Author Topic: My CT70 V-Twin custom built  (Read 16505 times)

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Offline Doum

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My CT70 V-Twin custom built
« on: September 13, 2011, 07:31:20 pm »
I built this motor last winter,all parts are honda OEM,except for carb and air filter.The only one in the world V-twin 140cc CT70

CT70 DAX V-Twin 140cc Part 2 Final project!!





Offline mrrch

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Re: My CT70 V-Twin custom built
« Reply #1 on: September 13, 2011, 07:44:20 pm »
Nice, provide some details on how you made it work.
my build

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Offline Terry in Australia

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Re: My CT70 V-Twin custom built
« Reply #2 on: September 13, 2011, 07:49:09 pm »
I can't see the pics (Damn defence department firewall!) but Alan Millyard in Britain built a V Twin CT70 (or it could have been an SL70) back in the early 1980's when he was a school kid.

He's since built many Kawasaki based 4,5,6, and 7 cylinder two stroke road bikes, a V12 based on a Kawasaki in line 6, and a V12 Honda based on a CBX, from memory. Here's a link to his latest build, a Dodge V10 Viper engined bike, I want one, it's bigger than my Rocket III! Cheers, Terry.  ;D

http://thekneeslider.com/archives/2009/08/25/allen-millyard-builds-a-viper-v10-motorcycle/
« Last Edit: September 13, 2011, 07:53:01 pm by Terry in Australia »
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Offline Doum

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Re: My CT70 V-Twin custom built
« Reply #3 on: September 14, 2011, 04:34:42 am »
I can't see the pics (Damn defence department firewall!) but Alan Millyard in Britain built a V Twin CT70 (or it could have been an SL70) back in the early 1980's when he was a school kid.

His built was a SS100,that was originaly a Honda SS50

Offline ekpent

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Re: My CT70 V-Twin custom built
« Reply #4 on: September 14, 2011, 06:04:51 am »
I can't get enough of those mutant engines. Those things are really neat.Sadly I will never have the ability to make one but it sure would be fun to own one. Sure you get a lot of attention with that example.

Offline bill440cars

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Re: My CT70 V-Twin custom built
« Reply #5 on: September 14, 2011, 08:49:42 am »


  So Cool, I would ALSO like to see more of it and hear some details.  8)
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Offline strynboen

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Re: My CT70 V-Twin custom built
« Reply #6 on: September 14, 2011, 08:56:57 am »
do you have a pic of crank shaft...
i kan not speak english/but trying!!
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i hate all this v-w.... vords

Offline FrankenFrankenstuff

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Offline Terry in Australia

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Re: My CT70 V-Twin custom built
« Reply #8 on: September 15, 2011, 01:10:12 am »
Well I've just gotten home and am finally able to see the pics, good job mate, it looks great! I think it's fair to say that Alan Millyards V twin conversion pre-dates yours by 20 years or so and probably gave you some inspiration for your build, but you've done a great job and deserve to be proud of your efforts! Cheers, Terry. ;D 
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline grcamna2

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Re: My CT70 V-Twin custom built
« Reply #9 on: September 15, 2011, 02:56:10 am »
Doum,
   That is a Beautiful custom build ! Meant to look like a factory original;I imagine
win shows in the custom class regularly.Is it an 80 degree V-twin or 70 degree ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
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Do your BEST...nobody can take that away from you.

Offline FrankenFrankenstuff

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Re: My CT70 V-Twin custom built
« Reply #10 on: September 15, 2011, 07:03:00 am »
How much for you to build me a twin 90 for my Super 90? So it would be a SUPER super 90 (180).

Offline Doum

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Re: My CT70 V-Twin custom built
« Reply #11 on: September 15, 2011, 09:39:53 am »
How much for you to build me a twin 90 for my Super 90? So it would be a SUPER super 90 (180).

Honestly, I don't know.I have a lot more time on the frame than the motor.2 days of work and the motor was ready.For a complete bike done I think the price will be up to 4000$ easy

Offline Doum

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Re: My CT70 V-Twin custom built
« Reply #12 on: September 15, 2011, 09:44:09 am »
Well I've just gotten home and am finally able to see the pics, good job mate, it looks great! I think it's fair to say that Alan Millyards V twin conversion pre-dates yours by 20 years or so and probably gave you some inspiration for your build, but you've done a great job and deserve to be proud of your efforts! Cheers, Terry. ;D

Honestly,when I did this motor,I had no idea  about the existence of a similar motor done 20 year earlier.I had time,milling,lathe,boring machine,tig welder,and I decide to try something.Many laydown motor been done in the wolrd with 200cc honda motor to be fitted in the ATC 3 wheeler.So I said why not ''layup''....and finally I kept the horizontal cylinder

Offline Doum

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Re: My CT70 V-Twin custom built
« Reply #13 on: September 15, 2011, 09:49:49 am »
Doum,
   That is a Beautiful custom build ! Meant to look like a factory original;I imagine
win shows in the custom class regularly.Is it an 80 degree V-twin or 70 degree ?

I take it this  summer and go to some motorcycle show.Most of people don't believe me,but when I start it and said to touch the left exhaust....they have no other choice to believe in,and other people just don't look at the bike because they are not interrested by the ct70,but they never see the upper cylinder.I think this could be a nice piece in a museum.For the moment,the bike is in my ''museum'' with my 45 running bike and 60 parts bike.

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Re: My CT70 V-Twin custom built
« Reply #14 on: September 18, 2011, 09:47:50 am »
Seriously cool Dude.  Good job!

Offline lucky

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Re: My CT70 V-Twin custom built
« Reply #15 on: September 18, 2011, 10:06:54 pm »
Very cool project. Well done too.

Offline faux fiddy

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Re: My CT70 V-Twin custom built
« Reply #16 on: September 19, 2011, 01:54:43 am »
Doum,
   That is a Beautiful custom build ! Meant to look like a factory original;I imagine
win shows in the custom class regularly.Is it an 80 degree V-twin or 70 degree ?

I take it this  summer and go to some motorcycle show.Most of people don't believe me,but when I start it and said to touch the left exhaust....they have no other choice to believe in,and other people just don't look at the bike because they are not interrested by the ct70,but they never see the upper cylinder.I think this could be a nice piece in a museum.For the moment,the bike is in my ''museum'' with my 45 running bike and 60 parts bike.

Make a thousand kits and I bet they would sell.
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Offline demon78

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Re: My CT70 V-Twin custom built
« Reply #17 on: September 19, 2011, 04:04:47 am »
Nice build, now hang 3 more cylinders on it and sell the result to ultra light pilots as a radial engine for their ultra light you'd have to beat them off with a club.
Bill the demon.

Offline fmctm1sw

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Re: My CT70 V-Twin custom built
« Reply #18 on: September 20, 2011, 07:49:44 am »
WTF?!  That's neat!  What kinds of speeds are you achieving with that?
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Dude is that a tire ? or an O-ring..??

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Offline Doum

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Re: My CT70 V-Twin custom built
« Reply #19 on: September 22, 2011, 04:56:34 am »
WTF?!  That's neat!  What kinds of speeds are you achieving with that?

Not faster than factory,more power,better acceleration,but the motor turn to the same top RPM,with the same factory gearing,top speed is the same

Offline jas67

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Re: My CT70 V-Twin custom built
« Reply #20 on: January 21, 2013, 03:14:43 am »
VERY well done!   It looks like a little Ducati "L-twin"!
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Offline Syscrush

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Re: My CT70 V-Twin custom built
« Reply #21 on: January 22, 2013, 08:52:43 am »
I have a lot more time on the frame than the motor.2 days of work and the motor was ready.
Wow, how is that possible?

Are you using some kind of knife & fork connecting rod setup on a stock crank?
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Offline Doum

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Re: My CT70 V-Twin custom built
« Reply #22 on: January 22, 2013, 02:40:09 pm »
Thanks!
A modified stock crank with stock rods..... :)

Offline FHADIIJAZ

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Re: My CT70 V-Twin custom built
« Reply #23 on: August 26, 2016, 12:32:19 am »
HI I NEED THIS ENGINE HOW CAN I GET THIS ONLINE ORDER

Offline grcamna2

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Re: My CT70 V-Twin custom built
« Reply #24 on: August 26, 2016, 06:57:45 am »
Doum,
I see and appreciate the fine custom work you did to the frame so that the upper cylinder will fit exactly in place and look as it was coming from the factory that way! it looks like you can even adjust the valves on the upper cylinder w/ ease.
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.