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Blood Sweat Tears and Grease => Projects => Specials => Topic started by: scott s on Oct 24, 2017, 09:56:52

Title: '71 CT70 ....boneyard special
Post by: scott s on Oct 24, 2017, 09:56:52
 I pulled this out of the local bike boneyard yesterday. It's rough as a cob, but for only $40 I couldn't resist.
 Almost everything on it is stuck, rusted or rotten, but all I really wanted was the frame and some hardware.

(http://i190.photobucket.com/albums/z189/uberkafer/22687737_10210663913300089_5102854445922446945_n_zpslctsimni.jpg) (http://s190.photobucket.com/user/uberkafer/media/22687737_10210663913300089_5102854445922446945_n_zpslctsimni.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/22789088_10210663914020107_2161372574981795415_n_zps0wxrydxo.jpg) (http://s190.photobucket.com/user/uberkafer/media/22789088_10210663914020107_2161372574981795415_n_zps0wxrydxo.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/22730248_10210663914900129_976302681966787306_n_zpsuz6qokar.jpg) (http://s190.photobucket.com/user/uberkafer/media/22730248_10210663914900129_976302681966787306_n_zpsuz6qokar.jpg.html)

 So far, all I've done is dragged it into the garage....because it won't roll...and sprayed everything with PB Blaster in preparation for disassembly.

 I have lots of questions and could use some guidance. Below is a list of things I'd like to do and a couple of pics for inspiration. Anything you can tell me is appreciated.
 I'd like to do:

 * Fork swap. USD or conventional hydraulic?
 * Front disc
 * Aluminum swing arm, probably the extended one. What do you do about the brake rod and stay with the extended arm?
 * 12" wheels. I re-use my old rear hub. Do the disc swap front hubs accept the 12" hoops?
 * Big motor....140-160cc. Would also like some suggestions on brands/size for this. Lifan, Piranha, SSR, etc.

(http://i190.photobucket.com/albums/z189/uberkafer/IMAG0034_zpshzyvuaxu.jpg) (http://s190.photobucket.com/user/uberkafer/media/IMAG0034_zpshzyvuaxu.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/Mp2JPFc_zpsvlakiemv.jpg) (http://s190.photobucket.com/user/uberkafer/media/Mp2JPFc_zpsvlakiemv.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Oct 24, 2017, 09:57:18
It's surprisingly hard to work out all the details on this type of build. I'm on PlanetMini's and LilHonda forums, some Facebook groups, etc. It seems that a million people have done thises things but getting actual answers is tough. Maybe it's some sort of secret society... "The first rule of custom minis....".
Title: Re: '71 CT70 ....boneyard special
Post by: 1fasgsxr on Oct 24, 2017, 13:36:17
Those inspirations are bad ass!  I will definitely be following this.
Title: Re: '71 CT70 ....boneyard special
Post by: Tim on Oct 26, 2017, 00:50:41
I'd stick with a stock restoration to be honest.  Having done a GSXR front end swap onto an SR500 I wouldn't waste my time or money doing it again.

They're fetching top dollar in stock form.  I'm embarking on rebuilding my ST90 this winter and planning on going full stock restoration except I'll likely put a Lifan engine in.  The stock motor runs but needs refreshing and I want something clean and reliable.
Title: Re: '71 CT70 ....boneyard special
Post by: clem on Oct 26, 2017, 11:09:58
Check out places like CHP, T Bolt etc. For parts. They do make inverted forks for the CT's but is it necessary? Probably not but it does look cool.

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Title: Re: '71 CT70 ....boneyard special
Post by: Rat_ranger on Oct 26, 2017, 11:11:59
If you swapped forks they would have to be off a pit bike, any sport bike front end would be miles too long and way to heavy.  And then you could just use pitbike disks.
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Oct 27, 2017, 00:02:34
 To cover a few things....

 No way this is worth restoring. I basically have a frame and some hardware.
 That's why I'm looking at fork replacement. It'll be easier to swap that fix what's there.

 And rat_ranger, I'm not talking about "real" bike forks. There are USD fork kits made specifically for these bikes.
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Oct 28, 2017, 07:53:38
 Stripped down the CT70 yesterday. There's ALWAYS a rat's nest inside old bikes somewhere. And I probably got 5 lbs. of loose rust and dirt out of it.

(http://i190.photobucket.com/albums/z189/uberkafer/dirt_zpsxfd4gfke.jpg) (http://s190.photobucket.com/user/uberkafer/media/dirt_zpsxfd4gfke.jpg.html)

 It's really not as rough as it looks. Pretty solid. I ended up with a few usable parts from the carcass, but most of it's going to be replaced with aftermarket stuff anyway.

(http://i190.photobucket.com/albums/z189/uberkafer/frame_zps1ylz2phh.jpg) (http://s190.photobucket.com/user/uberkafer/media/frame_zps1ylz2phh.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: thrillseeker on Oct 28, 2017, 10:20:59
Very nice find. I just finished rebuilding a 74 st90 that I got for a deal because the motor was stuck. Dratv.com was a great resource for anything I needed. He bored out the cylinders, and rebuilt the head for a decent price and I got it back on the road in no time. The biggest pain was the rusty gas tank. Nothing that some bb's, evaporust, and redcoat couldn't handle though.

I didn't go all out like you though. I just wanted to get it back in running order so I could play with it so I just replaced what was needed.


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Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Oct 28, 2017, 11:14:05
 Luckily, this one has a plastic tank.
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Dec 18, 2017, 19:52:10
This happened today. Won't be long until I can start putting the CT70/140 back together. After I get done with all of this Holiday overtime.

(http://i190.photobucket.com/albums/z189/uberkafer/25550193_10211050692409325_1938192091857575449_n_zpszpfwd2lf.jpg) (http://s190.photobucket.com/user/uberkafer/media/25550193_10211050692409325_1938192091857575449_n_zpszpfwd2lf.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/25507651_10211050694569379_7665917017726836572_n_zpsac4caucu.jpg) (http://s190.photobucket.com/user/uberkafer/media/25507651_10211050694569379_7665917017726836572_n_zpsac4caucu.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: Hurco550 on Dec 18, 2017, 21:04:50
Wow! That looks awesome

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Title: Re: '71 CT70 ....boneyard special
Post by: Ply318ci on Dec 19, 2017, 11:16:02
Around where I live there is a group of about 10 guys that bomb around all over town and the freeway (yes freeway as in 65mph plus speeds) on those and little Z50s. Been wanting one for years now. That one looks awesome.


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Title: Re: '71 CT70 ....boneyard special
Post by: 1fasgsxr on Dec 19, 2017, 12:53:35
That looks great !!!  Making me want to find one..
Title: Re: '71 CT70 ....boneyard special
Post by: WhyNot on Dec 19, 2017, 13:52:39
Looks great.

I do want to find one..........
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Dec 24, 2017, 09:38:02
 Getting there....

(http://i190.photobucket.com/albums/z189/uberkafer/25550335_10211086939995492_4027027566826984894_n_zpsxmdae28c.jpg) (http://s190.photobucket.com/user/uberkafer/media/25550335_10211086939995492_4027027566826984894_n_zpsxmdae28c.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/25552177_10211086939075469_8045529434389788979_n_zpskpci5vhj.jpg) (http://s190.photobucket.com/user/uberkafer/media/25552177_10211086939075469_8045529434389788979_n_zpskpci5vhj.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/26001230_10211090863413575_847352666002722344_n_zpsxegitz4x.jpg) (http://s190.photobucket.com/user/uberkafer/media/26001230_10211090863413575_847352666002722344_n_zpsxegitz4x.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: 1fasgsxr on Dec 24, 2017, 10:12:55
Sweet!
Title: Re: '71 CT70 ....boneyard special
Post by: tattoo on Dec 24, 2017, 10:45:29
Very!!!

Title: Re: '71 CT70 ....boneyard special
Post by: der_nanno on Dec 25, 2017, 12:29:35
With that purple paint-job, you should really go for some golden-glitte handle-bar grips or something like that and go all out 70ies disco-p*rn on it.  8)
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Dec 25, 2017, 14:14:06
 I looked at some purple flake grips but just couldn't bring myself to spend $40 on a set of grips when I already had these in the garage.
Title: Re: '71 CT70 ....boneyard special
Post by: der_nanno on Dec 25, 2017, 17:34:58
I know the feeling....  :-\
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Jan 11, 2018, 17:50:17
 Had to do a little clearancing on the frame and the engine, but we were able to get the motor in the frame today...

(http://i190.photobucket.com/albums/z189/uberkafer/26229953_10211220759460895_7057339630656757361_n_zpsho7fvigc.jpg) (http://s190.photobucket.com/user/uberkafer/media/26229953_10211220759460895_7057339630656757361_n_zpsho7fvigc.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/26904719_10211220759940907_2065561004970870782_n_zpsfveddo7f.jpg) (http://s190.photobucket.com/user/uberkafer/media/26904719_10211220759940907_2065561004970870782_n_zpsfveddo7f.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/26231381_10211220760900931_8227722553398879485_n_zpsggtgpvtk.jpg) (http://s190.photobucket.com/user/uberkafer/media/26231381_10211220760900931_8227722553398879485_n_zpsggtgpvtk.jpg.html)

 Little bit of interference with the brake pedal and foot pegs. Might try bending the pedal out and up just a bit. And I also need to figure out how to make the brake rod work with the +2 swing arm.
 We also fabbed up some brackets to mount the rear fender. If you use the stock holes with the +2 arm, the wheel could touch. Had to paint those and pick up some hardware. Hope to wrap that up next week.

(http://i190.photobucket.com/albums/z189/uberkafer/26220235_10211220761380943_6535450501357213131_n_zpshvn7dcla.jpg) (http://s190.photobucket.com/user/uberkafer/media/26220235_10211220761380943_6535450501357213131_n_zpshvn7dcla.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Jan 28, 2018, 13:40:23
I ordered a Mikuni VM26 carb and now my throttle and cable don't work.
 Also trying to get a luggage rack that fits with the kicked up rear fender and tail light. The Trail Buddy version looks like it will work with the fabrication of one small bracket.

(http://i190.photobucket.com/albums/z189/uberkafer/27336799_10211346667528518_591466461177881538_n_zpsedfladsf.jpg) (http://s190.photobucket.com/user/uberkafer/media/27336799_10211346667528518_591466461177881538_n_zpsedfladsf.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/27541142_10211346668568544_7657318638422691459_n_zpserpji2vp.jpg) (http://s190.photobucket.com/user/uberkafer/media/27541142_10211346668568544_7657318638422691459_n_zpserpji2vp.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: 1fasgsxr on Jan 29, 2018, 12:28:04
That thing is freaking awesome !!
Title: Re: '71 CT70 ....boneyard special
Post by: Jimbonaut on Jan 29, 2018, 15:52:30
Wait, what???  That is one hell of an amazing transformation from Page One to Page Two - this thing is sweet!  Kudos man
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Feb 17, 2018, 19:17:42
 Made big progress on the CT70 today. I want to dress up some wiring, purely for aesthetics, and I need a fitting for my breather filter/hose. But I heard it run today!
 I ordered some pilot jets and I need to tune it a bit. I think it's rich as it bogs badly under throttle. But I'm 99% there now!

 
(http://i190.photobucket.com/albums/z189/uberkafer/20180217_154204_zpsvua9kmyc.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180217_154204_zpsvua9kmyc.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180217_154313_zpsfig9nd1j.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180217_154313_zpsfig9nd1j.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180217_154300_zpsapzcvgli.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180217_154300_zpsapzcvgli.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180217_154155_zpsdxs4jyja.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180217_154155_zpsdxs4jyja.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180217_154305_zpsg4cocfxt.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180217_154305_zpsg4cocfxt.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: farmer92 on Feb 17, 2018, 19:52:28
Damn that looks fine! :o


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Title: Re: '71 CT70 ....boneyard special
Post by: Pete12 on Feb 18, 2018, 05:17:12
Awesome, what a great job, best looking Dax ever.
Title: Re: '71 CT70 ....boneyard special
Post by: advCo on Feb 18, 2018, 14:02:34
Nice work! Thatís a badass CT70


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Title: Re: '71 CT70 ....boneyard special
Post by: 1fasgsxr on Feb 19, 2018, 13:23:04
WOW !!!
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Feb 23, 2018, 17:59:30
 I think I have the carb/jetting figured out on the CT70. I uncapped the bleed/injection port and screwed IN on the mixture screw. It acted like it was rich, but the plug didn't agree with me.
 Talked to Vince at T-Bolt and he said what I was describing was common and is actually LEAN on the pilot circuit.
 Starts much easier now and revs throughout the range. I see wheelies in my future! (And hopefully no more scabs or scars).

(http://i190.photobucket.com/albums/z189/uberkafer/20180223_160142_zpsvwxvc6y4.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180223_160142_zpsvwxvc6y4.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180223_160134_zpswgybseta.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180223_160134_zpswgybseta.jpg.html)

https://youtu.be/XJRULcFaXkY
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Apr 04, 2018, 13:32:19
https://www.youtube.com/watch?v=RkOHEhTW97c&feature=youtu.be


https://youtu.be/RkOHEhTW97c
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Jun 28, 2018, 13:49:54
Adventuring further and further from home. This thing doesn't have an odometer or speedometer, and it's still a fresh-ish build, so I'm still a little skittish about getting farther away from home than I want to push it!
 Rode around the back roads near my house for twenty minutes or so. I swear, it needs a 5th gear. Or different sprocket ratios. It's pulling HARD and going plenty, plenty fast and still feels like it has more in it.
 I need to find a GPS speedo app for my phone and hook up my RAM mount.

(http://i190.photobucket.com/albums/z189/uberkafer/20180628_122155_zpsrvpuxhxa.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180628_122155_zpsrvpuxhxa.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180628_122207_zpsxhwqvx2v.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180628_122207_zpsxhwqvx2v.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180628_122211_zpswl8cmr0l.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180628_122211_zpswl8cmr0l.jpg.html)
(http://i190.photobucket.com/albums/z189/uberkafer/20180628_122201_zpseo1xdgs0.jpg) (http://s190.photobucket.com/user/uberkafer/media/20180628_122201_zpseo1xdgs0.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Sep 02, 2018, 21:33:22
 Back in June, I took the CT70/140 to Cyclemania in Charlotte. In addition to winning Best Vintage Modified, it was also shot for a story in Full Throttle magazine.

http://www.fullthrottlemagazine.com/September-2018-Event-Photos/ID/2241/Trail-140-%E2%80%93-Too-Cool-Little-Machine

(http://i190.photobucket.com/albums/z189/uberkafer/Screenshot_20180901-151509_zps8wshkgap.png) (http://s190.photobucket.com/user/uberkafer/media/Screenshot_20180901-151509_zps8wshkgap.png.html)
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on May 23, 2019, 19:55:05
 I swapped back to the VM22 that came with the engine and now the bike is MUCH easier to start and pulls just as hard as with the bigger carb.

 I also got an invitation to show it at The Congregation Show in Charlotte last month. That was pretty cool.

(https://i190.photobucket.com/albums/z189/uberkafer/congregation%20show_zps7rwpg0k6.jpg) (http://s190.photobucket.com/user/uberkafer/media/congregation%20show_zps7rwpg0k6.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: Jimbonaut on May 23, 2019, 20:17:23
I've been looking in the local classifieds almost every day for one of these since following your build.  They pop up from time to time, but rarely for less than 1200.  Seeing this little beauty again's just added more fuel to the fire.  What a doozy!
Title: Re: '71 CT70 ....boneyard special
Post by: scott s on Jun 02, 2019, 08:34:41
 Just because.

(https://i190.photobucket.com/albums/z189/uberkafer/20190601_133558_zpsntxgmpyn.jpg) (http://s190.photobucket.com/user/uberkafer/media/20190601_133558_zpsntxgmpyn.jpg.html)
(https://i190.photobucket.com/albums/z189/uberkafer/20190601_133648_zps9vjw3ohu.jpg) (http://s190.photobucket.com/user/uberkafer/media/20190601_133648_zps9vjw3ohu.jpg.html)
(https://i190.photobucket.com/albums/z189/uberkafer/20190601_133615_zpsodqtkkkw.jpg) (http://s190.photobucket.com/user/uberkafer/media/20190601_133615_zpsodqtkkkw.jpg.html)
Title: Re: '71 CT70 ....boneyard special
Post by: trek97 on Jun 02, 2019, 09:27:20
Neat  8)