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Author Topic: Yamaha TW200.. the swamp donkey  (Read 5658 times)

Online Hurco550

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Re: Yamaha TW200.. the swamp donkey
« Reply #30 on: May 18, 2018, 17:00:13 »
That engine looks a hell of a lot like a sr250 so that might be an option as well.
They say the sr185 head will work, but no mention of the sr250

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"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline Brodie

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Re: Yamaha TW200.. the swamp donkey
« Reply #31 on: May 18, 2018, 17:05:12 »
Fair enough. I have a spare sr250 cylinder I can measure if you need.
I'm not sure, but don't ask Brodie.

Way to many build and half done projects to list here.
Sr250, Gs750, Z50A, XV1100, A10, Z160A.

Online Hurco550

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Re: Yamaha TW200.. the swamp donkey
« Reply #32 on: May 18, 2018, 17:12:16 »
Fair enough. I have a spare sr250 cylinder I can measure if you need.
I may take you up on that! Much thanks!

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"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline der_nanno

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Re: Yamaha TW200.. the swamp donkey
« Reply #33 on: May 19, 2018, 04:13:39 »
Do you have the ID and OD of that bushing? I mean it doesn't look too bad and throwing a ball-bearing in, shouldn't be the end of the world or have I missed out on another failure?
Real freedom starts with the freedom of thought.

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Online Hurco550

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Re: Yamaha TW200.. the swamp donkey
« Reply #34 on: Jul 11, 2018, 01:36:24 »
 So after some more digging through the motor, I just found way to many shavings and other unsavory chucks of metal. I decided to jettison the stock lump in favor of a predator 212cc with a torque a verter clone, and just end up with a big ol fat tire mini bike/ pit bike.

Here's the engine sitting roughly where it'll go.


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"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Online Hurco550

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Re: Yamaha TW200.. the swamp donkey
« Reply #35 on: Jul 11, 2018, 01:38:44 »
During my mid Ohio swap meet adventures, Mr.E made a stupid impulse decision and bought a $10 steel Honda atc tank. Worked out well for me, because between that and the $5 Yamaha dirtbike seat, this thing will be sitting pretty.

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"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Online Hurco550

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Re: Yamaha TW200.. the swamp donkey
« Reply #36 on: Jul 11, 2018, 01:42:48 »
The rear subframe has a weird drop seat  Style Bend in it which did not work well with the flat bottom vintage dirt bike seat, so after a couple hours of cutting and de tabbing the frame along with bending up some 1/8" wall 3/4" inch OD tubing, I have a subframe that fits much better. I left the frame a little long until I decide what I am doing to mount a fender and possibly a luggage rack. There will be more bracing added, but the basic shape is there.

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« Last Edit: Jul 11, 2018, 01:44:52 by Hurco550 »
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline advCo

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Re: Yamaha TW200.. the swamp donkey
« Reply #37 on: Jul 11, 2018, 02:20:59 »
Shwing!


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74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
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74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
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'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0

Online Hurco550

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Re: Yamaha TW200.. the swamp donkey
« Reply #38 on: Jul 11, 2018, 23:31:14 »
Ran out of mig wire while trying to finish up the sub frame, so I decided that I'd wire wheel the paint off of the tank. That is where I found this tasty morsel. Looks like I'll get plenty of practice pulling dents I guess lol

Sent from my SM-G920V using Tapatalk

"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline cbrianroll

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Re: Yamaha TW200.. the swamp donkey
« Reply #39 on: Jul 12, 2018, 01:36:26 »
Dang! How thick is that filler?

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