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Author Topic: Where do i start?  (Read 1474 times)

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Offline domer

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Where do i start?
« on: October 06, 2010, 10:01:16 AM »
Sooooo.... now that i have my free 76 750 (see link below if really interested, nothing special though) i need to find out if it even runs before i go tearing #$%* apart. can i fire it up with out an exhaust system? not going to ride it or anything, just want to see how far i need to take this. basically i want to find out why this was sitting in the mission with a free sign on it. should i just order a gasket set and start yanking her apart? im just not to sure where to begin, she turns over, carbs are amazingly clean, but thats about as far as ive gotten...
so where do i begin?
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Offline kslrr

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Re: Where do i start?
« Reply #1 on: October 06, 2010, 10:08:29 AM »
Best not to run the engine with no pipes.  I would bower some pipes, change the oil and filter, rig up a temporary fuel container and start it up.
« Last Edit: October 06, 2010, 10:10:02 AM by kslrr »
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Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride

Offline domer

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Re: Where do i start?
« Reply #2 on: October 06, 2010, 10:12:00 AM »
ya kinda figured, but had to check. id hate to drop the cash i dont have on an exhaust set up, only to find out i gotta rebuild her (which according to my wallet will take a while!)
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Offline cobra2411

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Re: Where do i start?
« Reply #3 on: October 06, 2010, 04:32:45 PM »
While it's not good to run the bike with no pipes if it were me I'd still fire it up for a couple seconds. There's just something about hearing it run.
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Offline domer

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Re: Where do i start?
« Reply #4 on: October 06, 2010, 04:36:29 PM »
also something i was feeling, im going to try and do a compression check tonight... if i can find the time. but hearing it fire for a second or two would increase my motivation! then again, i dont want to harm it either...
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Offline Johnie

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Re: Where do i start?
« Reply #5 on: October 06, 2010, 05:03:46 PM »
If it sat for a long time a lot of guys will pull the tappet adjuster plugs on the top of the valve cover and run some oil in all the holes. It will help lubricate the upper end which is probably very dry from sitting. Best to do that before you start it rather than have it run while the oil takes time to get to that area.
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1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

Oshkosh, WI  USA

Offline dave500

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Re: Where do i start?
« Reply #6 on: October 06, 2010, 11:52:55 PM »
ive run them for several minutes with no pipes,your not going to ride it and load the engine are you?id be watching for oil pressure.
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Offline domer

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Re: Where do i start?
« Reply #7 on: October 07, 2010, 08:07:04 AM »
sweet this is the advice i need, compression check came up good, think im going to change the oil, add gas and a battery and see what happens. not going to ride it, not even gonna gas it... just want to make sure i dont hear any obvious nasty noises... then ill tear it apart ;D
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Offline joe29

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Re: Where do i start?
« Reply #8 on: October 07, 2010, 02:51:43 PM »
I'd suspect you would have a hard time hearing any nasty engine noises if you run it without any mufflers.  You're right though, hearing it run for the first time is a definite motivation.

BTW, congrats on this weekend.  I read your post on another forum.  ;)

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-joe

1976 CB750K
1974 CB750K
1972 CB750K

Offline domer

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Re: Where do i start?
« Reply #9 on: October 07, 2010, 03:17:03 PM »
ha, right on... cant wait to get this wallet draining wedding over with already!

your right i probably wouldnt hear much, but itll get me going!
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Offline dave500

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Re: Where do i start?
« Reply #10 on: October 07, 2010, 10:54:02 PM »
yeah use ear plugs or muffs,they sound like a high speed automatic shotgun firing.
« Last Edit: October 12, 2010, 12:40:54 AM by dave500 »
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Offline ferroussphinx

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Re: Where do i start?
« Reply #11 on: October 12, 2010, 12:36:51 AM »
query why is it not okay to run them with no pipes


i have straights running from mine is that a problem as well
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honda cb750 1974

Offline borzwazie

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Re: Where do i start?
« Reply #12 on: October 12, 2010, 02:01:24 AM »
good way to burn valves.
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Offline ferroussphinx

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Re: Where do i start?
« Reply #13 on: October 12, 2010, 12:48:02 PM »
hey borz   



my valves can be burnt with my straights is that what you mean or with out pipes at all
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honda cb750 1974
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