Author Topic: 1975 CB750 K5 "Rhonda the Honda" (Read 94564 times)

evanphi · « **Reply #250 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.

evanphi · « **Reply #251 on:** February 07, 2017, 01:04:57 PM »

Closeups of the tach brackets. They are bent up 25°, just like the original double bracket.

grcamna2 · « **Reply #252 on:** February 07, 2017, 01:06:48 PM »

Looks good Evan

evanphi · « **Reply #253 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!

grcamna2 · « **Reply #254 on:** February 11, 2017, 06:56:51 PM »

I like the style of those rims Evan.

evanphi · « **Reply #255 on:** February 12, 2017, 03:16:58 AM »

Quote from: grcamna2 on February 11, 2017, 06:56:51 PM

I like the style of those rims Evan.

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

Stev-o · « **Reply #256 on:** February 12, 2017, 06:22:58 AM »

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

grcamna2 · « **Reply #257 on:** February 12, 2017, 10:35:47 AM »

Quote from: Stev-o on February 12, 2017, 06:22:58 AM

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

Will that weight stay-put once installed Stev-o ?

Stev-o · « **Reply #258 on:** February 12, 2017, 10:48:59 AM »

Quote from: grcamna2 on February 12, 2017, 10:35:47 AM

Quote from: Stev-o on February 12, 2017, 06:22:58 AM
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

Will that weight stay-put once installed Stev-o ?

Yes, it gets clamped on

evanphi · « **Reply #259 on:** February 12, 2017, 03:28:33 PM »

Quote from: Stev-o on February 12, 2017, 06:22:58 AM

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.

evanphi · « **Reply #260 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.

evanphi · « **Reply #261 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.

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.

evanphi · « **Reply #262 on:** February 17, 2017, 07:19:29 PM »

STEERING DAMPER MOUNT. THERE WE GO!

THAT is what I could use.

EDIT: Ordered one.

SOHC4 Cafe Racer Fan · « **Reply #263 on:** February 18, 2017, 08:27:54 AM »

"Yeah!!"

Hey, what's going on with your taillight flickering?

evanphi · « **Reply #264 on:** February 18, 2017, 08:42:25 AM »

Don't know. I had all the running lights off. The headlight/tach light wasn't flickering.

When the headlight switch is ON it doesn't flicker off.

RAFster122s · « **Reply #265 on:** February 19, 2017, 02:47:38 AM »

Typically that would be a bad ground path somewhere and the voltage from the circuit in question is finding path to ground through another circuit. Volvo 240s would do this if the grounds needed cleaning...get all kinds of strange behavior when the voltage would return through another component not turned on... Seat belt warning lamp would light or fan or some other strange behavior of another circuit.
Suggest you check your tail lamp's ground and the other grounds on the bike... motor ground as well to the frame. Headlight bucket, battery ground, etc. Never hurts to clean them up while it is off the road...doing it while on the side of the road is definitely no fun.

evanphi · « **Reply #266 on:** February 19, 2017, 04:33:51 PM »

Hm. I will have to check the tail light out. I suspect it is only the tail light because no other lights are flashing ON when the switch is set to off, as was the case that night. Usually the switch is ON so all running lights are on as well as the headlight, so I wouldn't notice it.

Stev-o · « **Reply #267 on:** February 21, 2017, 05:01:17 PM »

Was that a cold engine start? My K4 wont start if given throttle like that with full choke.

Bike sounds great!

evanphi · « **Reply #268 on:** February 21, 2017, 05:36:19 PM »

Quote from: Stev-o on February 21, 2017, 05:01:17 PM

Was that a cold engine start? My K4 wont start if given throttle like that with full choke.

Bike sounds great!

Yep very cold. It was -5C outside. I had been working in there for about 2 hours with a small heater and the halogen lights on, though, to warm up the oil a bit.

evanphi · « **Reply #269 on:** February 25, 2017, 07:21:57 PM »

OK so shop night was tonight.

First thing's first, put the LED lights into the tach. They don't seem a whole lot brighter. Oh well.
Next up, cut and routed the new 3.5mm drain hoses for the carbs. Hopefully they stay nice and rubbery for a long time. They all sit about 1.5" below the center stand axle.

That was all I needed to do tonight. But I also wanted to see why that tail light was flickering last week.

Took it off and disassembled it, then remounted. Nothing out of the ordinary.
Then I removed the rear brake switch and routed the wiring through the hole in the rear engine mount just ahead of the oil tank drain bolt. Seems like a smart place to run it. When I turned on the bike the rear brake switch was activated, so I had do dial it down. I think this may have been why it was blinking previously.

Started the bike up again to hear it roar. No more blinking brake light. Could have been the switch, ~~or could have been the mounting screws for the light, which is how it grounds, being dirty.~~ On second thought it was the switch. The lights were all turned off when I did that video. The switch was just too tight and was vibrating on.

Not wanting to waste any more time, I mounted the Delkevic muffler bracket/stand stopper to the right passenger peg bolt. Had to open up the hole slightly to fit the M12 bolt that holds the peg on. Will have to further elongate this hole so the bracket sits a bit lower. The center stand foot on the left side of the bike seems awfully close to the chain.

Last up to fabricate is an exhaust reducer pipe for the collector to the muffler. The reducer pipe needs to be 16GA stainless steel reducing from 2.5"ID to 2.25"OD. Looks like best option is going to a muffler shop for this. 2.25" OD stainless 16GA exhaust pipe, and then have the end expanded with a hydraulic expander to 2.5" ID.

The steering damper bracket/speedometer bracket should arrive Wednesday, and I also ordered the Magna 5OHM coil and wire set from 4into1. That should arrive soon too.

Seeing more and more bikes out on the road as our mega snowfall keeps melting...

evanphi · « **Reply #270 on:** February 27, 2017, 11:13:26 AM »

clamp arrived today. Put the speedo right where I wanted it.

Variantbuilder · « **Reply #271 on:** February 27, 2017, 09:35:28 PM »

for the 4into1 exhaust, did you use a certain size jet? and how did you tune it?

evanphi · « **Reply #272 on:** February 28, 2017, 04:55:46 AM »

Plug chops. I had my mixture screws almost completely closed last year just to get it to kick start, so I bumped up to 42s for this year, set to 1 turn out as of now.

evanphi · « **Reply #273 on:** March 05, 2017, 10:01:39 AM »

Installed the Magna coils.

evanphi · « **Reply #274 on:** March 09, 2017, 07:46:38 AM »

Ordered a length of exhaust tubing to make my reducer pipe! 90$ CAD for a 4 foot piece... I guess I'll have to make something else out of stainless now, too.

http://www.tdotperformance.ca/flowmaster-mb121448-straight-tube-2-25-in-o-d-48-in-length-stainless-steel.html

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Author Topic: 1975 CB750 K5 "Rhonda the Honda" (Read 94564 times)