Author Topic: 1975 CB750 K5 "Rhonda the Honda"  (Read 92325 times)

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Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #250 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 #251 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 #252 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 #253 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 #254 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 #255 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 #256 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 #257 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 #258 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 #259 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 #260 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 #261 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

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #262 on: February 07, 2017, 03:35:14 am »
Home sick from work... decided to get productive.

Made some aluminum brackets for this:


Also made this out of an old headlight ear. This will hold my Acewell speedo down and out of sight so I can still use it for referencing trip meter, etc, and for the occasional time I actually need to see a speedometer.


Both brackets and the speedo holder are getting fresh coats of paint that are currently drying.
--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 #263 on: February 07, 2017, 01:04:57 pm »
Closeups of the tach brackets. They are bent up 25°, just like the original double bracket.


--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 #264 on: February 07, 2017, 01:06:48 pm »
Looks good Evan
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 #265 on: February 11, 2017, 03:39:06 pm »
Balanced my rear wheel today. Had to pop off one bead and set the heavy part of the tire opposite the heavy part of the rim (valve stem) because it was going to take 2.75oz to balance! Crazy! After shifting the tire around, I only needed 2oz. If these fling off I'll have to go find some fishing lead to clamp on the spokes...



Just waiting on the 3.5mm rubber hose to come in for the carbs (Honda PN 95001-35003-60M), then install the new exhaust, then wait for the snow to melt!
--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 #266 on: February 11, 2017, 06:56:51 pm »
I like the style of those rims Evan.
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 #267 on: February 12, 2017, 03:16:58 am »
I like the style of those rims Evan.

The are from the CB750A model bike. 17" rear allows for a fatter tire, 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 Stev-o

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #268 on: February 12, 2017, 06:22:58 am »
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline grcamna2

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #269 on: February 12, 2017, 10:35:47 am »
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 Stev-o

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #270 on: February 12, 2017, 10:48:59 am »
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline evanphi

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Re: 1975 CB750 K5 "Rhonda the Honda"
« Reply #271 on: February 12, 2017, 03:28:33 pm »
I have this type wheel weight and like it much better...

http://www.ebay.com/itm/New-Barnett-Chrome-Wheel-Weight-3-4oz-NOS-/252766523686?hash=item3ada0f1126:g:eRsAAOSwtfhYn5Up&vxp=mtr

I had two 20g lead weights on there before. I might go back to that style if these come off.
--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 #272 on: February 17, 2017, 05:24:22 am »
Friday night means it is my night to get out of the house to work on my other woman!

To do:

Reinstall rear wheel, seat, and carbs.
Install new bracket for (hidden) speedo, and mount tach to center.
Install exhaust (minus muffler). Might mock up the mid-pipe that will be needed.

MAYBE start it up if it isn't too late. Just to hear it. Maybe.
--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 #273 on: February 17, 2017, 06:44:18 pm »
Got my tach mounted, carbs back on, rear wheel back on, and new exhaust installed. Just HAD to run it without the muffler. ;D






Bracket didn't work for the speedo. I need to make something like this:

Or better yet, this, but for a 35mm tube:


Didn't bother to install the seat just yet.
« Last Edit: February 17, 2017, 07:35:00 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 #274 on: February 17, 2017, 07:19:29 pm »
STEERING DAMPER MOUNT. THERE WE GO!

THAT is what I could use.

EDIT: Ordered one. ;D
« Last Edit: February 17, 2017, 07:32:56 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