DT175MX - Too far gone?

[Vincent]

[Vincent]

Saw this and thought of this thread:-

https://www.ebay.co.uk/itm/Rare-Yamaha-DT175mx-running-project-or-restoration-spares-or-repair-barn-find-/311467534015?

The reserve could be rediculi I guess.
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Space Is Deep

[mudcow007]

Cheers Vincent, only just seen the ebay listing an missed it

tried to pop the barrel off last night using a similar setup to yours an all I achieved was a hole in the piston


My setup is basically the same as yours except i used a bar of brass (1/4" thick) tapped with 8mm bolt which screws through the bar to the piston with the idea of just popping the barrel off

After i "holed" the piston, the only thing i had to put under the bolt on top of the piston was a 50p coin - which ended up with a 8mm hole through the middle of it (dont tell the queen)

any ideas anyone!!?

[Pete.]

[Matt B]

[mudcow007]

[Pete.]

[Vincent]

That was my fault for giving OP ideas without explaining the method properly What you could have done with, is some sort of block on top of the piston.
It's not the end of the world as the piston would be scrap anyway I'd have thought, (along with a good few other parts), it just means thinking of something else to push against if pulling the barrel off rather than trying to pry it off.
It may be "misson impossible" to get this poor machine back in running order, (although I've seen similar and even worse restored), but as OP states early on, stripping down something like this is all good practice and fairly educational, and if the barrel's not too bad and hasn't had too many rebores already, it must be worth a few quid, same with the frame and engine cases if there's a log book.
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Space Is Deep

[Matt B]

[Vincent]

[mudcow007]

cheers for the replies, the only thing im really interested in is the barrel (an possibly RH case - see earlier in this thread) so the rest of it is scrap - its in a state...

If i'm honest im shocked how thin a piston is, I always thought they were a bit thicker...but hey ho

I've got another complete engine minus the barrel...so just trying to do the old switcheroo.

I understand this bike is a mess, but at the moment its cost me next to nothing so its still really just a (steep) learning experience/ experiment

[Vincent]

[mudcow007]

yeah i think there is 6 or 7 of em

piston that i holed, is a 0.75 so looks like its had a rebore at some point, but what 2 stroke hasn't?

another thing is i don't know if its stuck in gear as well as i couldn't move the selector at all - if that would make a difference....suppose it would if your trying to move the crank

I do enjoy a bit fo challenge but this is getting a bit heavy!!

[bladerunner]

Piston and conrod will likely be scrap anyhow so I wouldn't worry about that as they ain't expensive to replace.... I've had to cut through conrods once freeing or destroying a piston enough to allow enough movement. Is it stuck at the top of the stroke?
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[mudcow007]

barrel removed an quickly snot blasted

https://i25.photobucket.com/albums/c81/mudcow007/Mobile%20Uploads/20160516_153956_001_zpsnxaoxnt3.jpg

someones "handy work"

https://i25.photobucket.com/albums/c81/mudcow007/Mobile%20Uploads/20160516_160738_zpsg97z98w2.jpg

[mudcow007]

No pictures to add, but just bought a replacement swingarm and engine bashguard

not bad for £20 for the two of em

big bits im still to find:

tank
oil tank
metal work for mud guards
possibly replacement forks stanchions - mine are rusty but high up not by the sliders

millions of bits n bobs

I can see the tank being a bit of a struggle...

[UncleFester]

https://www.ebay.co.uk/itm/1975-Yamaha-Enduro-DT-175-oil-tank-And-Battery-Box-/282051988979?hash=item41ab9bcdf3:g:8cUAAOSwn8FXSjIo

https://www.ebay.co.uk/itm/1978-78-YAMAHA-DT175-DT-175-Gas-Tank-Fuel-/361611120999?hash=item5431b3d167:g:x3cAAOSwGIRXatxg

looks like USA is a good place to start - might get a good deal on a bundle of stuff?
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Module 1 and 2 passed - October 2014. Happy owner of a 2017 Z1000SX, ex owner of a YBR125 / CB500 / VFR800.

[Suntan Sid]

[mudcow007]

Awesome cheers Sid!

Will try an measure mine tonight




Cheers Fester, Mine is a 175MX which has an internal (plastic) oil tank. these don't seem to come up much.

I have found Germany has quite a few bits..

Just a bit worried that it will be the wrong part as there seems to be loads of different variants of the bike

[mudcow007]

Swingarm has arrived an its slightly different to mine

Weirdly it doesn't have the "sticky out bit" for the drum brake to grab on, or disk brake mounts....even more weirdly there are no signs of either of them being ground off

[NutsyUk]

Just my 2 pence worth...

Tbh I dont think this is a bike rebuilt tbh. The amount of work needed to be done on this you might as well build a new bike from scratch.

Even the frame looks totally unsafe and rusted through
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Yamaha FZ8/Fazer800 (split headlight one) 2014, gingerly getting used to the massive increase in HP and not killing myself in the process! That was easy to get used to.
Kawasaki ER6F 2007 650 Gonna sell as a project bike!
Lexmoto XTR S 125 Sold!

[mudcow007]

woohoo

https://i25.photobucket.com/albums/c81/mudcow007/20160802_164520_zpstgahwjfn.jpg

[Sean.S]

[mudcow007]

Cheers, to be honest im enjoying the hunt for parts at the moment, there seems to be plenty of them around an it is possible to pick up bargains

like that swingarm was £25 it looks crusty when i got it, but shot blasted it in an work now it looks a tiny bit less scabby

Im in no rush to get it built, i still need loads of parts anyways - tank, oil bottle, air box etc.....