Author Topic: CB750 K3F - AKA The Red (Read 118604 times)

MoMo · « **Reply #425 on:** February 19, 2017, 09:02:51 AM »

PITA but a worthwhile one

Have fun with it Prokop....Larry

JBCB500 · « **Reply #426 on:** May 06, 2017, 09:14:02 AM »

Quote from: 70CB750 on February 05, 2013, 02:53:30 AM

The new shock mount to accomodate the wider F swing arm. I used 3/4" 8 Grade bolt to make it, it still needs a washer beefore I weld it in.

70CB750: I've been directed to your excellent build thread as I am attempting a similar build I have a K6 frame and a lot of F2 donor parts. I plan to install F2 front and rear and F2 engine. It has been suggested here and elsewhere that I'll need to do something to correct the fact that the F2 arm is wider than a K6 arm - the shocks will splay outward if I don't. I've measured both arms and it seems the difference is only about 1/2" between K6 and F2.

I've attached a couple of pics of my mockup without any modification and I don't see that I'll have any problem. Is the K6 frame different from your K3? Am I going to be able to skip the step of moving the shock mounts?

Thanks,

JB

Stev-o · « **Reply #427 on:** October 26, 2017, 03:13:31 PM »

Quote from: 70CB750 on February 19, 2017, 05:13:08 AM

Replacing cam chain, ugh.

Not done yet?!

OR did you just buy another Jeep?

70CB750 · « **Reply #428 on:** May 04, 2018, 04:54:22 AM »

Sorry, JB, I took a break.

calj737 · « **Reply #429 on:** May 04, 2018, 04:55:53 AM »

Quote from: 70CB750 on May 04, 2018, 04:54:22 AM

Sorry, JB, I took a break.

Hope you've been well, 70CB. Your presence has been sorely missed.

70CB750 · « **Reply #430 on:** May 04, 2018, 04:56:23 AM »

Based on the reports that vintagecb750 had a set of bad tensioner wheels, I replaced mine with the metal set.

70CB750 · « **Reply #431 on:** May 04, 2018, 05:15:09 AM »

Quote from: calj737 on May 04, 2018, 04:55:53 AM

Quote from: 70CB750 on May 04, 2018, 04:54:22 AM
Sorry, JB, I took a break.
Hope you've been well, 70CB. Your presence has been sorely missed.

Thank you, Cal. Yes, everything is fine

MoMo · « **Reply #432 on:** May 06, 2018, 01:34:16 AM »

Beautiful guide wheels Prokop, good to see you back and doing well...Larry

70CB750 · « **Reply #433 on:** May 06, 2018, 02:30:28 AM »

Quote from: MoMo on May 06, 2018, 01:34:16 AM

Beautiful guide wheels Prokop, good to see you back and doing well...Larry

Thank you, Larry. Hope all is well with you.

754 · « **Reply #434 on:** May 06, 2018, 08:59:28 AM »

Are you dropping in on the machinist forum ? I JOINED UP OVER there..

70CB750 · « **Reply #435 on:** May 07, 2018, 05:56:50 AM »

Quote from: 754 on May 06, 2018, 08:59:28 AM

Are you dropping in on the machinist forum ? I JOINED UP OVER there..

I do sometimes to read. I ask question when something comes up, like the hold issue I had. Turns out the vice needed play adjusted.

70CB750 · « **Reply #436 on:** July 10, 2018, 03:58:33 AM »

Red got a new sprockets and chain. 17/48. Planed to get an o-ring but X - ring was all the local Honda had; X-ring it is.

The old chain was just a regular one I got to used up what life was left in sprockets that came with F2 parts. It stretched unevenly and you could feel it on acceleration, time to upgrade.

slikwilli420 · « **Reply #437 on:** July 10, 2018, 08:17:54 AM »

Quote from: 70CB750 on July 10, 2018, 03:58:33 AM

Red got a new sprockets and chain. 17/48. Planed to get an o-ring but X - ring was all the local Honda had; X-ring it is.

The old chain was just a regular one I got to used up what life was left in sprockets that came with F2 parts. It stretched unevenly and you could feel it on acceleration, time to upgrade.

Good call on new chain/sprockets. You would hate to break a chain. The X ring is far superior to the old O ring style anyway so good move. Once warmed up, the X ring has very similar drag to non-ringed chains, due to the lower contact area with the side plates, relative to traditional O ring chains.

70CB750 · « **Reply #438 on:** August 31, 2018, 02:35:48 PM »

Added navigation.

MoMo · « **Reply #439 on:** August 31, 2018, 08:13:30 PM »

Quote from: 70CB750 on August 31, 2018, 02:35:48 PM

Added navigation.

don't wanna get lost down there in Virginny?

70CB750 · « **Reply #440 on:** September 01, 2018, 04:18:06 AM »

Something like that

I never used GPS in my life, got this old unit and started playing with it. Comes handy with announcing whats coming and overall location situation. But I could never stand a machine telli9ng me where to turn and whatnot.

70CB750 · « **Reply #441 on:** September 26, 2018, 05:40:48 AM »

New JIS screwdriver set for the tool kit.

MoMo · « **Reply #442 on:** September 26, 2018, 10:21:58 PM »

Nice, I bought a set of Vessel Impacta

One of my better buys....Larry

70CB750 · « **Reply #443 on:** December 31, 2018, 04:19:22 AM »

The battery would show fully charged, but die cranking. Got a new one, made a difference.

70CB750 · « **Reply #444 on:** December 31, 2018, 06:54:29 AM »

I routed bowl air lines together. Eventually will add a nipple to the air box.

seanbarney41 · « **Reply #445 on:** December 31, 2018, 08:01:25 AM »

Quote from: 70CB750 on December 31, 2018, 06:54:29 AM

I routed bowl air lines together. Eventually will add a nipple to the air box.

please explain why

70CB750 · « **Reply #446 on:** December 31, 2018, 08:36:54 AM »

Quote from: seanbarney41 on December 31, 2018, 08:01:25 AM

Quote from: 70CB750 on December 31, 2018, 06:54:29 AM
I routed bowl air lines together. Eventually will add a nipple to the air box.
please explain why

It relates to Red lacking power above 80mph, I ain't that clever, but Mark listed it as one of the remedies:

4th and 5th paragraph:

http://forums.sohc4.net/index.php/topic,174783.msg2034226.html#msg2034226

seanbarney41 · « **Reply #447 on:** December 31, 2018, 10:03:46 AM »

ok, that is what I thought...but your picture shows the bowl overflow tubes, not the bowl vent tubes. I don't think you want your carbs over-flowing back into the airbox.

The bowl vent tubes exit above the bowls between carbs 1 and 2 and 3 and 4.

70CB750 · « **Reply #448 on:** December 31, 2018, 10:58:17 AM »

LoL. Feel like an idiot now.

seanbarney41 · « **Reply #449 on:** December 31, 2018, 01:01:23 PM »

Bah...just be sure and let us know if that particular mod has good results. I remember an old thread where it was discussed and created quite a controversy.

News:

Author Topic: CB750 K3F - AKA The Red (Read 118604 times)