. Mr. BigWheel

    Mr. BigWheel b00b

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    wingnut racer,

    Loved the video. That terrain is exactly what we ride in up here. Except there is no fun sand but lots of mud, swamps and slimy hill climbs. Maybe I should move.

    Deaver,

    I haven't done the 350 sprocket modification yet but I have a bike that is reaching the limits of the adjusters, so I will have to do one soon.

    Cliff has a bike that is so desperately in need of a sprocket, that the bike practically begs and pleads for maintenance when you push it backwards. The sprocket teeth are so bent over that the bike pops as the chain gets caught in the sprocket when it is reversing. We have begun to call Cliff "Captain Hook" when he rides this bike.

    We have thus far avoided fixing the issue by not pushing that bike backwards so much.

    Still, it is going to have to be dealt with soon. Or soonish.

    Regards,

    Mr. BigWheel
  18. DEAVER

    DEAVER Been here awhile

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    pics and/or tutorial when you do, may kickstart this forum again, plus i'd be super awesome.




  19. FutZ

    FutZ Adventurer

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    So video didn't turn out. I had mounted it to the front rack of my wife's Kodiak and now I know why everyone does a helmet mount. I will rig up a helmet mount for the next outing. The video was so shakey it was impossible to watch. That and 90% of it was just a dust trail.

    The BW200 did good in the sand and the trails but the silencer is missing so that was the main issue there. The BW350 well it looked great in the pictures but once I got a closer look at it I think I paid a little to much for what I got. The carb was half clogged, starter is broke, the chain broke at one point and snapped off part of the engine case but no leaks, the clutch needs adjusted, it needs new break shoes, no kick stand, kick start lever has been twisted around, and by the end of the 2nd ride the idle was really high.

    All that aside it was a great day. Although my Dad somehow managed to ignore all the issues with it and ride it like he stole it. I however spent the whole time on it just trying to keep it shinny side up. I obviously need more two wheel dirt riding experience. I've always been two wheels on the street and four off road. I will be going through the video tonight to see if I can grab some stills and snap a few photos of them in the stable.
  20. DEAVER

    DEAVER Been here awhile

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    they're definitly old bikes for sure, but with a carb rebuild and a good cleaning, it'll purr nicely. as long as the CDI doesn't act up. i gotta say these bikes are so versitile, i can't believe they haven't risen from the dead already for the next generation.