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restoring bike that has never ran in 20 years..segestions???

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zxcvbnm
Renault 5 Driver



Joined: 27 May 2008
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PostPosted: 03:56 - 27 Jul 2009    Post subject: restoring bike that has never ran in 20 years..segestions??? Reply with quote

im restoring a 1973 honda cb175 that has never ran in 20 years and is seized. do u think i have any hope of restoration? and how would i un seiz it?
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ZRX61
Victor Meldrew



Joined: 05 Nov 2003
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PostPosted: 05:03 - 27 Jul 2009    Post subject: Reply with quote

Take the drain plug out, drain the water/oil mix.

Reinstall plug, remove spark plugs, fill cylinders with 50/50 mix of ATF & acetone. Replace plugs. Walk away for a week.
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Gawain
Nitrous Nuisance



Joined: 06 Dec 2008
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PostPosted: 05:48 - 27 Jul 2009    Post subject: Reply with quote

You'll certainly have to clean the carbs if fuel was left in, ditto for fuel tank. New tires, hoses. Ultimately it also depends on how much damage occured from the sieze and neglect before that.
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 10:08 - 27 Jul 2009    Post subject: Reply with quote

I'd probably miss out the acetone to be honest. It's really good at destroying rubber seals if it gets into the sump.

But yes, whip the head off it and see how much damage is done in there. If the barrels are seized on, soaking in some form of light oil for an extended period would be an idea. I've also known people to pour hot engine oil down the affected cylinder.

You're looking at a minimum of a rebore and the next size up piston kit. Handily www.davidsilverspares.co.uk has LOADS of spares in stock for them and they are well cheap. They have genuine honda +0.25, +0.5 and +1.0 piston kits. Both sides for £18. That's mind bogglingly cheap!

If the head, cam, crank and casings are good, there is no more than 1mm deep scoring on the barrels and the frame isn't rotted to buggery, sounds like you've got yourself an ideal project Thumbs Up. They were well regarded bikes as I recall and very collectable.
____________________
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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STONEY!
Brolly Dolly



Joined: 14 Sep 2005
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PostPosted: 20:52 - 27 Jul 2009    Post subject: Reply with quote

baaa you lot are all misery, bung a bit of wd40 down the plug holes and give it a good o'l kick it may free off ok, if not try putting it into top gear and knocking the backwheel forwards and back. Ive freed off a fair few bikes that have siezed from standing like this and as long as they have a spark squirt a bit of easy start in the airbox or carbs if you can, kick it over and she might fire up (all mine have) worst one was a cz125 sport that had been standing outside since 1973/4 full of water lol still got it going without taking it apart!
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zxcvbnm
Renault 5 Driver



Joined: 27 May 2008
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PostPosted: 22:40 - 27 Jul 2009    Post subject: restoring 1973 honda cb175 Reply with quote

yea mines been sitting out side too and snowed on. i also have one more problem: the wheels are seized and the chain is soooooo tight and rusty...... any idea's how to break those loose?
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 23:00 - 27 Jul 2009    Post subject: Re: restoring 1973 honda cb175 Reply with quote

zxcvbnm wrote:
yea mines been sitting out side too and snowed on. i also have one more problem: the wheels are seized and the chain is soooooo tight and rusty...... any idea's how to break those loose?


Take the wheels off. You'll need to strip the brakes anyway.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Howling Terror
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Joined: 05 Dec 2008
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PostPosted: 23:07 - 27 Jul 2009    Post subject: Reply with quote

You might strike lucky like me and after changing the fluids it fires 2nd kick and not a whiff of blue smoke. Then again i'm impatient Rolling Eyes
Stood for 10-15yrs
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Last edited by Howling Terror on 23:30 - 27 Jul 2009; edited 1 time in total
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zxcvbnm
Renault 5 Driver



Joined: 27 May 2008
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PostPosted: 23:12 - 27 Jul 2009    Post subject: restoring 1973 honda cb175 Reply with quote

and do u think any of the wires would be rusted and not grounding properly?
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 23:15 - 27 Jul 2009    Post subject: Re: restoring 1973 honda cb175 Reply with quote

zxcvbnm wrote:
and do u think any of the wires would be rusted and not grounding properly?


Almost certainly. The points are probably all corroded too if it's sat outside for 20 years.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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zxcvbnm
Renault 5 Driver



Joined: 27 May 2008
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PostPosted: 23:17 - 27 Jul 2009    Post subject: restoring 1973 honda cb175 Reply with quote

ughh.. gona probly be a big job then
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