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Old 07-18-2013, 07:41 AM   #1
moto-scoot bill OP
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Location: milwaukee---you know---H.D. country
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DT/MX400 street tracker build

the big bore DT/MX400 street tracker is getting close to completion, and details will follow when the bike gets buttoned up, but here is a start, and a brief look into this build.
we started with a 1975 DT400 and with our background on working with these old 2-strokes, we knew they were de-tuned out of the box. the beauty of the DT400 is that it shares the same bottom end as the Yamaha MX400.
OK, let's throw a 38 mikuni, a HOT power dynamo ignition with very light fly wheel, MX 400 top end, refurbished crank from Mr. Crankshaft, genuine Yamaha PISTON overbored, sweet pipe from Circle F, all new everything else inside and out....clutch, seals, bearings, wiring, you name it, and it was replaced with nos parts.
also added was a couple of inches to the swing arm by Frame Crafters with some cool adjustable mounts. YSS is the rear shocks of choice, along with special made alloy wheels with Buchanon laced stainless spokes polished like the rims.
the original gas tank is going back on, and the Hot Wings seat is getting painted to match. the seat will hide the light weight plastic Tomos moped oil reservoir with oil indicator sending unit, so we will know by a blinking light on the controls when the oil is getting low.
the Power Dynamo ignition is run without a battery, so the whole underside of the seat pan will remain clean and you will get to see the big K&N filter.
tires of choice are vintage pattern from Hiedenhau.....the rest will follow when we get closer to firing her up for the first time. until then...CHEERZ!
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Old 07-18-2013, 07:48 AM   #2
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CIRCLE F exhaust for the DT/MX400

THE PIPE IS FROM CIRCLE F....THE GUY WORKED AT JEMCO FOR YEARS....BEAUTIFUL.
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Old 07-18-2013, 08:07 AM   #3
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Sweet pipe

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Old 07-18-2013, 08:23 AM   #4
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Kenny on the yamaha 400

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Old 07-18-2013, 10:16 AM   #5
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power dynamo ignition

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Old 07-18-2013, 10:20 AM   #6
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rebuilt crank from MR CRANKSHAFT in kentuky

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Old 07-18-2013, 10:27 AM   #7
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lunch break

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Old 07-18-2013, 12:04 PM   #8
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Quality stuff Bill! That is going to be thoroughly fun and anti-social to ride. Looking forward to see it develop.

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Old 07-18-2013, 01:22 PM   #9
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controls for the DT/MX400

we used the Flanders handlebars and a sweet all in one dirt bike switch, and Magura levers and Renthal grips
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Old 07-18-2013, 01:28 PM   #10
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YSS shocks and extended swingarm

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Old 07-18-2013, 01:41 PM   #11
moto-scoot bill OP
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CIRLE F exhaust got light weight

this bike shed allot of weight and one of the big gains was this pipe. along with the switch to alloy wheels, alloy rear sprocket from Sprocket Specialist, the plastic oil reservoir, loose the fenders, tiny tail light and alloy turn signals, fiberglass seat pan, on top of the magnesium engine and hubs......I will weigh it when it is finished, but it rolls easy.
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Old 07-18-2013, 01:54 PM   #12
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everything replaced with new

every seal, bearing whatever would come apart was replaced. all wiring will be new custom built. even key ignition is NOS......Yamaha fork brace going on next
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Old 07-18-2013, 02:10 PM   #13
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wow! Looks great already!
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Old 07-27-2013, 06:50 PM   #14
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2-strokes rule the roost

getting closer to completion, with body work just back from decal shop. but for now it is happy kicking back with a few 2-stroke brothers from the 70s.
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Old 07-28-2013, 05:52 AM   #15
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Quote:
Originally Posted by moto-scoot bill View Post
getting closer to completion, with body work just back from decal shop. but for now it is happy kicking back with a few 2-stroke brothers from the 70s.
very nice work Is that Suzuki a 550? I can't tell
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