1983 CT70 Clean up and Preservation

JHminitrails

Well-Known Member
It's been awhile since I've posted a build/project, so I thought this 83 was a good one to share with everyone. The plan is strickly a preservation restoration, I'm not painting anything if I can avoid it. The post-1980 models were never on my radar, but I got this one for a good deal and it was in great shape and I could see the potential in saving it. It's very original with only 1000km on the odometer. It was dismantled years ago and obviously stored dry and well. It's missing a few bits like the tail light and bracket, which I've since found...Thanks @Tripod !! And needs the usual headpipe repair but the rest of the exhaust is super solid. Needs a seat cover and a few other small things. Tires are quite good with no cracking and are still pliable and soft, as well as all the other rubber parts.

So far I've deep cleaned the whole carcass and engine, dismantled it completely and got the frame compounded and buffed up to a satisfactory shine...ish. Did an initial quick assement on the engine and got it running with a spare carb I have. She fires right up and sounds good. I will dig deeper into the motor later and do all the usual maintenance inside, but for now it's a runner. All the hardware was in good shape and just scuzzy, so it's all soaking while I clean and polish other items. It's gonna turn out great in the end! Anyways, that's it for now.

As purchased pics.....
 

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JHminitrails

Well-Known Member
After a days work pics....
 

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JHminitrails

Well-Known Member
The compound and buff looks great! Did it rub off any of the decal color? It doesn’t appear so.
Thanks. It's amazing how some compound on a 3 inch DA can revive old faded paint. It did not damage the decals or remove any colour....it just made them look way better. 😁
 

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JHminitrails

Well-Known Member
Shocks cleaned up nice. Nice enough anyways. And if you're wondering, 3 to 4 zip ties will hold a CT70 spring compressed! Now I know that's not printed on the bags, but it's evident they just forgot it! 😁 Paint on the springs is a bit flakey, but its original. Top triple tree buffed up nice too. I know I said I'm trying to avoid painting any parts, but I have determined the brake pedal and the speedo/headlight cage are worthy of a repaint....sue me if it's wrong! 🤣 And the footpeg and side stand bracket will need paint as well.
 

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JHminitrails

Well-Known Member
Got a few more parts cleaned up this afternoon. I wet sanded the rear fender and headlight bucket with 2000 grit. They both had a slight bit of texture onbthe paint, and wet sanding before hitting them with the polisher brought them right up to a great shine and smooth finish. The front fender had a small crack on the rear corner. I heated it up with the heat gun to relax the bend in the corner, then used the soldering iron to weld the crack. Luckily the fender was in excellent condition otherwise, and I polished it up as well.

Also went through the harness and all the switches today and got all the contacts cleaned up and functioning. Turn signal and horn button were not working, kinda expected that.

Next on the list is tearing into the engine and cleaning the screen and slinger, and checking out the clutch and cam gears and chain.
 

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hambone

Active Member
@hambone I fly a few airplanes…Phenom 300 (profile pic), Falcon 900, Pilatus PC12. No one I fly for currently owns a Citation. 🛩️
Very cool, I used to dabble in flying, still get to a lot of airtime, my son is also a pilot, we cruise around in a TBM 940 and a Pilatus PC12, he loves the auto throttle in the 940. Sorry JHMT, didn't mean to hijack your thread.
 

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JHminitrails

Well-Known Member
Very cool, I used to dabble in flying, still get to a lot of airtime, my son is also a pilot, we cruise around in a TBM 940 and a Pilatus PC12, he loves the auto throttle in the 940. Sorry JHMT, didn't mean to hijack your thread.
I'll allow it....only because you hijacked it AND you're talking about planes....it just seems fitting! 🤣
 

JHminitrails

Well-Known Member
Of all the bikes I've restored, this is the only one that probably could have had nothing but an oil change, valves set and timing checked.....but I opened it up anyways. Compression test is 160psi. No major surprises....just surprisingly clean inside. Chain, gears, and clutch all look great. Oil screen and slinger was quite clean as well. Just a clean up, new gaskets and reassemble. Only real issue I found was a piss poor solder joint on the primary coil wire. But it was running before I tore it down.
 

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airblazer

Active Member
Is this your bike, or are you fixing it up for someone else? If yours, how did you come across it? What did you use to clean up the outside of the motor?
 

JHminitrails

Well-Known Member
Is this your bike, or are you fixing it up for someone else? If yours, how did you come across it? What did you use to clean up the outside of the motor?
It's mine. Purchased it privately locally. Found it posted on a classifieds site. I'm always prowling looking for bargains. I'm not sure if I'll keep this one or not...time will tell.

As for the engine. Started by covering up the intake, exhaust port and crankcase vent. Then multiple soaks, scrubs with spray 9, and pressure washer. Then followed up with a diluted mixture of AquaLum aluminum cleaner and again pressure washed. Nothing special. I get it at NAPA.
 

JHminitrails

Well-Known Member
Decided to tackle the seat refurbishment while I'm waiting for a few parts orders to arrive. The pan was my main focus tonight. There was the usual rust under the foam which had created a few soft spots and pin holes at the rear of the pan. Cut out the worst spot, made a template and cut and bent a nice patch out of some body metal. It was the same thickness so it worked out good. I clamped it in plate and slowly worked my way around with tack welds and moving the clamp at each tack. Once I was done tacking it, I turned the heat up and went over all the tacks to ensure there was no pin holes between tack welds. These old pans are pure garbage to work with....especially after rust eats away the already thin metal. But I finally got it all filled in and smoothed and blended. It isn't perfect, but this isn't a show bike! Nothing 47 coats of epoxy primer won't hide after a soak in evaporust.
 

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Tripod

Well-Known Member
Nice work on the pan. Id recommend fixing the shark teeth also if you plan on recovering the seat. Each tooth is important in making the vinyl tight.
 

JHminitrails

Well-Known Member
Nice work on the pan. Id recommend fixing the shark teeth also if you plan on recovering the seat. Each tooth is important in making the vinyl tight.
Thanks @Tripod. I did think of that already. Some of them are pretty weak. I may cut new ones in with a dremel beside the soft ones before I paint it, and pound the old ones flat, or pound the rotted clean off! 🤣

I’ll be interested in what the seat looks like after the evaporust soak and before the 47 coats of primer😂
Haha. Like they say in the drywall business..."More paint!!!" But in the case of the seat pan, it certainly can't look worse than it did. I don't really care if you see a few blemishes here and there. You never see it anyways. It will be fine.
 
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