Author Topic: Will a twin shock Dt175 accept an early monoshock engine?  (Read 405 times)

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Offline DJPresto

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Will a twin shock Dt175 accept an early monoshock engine?
« on: January 03, 2018, 02:11:41 PM »
Just wondering if the later model 78, 79, 80 etc monoshock engines will fit into the earlier twin shock DT frames? Thanks
Triumph Speed Triple 1050, Husky XC430 1982, Husky WR240 1985, GSX1100ez, Husky CR250 1975

Offline Slakewell

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #1 on: January 03, 2018, 07:28:41 PM »
Yes angle grinders and mig welders are wonderful
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Offline djr

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #2 on: January 03, 2018, 09:39:58 PM »
I have a twinshock DT175 bike  , a few years ago I had a mono shock DT175 engine and looked at doing what you suggest
as far as I can remember the mountings were not even close to lining up and I abandoned the idea.
{ I don't think there are even many interchangeable parts between engines }
However as has been suggested , if you can cut & weld then anything is possible.

To clarify - the bike I have is a DT175C , but  I didn't know the exact model year of the  monoshock type DT175 engine I looked at fitting

the DT175A,B,C  engine cases  do look visually the same as TY175/125 and YZ125C,X ,  but I think the YZ & TY are all 6 speed {could be wrong} whereas the DT175ABC are 5 speed , so I don't know if cases are different internally to suit the extra gear ?
 over the years I have had all the different engines , but never really got round to seeing what was interchangeable apart from clutches , which I found there was quite a few different ones .

« Last Edit: January 04, 2018, 12:15:17 AM by djr »

Offline David Lahey

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #3 on: January 03, 2018, 10:12:41 PM »
I know that the early monoshock DT175 (EFG) motor will fit in a TY175 frame except for needing a small dent in the bottom frame rail where a screw head lug sticks out a bit under the magneto.
I've got a DT175A motor here but have not yet tested it for fit in a TY175 frame. I had assumed until now that a DT175 ABCD motor would also fit in a TY175 frame. The TY175 motor is a variant on the YZ125C and YZ125X
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Offline TT5 Matt

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #4 on: January 03, 2018, 10:43:45 PM »
A it175d goes into an dt175b or c twin shock frame even though some on here said it would need altered front mounts which it didnt

Offline LWC82PE

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #5 on: January 04, 2018, 09:44:06 AM »
Might work if you are building a special?

https://www.ebay.com/itm/1982-1983-Yamaha-YT175-Tri-Moto-NOS-DG-Cylinder-Head-TriMoto-ATC-YT-175-82-83/182993166315?hash=item2a9b3e1feb:g:0-4AAOSwPCVX6qd~&vxp=mtr

when this head was first listed on ebay a few yrs ago the asking price was well over $500 USD. slowly it has been comming down in price  :)
Wanted - 1978 TS185 frame or frame&motor Frame # TS1852-24007  up to TS1852-39022 $$$ waiting

Offline OverTheHill

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #6 on: January 04, 2018, 10:37:11 AM »
I was thinking the mono dt175 engines had the swing/arm bolt through the back of the case but looking on partzilla apparently not!!. I'm sure i spouted ages ago about the trouble we had at work with 'S/arm bolts' stuck in the case, so now i'm buggered if i know what i was thinking of, but happened on something [farm bike] pretty regular. Must've been stuck in the spacer through the 'mono' S/arm & had to drill in from both sides to clear the frame--took a wile & lots of drill resharpening lol plus a realy big slow drill we had for honing cylinders or something, big bugger with a handle out each side to push on. All because of lack of lubing on assembly pretty much.

Offline 80-85 husky

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #7 on: January 04, 2018, 02:42:32 PM »
farm bike cow piss = angry mechanic ;D

Offline DJPresto

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Re: Will a twin shock Dt175 accept an early monoshock engine?
« Reply #8 on: January 05, 2018, 03:20:43 PM »
Thanks for the serious responses.
Triumph Speed Triple 1050, Husky XC430 1982, Husky WR240 1985, GSX1100ez, Husky CR250 1975