Author Topic: K1 Hot Rod the Rat Race, new/old stuff.  (Read 37581 times)

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Offline grcamna2

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #400 on: May 03, 2025, 03:54:13 PM »
  I found a set of Tarozzi rear sets reasonable, the shifter side rear set controls are on, the brake side is for a disc brake Super Sport so I'm using parts from this kit and a set of universal rear controls to make it work with a drum brake, the spline adapter has a shorter lever than the Tarozzi lever, it should increase pedal effort a bit. If it doesn't work well, I'll have to ruin the chrome and weld to it.
  The seller didn't send the brake lever spline adapter for the disc master cyl. set. Neither of us knew it was special for the Tarozzi levers. It's on the way now.

Will you install a disc rear at some point Don ?
75' CB400F/'bunch o' parts'
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Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #401 on: May 03, 2025, 04:51:20 PM »
 I'd do it now, but I'm too attached to my drum brake 18x3" Lester mag. I have a drag bike frame that will likely go with a disc rear, it has a disc Henry Abe wheel. For now, I wanted to see if my old legs like the rear sets.
 The tote junkyard contains both 76f and 78F rear swingarms with the brake and frame parts.
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Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #402 on: May 05, 2025, 11:27:48 AM »
 The levers need to go down more but seem to work, with the short brake arm it takes a lot of pedal force. It shifts a little odd but it might take adjustment and me getting used to it.
 I'll work on the adapter plate more and paint it, this was just to see if I like it at all. The brake side was made for a 750 F1.
« Last Edit: May 05, 2025, 11:32:52 AM by Don R »
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Online seanbarney41

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #403 on: May 05, 2025, 12:19:07 PM »
Don, I usually clock the levers and linkage above the peg on the brake side.  Also for more leverage, get the lever 90 degrees to the pedal (or as close as you can) and make sure the actuator shaft lever is parallel to the pedal lever.  You can change the angle of the pedals by changing which hole the lock pin is in.  It's kinda tricky to get your head wrapped around how it works without playing around a bit.  Also, if I was setting those up for drag racing, might be time to make the switch to gp shift pattern 1 up 4 down...can easily be done with that shift linkage.

In general, old guys look at my bikes with rearsets and say "Isn't that uncomfortable?"  To me, it's more comfortable to be in good control.  Remember don't rest on the bars with your arms locked.  Keep elbows relaxed, support your weight with balls of feet on the pegs right under butt, squeeze the bike with your knees, and support your upper body with your abdomen muscles.  Up above 50mph the wind kinda takes over.
If it works good, it looks good...

Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #404 on: May 05, 2025, 02:46:44 PM »
 Since the brake linkage is 1/4" threaded rod right now I thought it should be pull rather than push. It still needs to be shortened, the correct Tarozzi lever is on the way but it is for a disc m/c. not sure if that will fit at all. I'm in test mode until it arrives.
 Thanks for your insight, I'm still learning. 
 Edit:
 The brand X frame side splined brake lever replacement is too short, I really need to stand on the pedal to get much rear braking. It's like my first drag car, the PO used the parachute every time even on a long track, it only had a 2-1 pedal ratio. I got a nice clutch pedal from a rambler and made a 6-1 brake pedal ratio it stopped really good after that.
« Last Edit: May 15, 2025, 09:33:53 AM by Don R »
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Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #405 on: May 25, 2025, 03:59:09 PM »
 I had an old cut-up brake pedal, so I cut it some more and made a steel lever to weld to it for the Tarozzi rear set. It extends the lever from the 2" one that's on it, to as much as 3.5". I'll work on adjusting the angles to the pedals too.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline grcamna2

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #406 on: May 25, 2025, 07:57:42 PM »
I had an old cut-up brake pedal, so I cut it some more and made a steel lever to weld to it for the Tarozzi rear set. It extends the lever from the 2" one that's on it, to as much as 3.5". I'll work on adjusting the angles to the pedals too.

The longer brake pedal will help.
I have also put a longer lever on the brake shoe plate on the rear wheel,makes a big difference.
75' CB400F/'bunch o' parts'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #407 on: May 26, 2025, 09:25:13 AM »

The longer brake pedal will help.
I have also put a longer lever on the brake shoe plate on the rear wheel, makes a big difference.
[/quote]
 I have a shorter brake plate lever, it's not going to help here but I always wondered what bike it came on. That said, I also have cb500 triple trees modified to fit a 750, so who knows? I think a PO of a buyout was a bit of a road racer.
« Last Edit: May 26, 2025, 09:27:04 AM by Don R »
No matter how many times you paint over a shadow, it's still there.
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Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #408 on: May 28, 2025, 09:23:24 PM »
 I was welding the footpeg and lifted the hood to find a towel 10 feet away hanging over the back of a chair and blazing fire on the back side. I carried it outside and used my 2-liter fire water bottle on it.
 I had a box of baking soda that I dumped into the "fire water" it never dissolved and plugged the hole in the cap. A quick shake cleared that. No damage to the nearby diecast or the chair.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline newday777

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #409 on: May 29, 2025, 01:31:12 AM »
Oh man that could have gone south kwik
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline BenelliSEI

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #410 on: May 29, 2025, 05:40:36 AM »
I have 5 fire extinguishers, spaced out through out my shop. I have a similar experience 10 years ago and am super cautious now!

Offline MauiK3

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #411 on: May 29, 2025, 07:22:24 AM »
Scary stuff!
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #412 on: May 29, 2025, 10:11:37 AM »
  We always had a 30-minute fire watch at work after any welding or grinding was done. With good reason.
  Moral of the story, fire doesn't care. I was surprised a spark went that far, it was probably from the previous grinding.
  I need to establish a bigger safe zone perimeter. 
« Last Edit: May 29, 2025, 10:15:09 AM by Don R »
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #413 on: May 29, 2025, 01:08:41 PM »
 I rode Rat Race to the gas station, I love it but it really needs new primary chains before it affects the crank gear. I'm thinking I'll just buy a 970 kit from cycle X and assemble the K6 case with the APE backcut trans and new clutch parts. Then this engine can get rebuilt for the turbocharger.

 I edited out the part where I said stupid chit about the worn primary. Brain Fart.

  I keep finding the left peg up when I get on, I either need to learn to watch it or find a way to put a return spring on the Tarozzi folding peg. The shift lever can come up just a touch.
« Last Edit: May 31, 2025, 04:57:43 PM by Don R »
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Online seanbarney41

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #414 on: May 29, 2025, 06:30:19 PM »
You will evenually learn to expect that....all my bikes with folding peg Tarozzi's do that too
If it works good, it looks good...

Offline Don R

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Re: K1 Hot Rod the Rat Race, new/old stuff.
« Reply #415 on: July 26, 2025, 05:04:20 PM »
 Today, I ran across the plate from the PO of the rat Race, it was 1987 when it ran before I got it. Holy wow, so it sat in garages and barns for 35 years before I got it going again. It still needs new engine chains so this winter it can come back apart.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.