Author Topic: 1975 CB750 K5 "Rhonda the Honda"  (Read 94555 times)

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Offline RAFster122s

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #225 on: July 06, 2016, 12:01:25 AM »
You fixed the vac leak and it became rich?  Glad it is kicking over well now and all is well...so get out there and ride and share some more videos...

David
David- back in the desert SW!

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #226 on: July 06, 2016, 04:42:52 AM »
You fixed the vac leak and it became rich?  Glad it is kicking over well now and all is well...so get out there and ride and share some more videos...

David

Fixed vac leak and it became more lean!
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #227 on: August 02, 2016, 05:03:14 PM »
Got my new stainless Delkevic headers in the mail today. Collector OD is 2.5", ID is 2.25". My current muffler is 2.25" OD. Womp.

So what I have is a slip-IN rather than a slip-ON.

Would this still be ok if I clamp it? Is there a exhaust-capable liquid gasket maker to avoid leaks (yes, Permatex Ultra Copper)?

Should it be welded? Or should I have a reducer made up so that it is still a slip-ON, technically (least fav option)?
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #228 on: August 23, 2016, 05:40:43 PM »
FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUCK

So much for my exciting two day moto trip. :( Was doing a valve adjustment because I noticed #1 IN was being increasingly noisy lately... It was the only one out of spec. Here's why:



Good thing I did the adjustment or I would have ended up stranded sooner or later!


So HOPEFULLY I can get one tomorrow morning from the dealership. Are there any other manufacturers (kawi, yami, etc) that have the same size adjuster that I could check their dealerships, too?
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #229 on: August 23, 2016, 06:36:05 PM »
Immmm, I don't think its supposed to be like that from the factory ???

That about blows! I am happy for you that you caught that before riding off and chewing up your head  :P

So am I... I noticed on my ride Sunday that it was noisier than usual. Hence why I checked it tonight before heading out on a 1100KM round trip...
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #230 on: August 26, 2016, 11:18:48 AM »
Well I ran into another UNexpected issue about 200KM into my trip on Wednesday. I noticed that my #1 plug cap was hopping at idle. I figured my plug was loose. Boy was I right! THREADS WERE STRIPPED. How this happened I don't know. I am always careful when installing plugs. Guess not... So it got fixed with an M12 tap to revive some threads, as well as some LocTite Bearing Mount. It held up fine for the rest of the trip! But this does mean the head is coming off this winter to do a helicoil. :(
« Last Edit: August 26, 2016, 11:21:29 AM by evanphi »
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #232 on: October 12, 2016, 07:13:48 AM »
Hand guards installed:


--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline grcamna2

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #233 on: November 04, 2016, 05:23:52 AM »
The bike looks good Evan,how was the trip ?
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.

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #234 on: November 04, 2016, 06:54:19 AM »
The bike looks good Evan,how was the trip ?

to Halifax? It was great once I got that sparkplug back in. Going to be repairing those threads this winter. Avoiding removing the head.

Here's Rhonda's latest adventure, including some light offroading.

--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #235 on: November 04, 2016, 07:16:22 AM »
Is it possible to service the lock/tumblers on our keyswitches? My key is getting difficult to insert. Once it is in there it is fine to turn.

Or should I just order a new switch set?
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline nvr2old

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #236 on: November 04, 2016, 09:14:57 AM »
Kudos for using a Tragically Hip tune to kick off your video.  Love that band.
'76 CB550F-'72 XL250-'82 MB5-'82 CX500 Turbo-'77 naked Goldwing-'75 CB400F cafe'-'79 Suzuki GS1000S..hey, it's a Wes Cooley..

Offline RAFster122s

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #237 on: November 04, 2016, 11:02:09 AM »
If you have a locksmith do it you will have more hair after the experience.  It can be quite intimidating with all those tiny pieces.
Normally a locksmith is able to handle many needed repairs.  It is not too costly, provided it is a quality lock that is original Honda, instead of a cheap Emgo pos.
David- back in the desert SW!

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #238 on: January 03, 2017, 08:21:39 AM »
Got some winter work started on Friday...

Drained the gas, sloshed some MMO around
Removed the seat, getting it ready for re-covering!
Removed the rear wheel to prep for new tire (BT45 to match the front) and truing. Found another broken spoke in the process. Different one from last time. Probably just everything too loose on the wheel.


Only had one stuck nipple. Let it soak with Rust Check for awhile. Freed right up!


In the process of removing the wheel I bent my brake rod (OOPS). Going to heat it and straighten it out.


Left to do: Remove exhaust and get new Delkevic stuff all ready to install
Remove carbs and put in 42 slows.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #239 on: January 04, 2017, 04:39:03 AM »


Well that was easy. Cold bend in the aluminum jaws. Ran a nut down after to clean up the threads.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #240 on: January 12, 2017, 04:55:17 AM »
Started taking more things off Rhonda...

MAC exhaust is off. Going on soon is the Delkevic. Still need to make a reducer pipe for the cone engineering bit.
Carbs came off and 42 slows went in.
Old oil drained, new oil added.
Started slowly picking away at the rear wheel truing. Started by tightening everything so they ring. Closer to true already! Many were very loose.

I think my oil pressure switch is leaking. How do I get the hard old rubber cap off it? Heat gun?


Started taking apart my seat some more. Sprayed a coat of gloss black last night, then another this morning. Very rusty from some PO tipovers and leaky battery! Will spray underside tomorrow.
« Last Edit: January 12, 2017, 04:57:38 AM by evanphi »
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline grcamna2

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #241 on: January 12, 2017, 07:18:01 AM »
Evan,
You might consider sandblasting that seat pan first before coating it as that will give maximum adhesion to your paint.
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.

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #242 on: January 12, 2017, 07:42:44 AM »
Evan,
You might consider sandblasting that seat pan first before coating it as that will give maximum adhesion to your paint.

I'm using Rust Check Rust Paint on it. It should stick pretty well. I used the same stuff on my triples last winter and have had no issues since. I was quite diligent with removing the old stuff. It is a decent match to the paint already, which is nice.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #243 on: January 16, 2017, 04:56:25 AM »


New seat cover! Combo of binder clips and wife's clothespins to hold the edge down for cementing. Tonight will test-fit the old chrome trim. If it works well I'll cement it down.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #244 on: January 26, 2017, 10:35:29 AM »
Finished my seat re-cover!





It is slightly off-center at the front, I know... It was straight when I started clamping. Oh well! Still pretty good, I'd say. I'm still really happy with it! I used the original chrome trim, I just used a razor-blade to remove it from the cover. The lumpyness on the rear end is from the plastic sheet I put under it, since the pattern is stitched, not pressed.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline Stev-o

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #245 on: January 26, 2017, 01:24:25 PM »
+1 well done!   A nice seat is a must in my book...
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline rumpleblumpkinz

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #246 on: January 28, 2017, 03:38:37 AM »
Dig that color man!!

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #247 on: January 28, 2017, 05:39:52 AM »
Amazing what a little shot of kerosene on a brush can do for degreasing... This was all black before last night.



Rhonda's current state:


Left to do:
New overflow hoses for carbs (windshield washer hose!)
Put the carbs back on
Repair #1 spark plug threads (maybe splice in some new plug wires, too)
Finish truing the rear wheel and mount new BT45
Mount the Exhaust and have a small reducer pipe made for the cone engineering muffler that I already have

Mount tach to center and mount my electronic speedo off to one side, hopefully hidden. This is going to be the hardest part.
« Last Edit: January 28, 2017, 05:55:48 AM by evanphi »
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #248 on: February 03, 2017, 04:43:09 PM »
I'm sick with a mancold so I decided it best not to go out to a cold garage tonight. So I stayed in and played with Rhonda's nipples! ;D



Here's how you can check wheel true without a dial gauge.

Zip-tie a short piece of rod (aluminum gun cleaning rod works really well) to either your balancing stand, fork leg, or swingarm.

Get it close to the spokes to measure radial (up/down or "hop") runout


And close to the sides for lateral (side-to-side or "wobble").

True your wheel as you normally would. There are plenty of guides out there. Check here: http://forums.sohc4.net/index.php/topic,368.0.html

Now set your rod so it just barely touches (you should hear it when you rotate the wheel) on the closest point and then rotate your wheel to where it looks like it is the furthest from the rod (it should still be pretty close).

Honda spec for a true wheel is 0.5mm or better.


How can you measure this without a dial gauge? You could use a set of feeler gauges to measure this distance. But if you don't have those handy, you should certainly have some zip ties since you just used some to attach your measurement rod! Measure the tip of one, and see if it can slide into the gap.



When I slid this one (0.75mm) into the gap I had, there was noticeable movement of the rod


This would tell me that the gap is much less than the 0.25mm difference it would take to get me better than 0.5mm runout overall.

If you used smaller zipties, your measuring tool will be even smaller and you can get an even more precise result.


I prefer this method when truing wheels because I find staring at a dial gauge just makes me go crazy! The irregularities of a tire will make up all the difference anyway.
« Last Edit: February 03, 2017, 04:53:18 PM by evanphi »
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #249 on: February 05, 2017, 04:02:00 PM »
I'm unsure if my bead has seated fully on my new BT45. I don't think it has, but it could just be my small pancake compressor isn't jamming enough pressure in there fast enough. It worked fine for my previous rear Spitfire S11 and a front BT45.



That is the indicator line all the way around, same on both sides. This is the 17" aluminum rim from a 750A.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive