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Author Topic: First build ever  (Read 20969 times)

Offline onefromexile

  • Posts: 267
Re: First build ever
« Reply #50 on: Sep 15, 2016, 15:22:39 »
Just came up on a cb175 in decent shape
Thinking about picking it up any thoughts??????


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Offline teazer

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Re: First build ever
« Reply #51 on: Sep 15, 2016, 20:49:08 »
Don't hurt your back.  Bend your knees.   :-)

Offline teazer

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Re: First build ever
« Reply #52 on: Sep 15, 2016, 20:49:42 »
Great little bikes if they are in good condition and cheap. 

Offline onefromexile

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Re: First build ever
« Reply #53 on: Sep 15, 2016, 21:40:34 »

Here is a few picks
I guess it needs new Pistons



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Offline onefromexile

  • Posts: 267
Re: First build ever
« Reply #54 on: Sep 16, 2016, 12:24:41 »
More pictures of the progression of the head port and polishexhaust side
below the mouth of valve on exhaust side


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Offline teazer

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Re: First build ever
« Reply #55 on: Sep 18, 2016, 00:55:29 »
Why are the cylinder liners out of the barrels?  That can't be a good sign. 

Small Hondas often have liners that come loose with very little heat, so they have to be refitted with a suitable grade of loctite and clamp them while they set.  If not they cannot be bored or honed and even if they could they will overheat in a running motor. 

Liners have to be an interference fit so that they transfer heat to the cylinder and fins. 

BTW, on those ports, just clean up the inlets and don't open them up and on the exhausts raise the roof and try to avoid dropping the floor.

Offline onefromexile

  • Posts: 267
Re: First build ever
« Reply #56 on: Sep 18, 2016, 01:26:53 »
That's from a cb175 I might buy
But the other pictures show my head work it's right on line with everyone's advice
And my research


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Offline onefromexile

  • Posts: 267
Re: First build ever
« Reply #57 on: Sep 18, 2016, 01:42:42 »
I left alone intake except rough clean up of casting marks exhaust however I opened up bowl below mouth of valve to port and ported the top half
So on its side a d shape


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Offline onefromexile

  • Posts: 267
Re: First build ever
« Reply #58 on: Sep 18, 2016, 02:11:58 »
I left the old crush washer in as a guide it helped get a good even shape


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Offline onefromexile

  • Posts: 267
Re: First build ever
« Reply #59 on: Sep 18, 2016, 02:14:05 »
The CB 175 had a stuck piston I guess guy got overwhelmed wanted to sell
I'd just buy a new hug and Pistons make sure crank is ok


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