Yamaha TW200.. the swamp donkey

I picked up this fender off of eBay for $15 shipped. It was listed as a "universal vintage dirtbike fender" but the gurus of the vintage dirt world said its a Yamaha xt deal. It is the right era for the look I'm going for on the bike, and I dig the big louvers in the back. It's just safety wired on right now, but I'll eventually make a bracket to mount it up top.

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Popeye SXM said:
I like the vents but the fender is too big for the z50 look lol ;)
Haha yeah, I really thought about that when I was zipping it on, but im guessing that the knobbie will throw some mud, and if rather lose a bit of the "look" in favor of keeping mud out of my face;)

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I had racked my brain on the best possible way to mount the trailer wheel to a rear spindle, and what I had planned to do was make a complete spindle from scratch, and use a bw200 wheel mount center welded to it. I figured that if it can hold up to braking and steering forces on the front of a bike, it should be able to hold up to braking and driven forces out back, at least on a 17 h.p. bike. I bought a used bw200 front hub on eBay, and it just came in. I was pleasantly surprised to find that it should work as a compete unit with a little bit of modification. The rear drum from the TW bolts directly up to the flange on the bw hub, and with an extension tube to mount a sprocket carrier and a bearing internally, it'll bolt right up. Next I need to make up a set of tabs that'll weld to the wheel and bolt up to the hub. Sometimes even a blind squirrel finds a nut.
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I'm thinking these could take a rear wheel (maybe on the front too) like I have on the back of my Tri-Rod. Not saying you should do it to this one, but it sure does having me thinking about the future.
 
irk miller said:
I'm thinking these could take a rear wheel (maybe on the front too) like I have on the back of my Tri-Rod. Not saying you should do it to this one, but it sure does having me thinking about the future.
I was even thinking about running a stock bw200 front wheel out back. It would be nice having an aluminum rim, but the only thing is they (as well as the atc rims) are 11" diameter vs the 12" diameter trailer wheel. I don't much care that the rim would be smaller, BUT the outside diameter tires available for 11" rims are smaller than what you can get for 12" rims.

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Got a little lathe time in making the extension for the bw200 front -hub-to-rear-hub conversion. I had to turn a bit of the drum side tube of the bw hub down to make clearance for the brake plate to rest on the inner bearing race itself instead of the tube. I then turned and bored one end of a piece of heavy tube to press fit over the hub, then bored the other end to fit the bearings and seals. Yes that's right, bearings, plural. The stock tw hub had two bearings side by side on the sprocket side of the hub. I figured the engineers had a reason for this, so I'd do the same, plus it means that it'll use all standard tw200 bearings for if they ever need replaced again. I also turned a shoulder on the o.d. so ill have a square shoulder to press and weld the sprocket carrier against. I drilled a few holes to plug weld the extension onto the hub and pressed it on and welded it up. Once it was welded, I put fresh bearings in with the stock tw spacer. I checked for run- out, and all 4 tabs are within .020", and the welded tube itself is within .003". I'm not sure how close the tabs were from the factory, so I'm not gonna sweat it too much.

Also, a cool dude from the dr650 facebook page sent me a stock white fender for the cost of shipping, so it matches the white front fender. (Stock rear wheel just mounted back on for some measurements)
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Some small bits done. I felt like 70's squish grips fit the bill on this machine with a few fresh cables and new levers installed as well.
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pidjones said:
Those big tires get hold of the mud and it will be a handfull!
Oh I gotcha. Very well could be, but I've also spent a fair amount of time on a nearly 400lb. DR650 plodding through mud and various other gnarly single track, so I'm hoping I can handle a 240lb tw200, regardless of the front tire being marginally wider. Time will tell though lol
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