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'73 CT3 Followed me home

16 Feb 2020 16:46
darinm
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'73 CT3 Followed me home #1
Guess I am a true addict now, wasn't even looking for a project as I've been hunting down an oil leak and fixing the kickstart on my CT2, as well as a longer ongoing project happening with it.

Low and behold a facebook marketplace suggestion caught my eye, about 60 miles away. No title, price too good (for California at least ;), Mileage is low, it has compression and it's actually quite complete if a bit weathered, original airbox came with it in a box. Paint is far from perfect but it's nice patina, and tank was just cleaned by a radiator shop. Kickstart has issues, but at least I am well practiced in that. Shame about the front fender but overall I can't complain.

The buddy seat isn't too common so if anyone is in the market give a shout as I'm ambivalent about it. CT3 colors are already growing on me.




1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS
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16 Feb 2020 20:49
johninga
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'73 CT3 Followed me home #2
Cool

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27 Feb 2020 17:09 28 Feb 2020 09:11 by darinm.
darinm
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'73 CT3 Followed me home #3
So little progress due to four flat tires on the XT225 and that's soaked up way too much time, finally just took the rear tire to the local shop today as I'd managed to pinch flat the last two tubes trying to install it. :Ugh

When I picked up the CT3 I was promised it turned over, but the kickstart had issues. Ah yes, the old clip I told myself. Got it home and it did turn over, but then it would catch and stop. Not good. Pulled off the clutch cover and the kickstart clip was sitting in the bottom of the case and very mangled. Still, the engine would only stop at a certain point while rotating the stator so I ordered a 26mm impact and kept my fingers crossed.

Sure enough, a missing tooth. Turns over fine now without the clutch basket.


Only 2,000 miles and the owner managed to do this? Can't figure out which clutch basket has the teeth :Ugh



I was just going to order all the parts from Partzilla as it's often not that much more than used parts, but oh my, those gears must be very nice!

1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS
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27 Feb 2020 17:29
Schu
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'73 CT3 Followed me home #4
Oh man, I'd've been all over that.
I need a 72, 73 & 74.
Got 70, 71, 75 & 76.
175s are truly my favorites as I gracefully grow old.....

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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27 Feb 2020 19:13
darinm
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'73 CT3 Followed me home #5
Ha if you were closer she would be yours it's the last thing I need right now.

1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS

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28 Feb 2020 17:13
darinm
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'73 CT3 Followed me home #6
Sourcing all the gears which have damage adds up pretty quickly, and there is a relatively local 1974 DT125 engine for $50 that I've committed to buying. Research indicates the kickstart related gears interchange; kick pinion, kick idle, and kick gear all have damage.

Wondering of the whole clutch basket assembly might be swapped over too, as the one with the built in kick pinion is not correct for this application I think?

If anyone knows I bet it's MarkT ;)

1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS

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28 Feb 2020 17:37
MarkT
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'73 CT3 Followed me home #7
I've swapped the newer "one piece" clutch basket into the older models that had the "removable" starter gear... IIRC the key is if the bushing is the same part you can swap the baskets.

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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05 Mar 2020 22:04
darinm
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'73 CT3 Followed me home #8
So it's a forecast of 83 and sunny, and the '74 DT125 engine is about 40 miles away. Being an optimist, a quick glance at the CT engines and I'm on the road. It looks like it'll fit in the rear soft luggage for the BMW F650GS and worse case, I can take the car another day. It's a tight fit, but the engine just squeezes in, with a few cam straps to help hold it in place as the top does not close over the cylinder. It may not be light but the BMW 650 gets better mileage than the CT2 :ROFLOL


Impact hammer is necessary for getting the clutch cover of the DT125 engine, but all the kick related gears look immaculate.


I'm always curious to know why a bike was parked, and I'd guess this stripped oil pump gear had something to do with the '74 DT125 being parked. Plus the seller of the engine said the frame was bent and he bought it just for the gas tank, so it's nice not to be robbing a good bike of an engine.

1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS
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05 Mar 2020 22:12 06 Mar 2020 09:35 by darinm.
darinm
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'73 CT3 Followed me home #9
Interesting to see the differences. Clutch basket fit perfectly into the CT3, everything between the two is identical regarding the clutch basket, except for the teeth on the probably not correct CT3 one.

Idler gears, CT3 on the left with what appears to be a hardware store washer and bent circlip.


Other side is more different than I'd expect considering the same partzilla number for both engines.


Kick pinion gear looks the same, CT3 on the right with the missing tooth.


Kick assembly is identical, but the CT3 has a lot of wear. For a 2,000 mile odometer it sure had a lot of damage and wear to everything in the kick assembly and gearing.


So, all the new old parts installed well and the kickstart is working perfectly. The CT3 has no spark. Tried a new spark plug, cleaned the points, sanded and cleaned ground connection. Lots to learn here as this is the first one I've worked on with no spark.

1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS
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06 Mar 2020 18:52 06 Mar 2020 18:54 by darinm.
darinm
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'73 CT3 Followed me home #10
I was pretty worried about no spark as I'm not electrically inclined. A Fluke 77 was handed down to me by a friend who worked as an engineer, it was thrown away at work because the button to lock modes broke. Armed with that and too much forum reading and confusion, I was able to check continuity from the condenser and points to the spark plug cap. Removed the harness ground, sanded to fresh bare metal and reinstalled that. Still nothing, checked the coil and ohms looked good from my limited knowledge. Removing the gear selector lever was a hassle as they PO had broken off the bolt in it, eventually got it drilled out and the whole flywheel cover off to look for bad wiring. Noticed the flywheel and coil magnets were a bit rusty as the bike had been sitting outdoors for years with no gasket for the flywheel. A little 400 grit sanding mesh cleaned them up decently well - the sanding meshes are amazing if you have not heard of them. Had already unplugged the key. Decided to kick it over and there was a spark, plugged the key back in and the spark is still there. Looks like it just needed to be cleaned, love the simplicity. Sounds like ten minutes but it was a few hours because of getting stuck on reading about what could be wrong instead of finding what was wrong.

Next up, clean the carb and see if she will fire up and proceed with new tires and other bits if all is looking good.

1972 Yamaha CT2 175
1972 Yamaha RT2 360
1972 Suzuki TS 185 Sierra
2001 BMW F650GS
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