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1974 DT360 Disassembly and Restoration

30 Aug 2019 20:25 30 Aug 2019 20:28 by pabdt.
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1974 DT360 Disassembly and Restoration #11
Oh boy, just got the rear swing arm off. The zirc fitting is 45 years clean. Swing arm practically stuck in one position.
Rear tail light assembly is destroyed. Guy used JB weld to put it together. As I disassemble this bike, I see that only at the deepest level am I finding stock bolts. Rear fender dented but repairable.

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Can't believe this bike has great spark. He did put a new source coil on it before I got it. Which way do I turn that bolt to remove the magneto? Left to loosen, right tighten?

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Good news is motor has virtually no vertical moving on rod and I tested trans, so I will probably not split the engine.
Plan to replace seals and clean up everything else though. Thinking 12v replacement setup.

74 DT 125 #2
74 DT 125 #1 Sold 1977
74 DT 360
05 CRF 450R
18 R1
02 Z06 N/A 648RWHP

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30 Aug 2019 23:31 30 Aug 2019 23:37 by Gr8uncleal. Reason: more text
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1974 DT360 Disassembly and Restoration #12
Pretty sure that's a standard right hand thread, so left to loosen.

The flywheel/magneto centre has a left hand thread in it (probably 27mm) and it is standard practice to use a flywheel puller to remove it.

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31 Aug 2019 12:34 31 Aug 2019 12:34 by pabdt.
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1974 DT360 Disassembly and Restoration #13
the frame and swing arm appear in good condition and straight but the bars are gone

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note to self, apply grease to shaft even though no contact points. Should this be generally packed w/grease to drain to lower ball bearings?

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bike born in 73. numbers match frame and engine. #446-004427
where can I get a replacement decal like this?

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74 DT 125 #2
74 DT 125 #1 Sold 1977
74 DT 360
05 CRF 450R
18 R1
02 Z06 N/A 648RWHP

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31 Aug 2019 15:03
MarkT
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1974 DT360 Disassembly and Restoration #14
DEET for the decal.

I recommend checking rod big end bearing by correct procedure in service manual...

Compression might have been low due to compression release if it was working or leaking.

1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

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31 Aug 2019 17:16
pabdt
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1974 DT360 Disassembly and Restoration #15

MarkT wrote: DEET for the decal.

I recommend checking rod big end bearing by correct procedure in service manual...

Compression might have been low due to compression release if it was working or leaking.


CR not connected during testing. I'm leaning towards tearing it apart for inspection. At a min, I'll check out that procedure. Thanks.

74 DT 125 #2
74 DT 125 #1 Sold 1977
74 DT 360
05 CRF 450R
18 R1
02 Z06 N/A 648RWHP

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31 Aug 2019 18:30
Snglsmkr
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1974 DT360 Disassembly and Restoration #16
The flywheel nut is certainly a righthand thread. There is a close fitting washer under it that needs to be slid off the crankshaft before the puller is installed in the flywheel.

It is not unusual for moisture in the crankcase to cause corrosion of the crank bearings. Does the crank rotated smoothly? If not they may need replacement.

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02 Sep 2019 17:58 02 Sep 2019 18:00 by pabdt.
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1974 DT360 Disassembly and Restoration #17
hub/bearings appear in good shape. need to inspect closer especially seals.

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pulled apart rear wheel today. plan is bead blast, polish, new spokes. trying to decide if I want to keep these wheels or put some Excel rims on it. Will know more after cleaning/polishing them.

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before disassembly

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74 DT 125 #2
74 DT 125 #1 Sold 1977
74 DT 360
05 CRF 450R
18 R1
02 Z06 N/A 648RWHP

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03 Sep 2019 18:45
pabdt
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1974 DT360 Disassembly and Restoration #18
starting cleaning the head today...found a chip in fins I didn't see before. anyone have a spare head? I can always install and use it until I find one.

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can see where someone had previous went in and scrapped up the combustion chamber, though not bad.

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74 DT 125 #2
74 DT 125 #1 Sold 1977
74 DT 360
05 CRF 450R
18 R1
02 Z06 N/A 648RWHP

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04 Sep 2019 03:54
Schu
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1974 DT360 Disassembly and Restoration #19
I had the same thing on my 360. I just reshaped the broken fin.

Schu

70 Yamaha CT175
71 Yamaha CT175
71 Yamaha JT60
72 Yamaha JT60 (2)
74 Yamaha DT360
75 Yamaha GT80
75 Yamaha DT100
75 Yamaha DT125
75 Yamaha DT175
76 Yamaha DT175
75 Yamaha DT250 (2)
75 Yamaha DT400
76 Honda Z50
17 Yamaha SCR950

"Someday, you'll own some Yamahas"

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04 Sep 2019 15:08 04 Sep 2019 15:40 by pabdt.
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1974 DT360 Disassembly and Restoration #20
nice sculpturing Schu... I may be able to do the same.

Update: working on cleaning the frame for paint and bead blasted a small section of the hub to see what it would look like.
Hub looks great. Think I will be polishing the hubs fully though.

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Can one you guys w/a 360 look at the right foot peg(frame inverted) and tell me if the weld angle looks correct. Also, kickstand bracket looks twisted.

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74 DT 125 #2
74 DT 125 #1 Sold 1977
74 DT 360
05 CRF 450R
18 R1
02 Z06 N/A 648RWHP

Please Log in or Create an account to join the conversation.

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