DT175(mx?) restoration - slow

mudcow007 · World Chat Champion Joined: 01 Feb 2012 Karma :

i was given an old DT175 last week to see if i coudl do anything with it

i suggested scrapping it but the previous owner wouldnt hear of it

its in a bad way

https://i25.photobucket.com/albums/c81/mudcow007/20130831_193643_zps2777bd73.jpg

https://i25.photobucket.com/albums/c81/mudcow007/20130831_193648_zpsb6b7456e.jpg

https://i25.photobucket.com/albums/c81/mudcow007/20130831_193653_zpsc67af210.jpg

https://i25.photobucket.com/albums/c81/mudcow007/20130831_193700_zps8d22d34d.jpg

the plan is to see if i can get the engine going as cheaply as possible. if the engine lives i will start to (hopefully) bring it back to life.

i think its going to be a full engine teardown. im told 2 strokes are the most simplest creatures in the world though

frame so far seems to be ok, the swing arm is in a bad way though

engine is now out (only 2 bolts holding it in)

https://i25.photobucket.com/albums/c81/mudcow007/20130903_202146_zps38afd02b.jpg

carb is in a bit of bad way

https://i25.photobucket.com/albums/c81/mudcow007/20130906_153815_zpsd6d31e8a.jpg

anyone got a mikuni carb that i can take bits off?

clutch lever on this has snapped

pepperami · Super Spammer Joined: 17 Jan 2010 Karma :

Looking at those pictures , I`d say there`s life in that bike yet.

I used to play Motoball and our bikes would be in a lot worse state than that before we got rid of them.
Even if it cant go on the road again , it might have some life left in it as an off-roader?

Looks like you need to spend some time at a bike auto-jumble Thinking

DT 175`s are/were great little bikes and are getting few and far between nowdays.
It would be a crying shame for it to be scrapped Crying or Very sad

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mudcow007 · World Chat Champion Joined: 01 Feb 2012 Karma :

cheers pepperami

i think it looks a whole lot worse than it is (hopefully)

the worrying bit is the missing bits

The rims are ally so, i hope to rebuild them - i have rebuilt pedal bike wheels so im hoping its just a bigger version of that

ideally i would like to make it road legal, i dont think its ever been on the road though

numbers match on the frame & engine.

i dont know of any way to do a check to see if its legal?

the bloke i got it off said its legit etc, plus i know him..

im told you have to speak to the heritage club or something an they will give you a letter to verify its age which you then take to the dvla about getting a age related plate etc (thats a million miles off though)

stevo as b4 · World Chat Champion Joined: 17 Jul 2003 Karma :

Just my opinion, but I wouldn't bother trying to get the engine running after all this time stood around with no exhaust. Just decide if your going to stand the budget of a full motor re-build, and hope that the cases and transmission shafts and gears are re-usable. All bearings, seals and gaskets will need replacements IMO.

I'd be much more concerned about de-rusting the frame and the swinging arm, and see if you have got solid enough metal underneath. You will need at least one other tatty part complete donor bike to make it realistic to bring this back to life, as sourcing all of the individual missing parts to renovate and fit will be prohibitively expensive.

I've always found it strange how many people try to get old non runner's to start before they take them apart anyway to fully re-build. Maybe I'm missing something though?

mudcow007 · World Chat Champion Joined: 01 Feb 2012 Karma :

well, i was thinking if i can make it run then at least the engine an box are good etc

i would hate to shell out on bearing n' seals to find the engine is dead

worrying the kick start shaft just turns with little resistance

gear selector moves a few mm

i haven't tried to force any of them to move etc

i think i will just break the engine down an see what i find (my first engine tear down)

the thing that is seriously worrying me is the rusted solid fly wheel. god knows what its like behind it

evoboy · World Chat Champion Joined: 20 Aug 2009 Karma :

Carb looks to be mikuni.

Similar to alot of 80's Suzuki 2strokes. What diameter are the openings?

Rebuild the engine anyway. 2strokes dont take much work to run as there are barely any internal components compared to a 4stroke. But trying to make it go in that state may make your job harder...
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evoboy · World Chat Champion Joined: 20 Aug 2009 Karma :

Carb looks to be mikuni.

Similar to alot of 80's Suzuki 2strokes. What diameter are the openings?

Rebuild the engine anyway. 2strokes dont take much work to run as there are barely any internal components compared to a 4stroke. But trying to make it go in that state may make your job harder...
____________________
Suzuki GT250 x7------- Fazer 600------CB250RS------Aprilia Rally 70----- Bandit 600

APT Motorcycles

pepperami · Super Spammer Joined: 17 Jan 2010 Karma :

If it was mine , every orifice would get a really good dollop of diesel .
And a daily wiggle of anything that was supposed to move for a week or two before trying to get anything off it.
If it was mine it would get a great dollop of diesel in the exhaust port.

I would worry about seeing if you can get things moving first.

I once had a Bultaco Sherpa in the same condition as that and I was able to get it going as a tatty bus Thumbs Up

It had stood for 7years before I got it and the exhaust was off.
I did the diesel trick and luckily for me it did free up and I was able to get it going.

EDIT : What? aren't all bikes supposed to look like that when the likes of us get to ride em??
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I am the sum total of my own existence, what went before makes me who I am now!

mudcow007 · World Chat Champion Joined: 01 Feb 2012 Karma :

good idea about the diesel, i have a readily supply of kerosene, could i use that?

im thinking of just filling the container the engine currently live in with diesel/ kerosene for a few weeks - or is that ridiculous

obviously i wont be trying to start it covered in diesel/ kerosene!!

quite a few parts have appeared on gay-bay recently for DT's

fingers crossed i can start to rebuild the wee beasty

openings on the carb are 3cm & 4cm is that a common carb?

there are spanking new ones in the good ol US of A for £50 odd.

id quite like to use as much as the original stuff as possible.

i stripped the foot pegs off the frame this weekend, the return springs have corroded into the pegs!! Shocked

UnspeedySam · World Chat Champion Joined: 25 Nov 2009 Karma :

I read somewhere, but it could well be utter crap, that the DT175 engine is pretty much the same design as an RXS100 one. If that's the case it should be stupidly simple to rebuild.

I wouldn't have too much problem with starting it with diesel all over. the moving components, it's not super flammable like petrol and as long as you keep it off electrical stuff it'll be fine anyway.
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Riding: BMW R1150RT `02 bought mildly crashed
Fixing: Also the BMW as I get less broken bits
Gone: ZZR600 '00, TRX850 '97, RXS100 '93, JS125-6B '07, BMW R1100RS '93, Kawasaki ZX-6R-J2 '01, Honda Bros NT400 NC25 '88

stevo as b4 · World Chat Champion Joined: 17 Jul 2003 Karma :

The DT shares no real engine design similarities with the RXS100, other than the layout, but it is very closely related to the TY175 trials engine, and the IT175 enduro. bike. The early YZ125's have the same shape engine casings too, and the design is similar across the DT100-DT400 engine range.

A very good air cooled steel linered motor with cylinder mounted reedvalve or (torque induction).

IT175 top end and carb, exhaust parts can be fitted to the DT175 cases, and I think the IT was about 24bhp? The TY engine appears to be the same but with a different non radial head and a 2mm smaller carb, along with of course a different exhaust system.

UnspeedySam · World Chat Champion Joined: 25 Nov 2009 Karma :

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

175 thing has different studd spacings to rxs, there's a yz125 head and barrel on an rxs engine that does the rounds on ebay, so that must fit somehow
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pepperami · Super Spammer Joined: 17 Jan 2010 Karma :

mudcow007 · World Chat Champion Joined: 01 Feb 2012 Karma :

cheers mr pepperami

i will give it a blast

im just in the process of getting rid of my CG so i need that gone before i can tinker with the DT (no room in my shed)

spikenipple · Crazy Courier Joined: 20 Nov 2007 Karma :

Do you want to buy a complete DT125 front end? I picked it up at Beaulieu on the weekend. It's from a disc model. Includes yokes, forks, wheel, disc, caliper, hose, master cylinder and the mudguard if you want it.

Not looking for a great deal of money for it.
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C50 > GN250 > XJ600 > SV650S K7 > 2001 RSV Mille R > MT-09, XR400R > 2005 Fireblade (trackbike) + 2022 MT-09 + ZXR400 race bike