Author Topic: Purchase inquiry  (Read 1281 times)

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Offline CDeitz

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Purchase inquiry
« on: April 16, 2017, 11:43:09 AM »
Greetings,

New to the forum here,, was trying to find a post about buying used motors etc.

I found a local guy selling 2 CB750 SOHC engines, Frame etc.  my question is what should i look for when i go look at the engines? they look pretty dirty...

Cheers!

Offline jamesw

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Re: Purchase inquiry
« Reply #1 on: April 16, 2017, 05:35:43 PM »
Be sure to take off the front sprocket cover, secured by 2 or 3 JIS screws (not philips) to inspect the case for cracks.
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Offline seanbarney41

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Re: Purchase inquiry
« Reply #2 on: April 16, 2017, 06:10:26 PM »
James is right on with big numero uno.  Other than that, if intake and exhaust and spark plug ports are not plugged with something, I'd be very wary.

Make sure they turn free, shift into all gears, and have some feeling of compression.  Bring a reference of serial numbers so you can tell what year they are.   Unless they are sandcast or k0, I would not pay more than a couple hundred an engine.  They are absolutely not rare.
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Offline 754

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Re: Purchase inquiry
« Reply #3 on: April 16, 2017, 11:09:12 PM »
Keep an eye out for broken or welded motor mount, over the sprocket cover, cracked behind point cover, damaged dyno cover..often welded.
 Any motors with serial number starting with 1, worth grabbing.
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Offline CDeitz

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Re: Purchase inquiry
« Reply #4 on: April 17, 2017, 05:54:22 AM »
Thanks for the info guys!,

here are some photos of the engines. there is a tank in one of them...  ( i have not seen them in person yet )

I see that the spark plugs are still in, but the intake is not plugged.. can not see the serial..
« Last Edit: April 17, 2017, 05:57:02 AM by CDeitz »

Offline Stev-o

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Re: Purchase inquiry
« Reply #5 on: April 17, 2017, 06:47:12 AM »
Here is vin info, earlier the motor the better.

http://www.sohc4.net/cb750k-serial-numbers/

Where in MI are you?
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline CDeitz

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Re: Purchase inquiry
« Reply #6 on: April 17, 2017, 05:21:14 PM »
Well, I stopped and looked at the lot today. One engine is stuck and one is free... said they came off a barn bike, smelled like turpentine? Seemed to shift through all gears couldn't really tell...

VIN CB750E 2026xxxx on the one that is free, plenty of parts,,,

Still nervous about it..

500 for everything, what do you guys think?

Stev-O - from Lansing area

Offline scottly

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Re: Purchase inquiry
« Reply #7 on: April 17, 2017, 06:52:32 PM »
What is the number on the other motor? $500 seems a bit high, based on what pics have been posted...
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Offline CDeitz

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Re: Purchase inquiry
« Reply #8 on: April 17, 2017, 07:28:13 PM »
I didn't get that one because it was seized,  :( but its both motors, a frame, 4 carbs forks etc. for 500, is that still too high?

Offline scottly

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Re: Purchase inquiry
« Reply #9 on: April 17, 2017, 07:37:57 PM »
$500 is a lot for a pile of nasty looking parts. Is there a title? Wheels? Gauges? Unless the stuck motor is a sandcast, it's too high, IMHO.
Don't fix it if it ain't broke!
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Offline CDeitz

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Re: Purchase inquiry
« Reply #10 on: April 18, 2017, 05:43:20 AM »
There is a gauge cluster, (speedo, tach) there is a title, wheels but they are de-spokes and no rubber,

I'm feeling I should just pass and be patient for a better find,, :(

Offline Stev-o

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Re: Purchase inquiry
« Reply #11 on: April 18, 2017, 05:54:01 AM »
If your trying to build a bike, hold off for a better deal. 



'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline flybox1

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Re: Purchase inquiry
« Reply #12 on: April 18, 2017, 09:09:12 AM »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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Offline CDeitz

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Re: Purchase inquiry
« Reply #13 on: April 18, 2017, 09:18:27 AM »
Yeah I seen that! What do you guys think?  8)

Offline flybox1

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Re: Purchase inquiry
« Reply #14 on: April 18, 2017, 09:23:13 AM »
I say get over there with a truck and 1500 cash....and have a blast riding all summer long  8)

It'll need a full tuneup, but otherwise it looks nice.
« Last Edit: April 18, 2017, 09:24:56 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline Stev-o

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Re: Purchase inquiry
« Reply #15 on: April 18, 2017, 03:19:32 PM »
I say get over there with a truck and 1500 cash....and have a blast riding all summer long  8)

It'll need a full tuneup, but otherwise it looks nice.

+1.   And take off that silly sissy bar and you have a nice looking bike.

FYI - that does not look to be original paint/color, but looks like a nice repaint.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........