Author Topic: CB750 K1. Dont drink and ebay project.... (Read 44354 times)

jaguar · « **Reply #75 on:** April 19, 2011, 11:25:32 AM »

http://www.aircooledtech.com/tools-on-the-cheap/soda_blaster/
cosco has 13.5lb bags of soda for like $4

jaguar · « **Reply #76 on:** April 26, 2011, 01:24:53 PM »

well the surprise is in!

19 front and 18 rear Lester mag wheels!
scored them cheap. i think they will need a little cleaning but should work great.
very pumped. i have 2 CB750s now and both are on lesters. my other is an F
was getting worried that i wasnt going to get them when i saw some of the prices on ebay.....$700 for just a rear 18 a few weeks ago....thats kinda crazy

going to try and get he frame cleaned up and ready for coating this weekend and get the bike back to a roller asap

what would you recommend for rear shocks?
CB1100F?
hagon?
progressive?
i have a set of progressive shocks on my F in stock length. was thinking about getting longer ones for that bike and using the standard length on this bike

jaguar · « **Reply #77 on:** April 27, 2011, 05:03:21 AM »

Here they are
someone tried to glue the drive to the hub at some point.....not sure why
i think they need some avons now....

on the hunt for a caliper and braket.

jaguar · « **Reply #78 on:** April 30, 2011, 10:03:52 AM »

cleaning them up

what should i do about the brake surface of the drum?

70CB750 · « **Reply #79 on:** April 30, 2011, 10:21:49 AM »

Is the drum within tolerances? You could chuck it in the lathe and resurface it if it's too rough, other than that I would not bother.

jaguar · « **Reply #80 on:** May 01, 2011, 11:22:43 AM »

Quote from: 70CB750 on April 30, 2011, 10:21:49 AM

Is the drum within tolerances? You could chuck it in the lathe and resurface it if it's too rough, other than that I would not bother.

i have to measure it to know for sure but i think that it will be with in spec

jaguar · « **Reply #81 on:** May 01, 2011, 11:23:16 AM »

ive never done a dual disc conversation so i have a few questions.

the discs that are on the wheel have different offsets and i assume that is needed due to the wheel and speedo.
but then again i thought that people used two standard front disks...but is that only when dealing with a spoked front wheel.

i was able to buy another early caliper and bracket to use.

anyone have some good pics of what needs to be done to mount it to the leg?

Rookster · « **Reply #82 on:** May 01, 2011, 12:49:47 PM »

Quote

the discs that are on the wheel have different offsets

This is just a guess but I would say someone thinned the mounting flange on the second disk which is giving you a different offset. Why would someone thin it you ask?

As you already know the Lester fronts don't have the flats on the hub for the speedo drive plate modification that is normally done with dual disks. So someone probably got creative and decided to take some meat off the mounting flange on the second disk and use the stock speedo drive retainer. The proper way to do it is to have the back of the second disk machined so the speedo drive plate can sit inside it. This way the disk acts as the retainer for the speedo drive. Have you tried to mount the wheel with the dual disk setup? I would guess it spreads the forks apart at the bottom slightly becuase the speedo drive is sitting on top of the disk instead of "inside" it.

Quote

anyone have some good pics of what needs to be done to mount it to the leg?

With the early caliper bracket you have to use 1/2" spacers on the top 2 mounts and you have to remove some meat from the lower mount to get it to sit properly.

Scott

jaguar · « **Reply #83 on:** May 01, 2011, 05:25:18 PM »

pics not showing up....

ill post some better pics of the discs.
i think that they are different and not modded.

jaguar · « **Reply #84 on:** May 04, 2011, 03:58:19 PM »

why are the disc plates different?

painted

speedo drive set up that needs to be cleaned up

got most of the gunk off

it seems that the disks dont have different offsets.....i was just looking at them wrong..
its funny as it looks like one side of the has a different offset then the other.....
it is what it is right now. ill rebuild the forks and get the front end back together this weekend and see whats what

jaguar · « **Reply #85 on:** May 09, 2011, 01:24:13 PM »

rookster so you only removed the material from the fork? from just looking at it is seems that it would be the best way to do it but wanted to make sure.
and then the top is just a matter of using 1/2" spacers? sounds easy....

was having alittle fun with a small side project....

thought it would be fun to have a BMX bike on lesters to go along with my 2 cb750s....

jaguar · « **Reply #86 on:** May 12, 2011, 11:00:37 AM »

SOooo the speedo drive housing that came on the wheels is cracked....
and the one that came off the K1 is "thicker" then the other one...
not 100% sure what to do about this....

Rookster · « **Reply #87 on:** May 13, 2011, 05:46:42 AM »

"rookster so you only removed the material from the fork?"

I filed the bracket rather than the fork. Either will work. I found some nice chrome 1/2" spacers at a hardware store.

Scott

jaguar · « **Reply #88 on:** May 13, 2011, 07:26:38 AM »

Thanks very much

I'm going to try and get the front end somewhat sorted this weekend
We shall see how that goes

jaguar · « **Reply #89 on:** May 19, 2011, 02:49:32 PM »

what gives?
the rotors have the same offset but the wheel seems to have different offsets on both sides.
is this ok and its just part of the dual disk set up?
any help would be great

jaguar · « **Reply #90 on:** May 28, 2011, 02:51:29 PM »

Getting the carbs cleaned up and put back together.
still need to soda blast the mounting bracket.

still doing some polishing

jaguar · « **Reply #91 on:** June 08, 2011, 11:41:04 AM »

I have a set of new Progressive front springs that im thinking about using for the bike.
Decided to run straight rate and emulators on my other 750 so now i have the progressive springs left over.
not sure if i want to run them in the bike or not yet.

im in the middle of moving now so i hope in 2-3 weeks the bike is rolling and ill be really motivated to rebuild the motor

greenjeans · « **Reply #92 on:** June 08, 2011, 01:00:18 PM »

Jaguar, that polishing looks fantastic. Tedious, but always worth it. Gonna be one sweeeeet bike.

jaguar · « **Reply #93 on:** June 14, 2011, 09:30:00 PM »

Quote from: greenjeans on June 08, 2011, 01:00:18 PM

Jaguar, that polishing looks fantastic. Tedious, but always worth it. Gonna be one sweeeeet bike.

Thanks.
It takes up a ton of time but im short on cash to buy some stuff but sand paper is cheap....lol

jaguar · « **Reply #94 on:** June 14, 2011, 09:30:20 PM »

Some Ti goodness for the rocker arms

Terry in Australia · « **Reply #95 on:** June 24, 2011, 07:33:31 PM »

G'Day Jag, that disc with the square mounting flange is a K0 item mate, it's a pity in a way that it's been drilled, K0 discs are getting harder to find. I'll have to check, but I thought K0 discs were different offset to later discs, certainly the K0 hub had less "meat" on the disc flange side than the later hubs.

Anyway, your project is looking good mate, and well done on that polishing, I thought you'd had those parts chromed! Cheers, Terry.

jaguar · « **Reply #96 on:** June 25, 2011, 05:38:41 AM »

Thanks for the kind words Terry

Honestly im still learning alot about this early CB750 stuff, Its been great.

As for the offsets they seem to be the same, I have have a pic of the two rotors sitting flat next to each other.
I think i have another pair of K rotors that are not drilled, I assume that they are 72-76, I might run them as they are undrilled and should be identical.

The spacing of the rotors is still bugging me but i think its something im going to have to live with.
Plan is the get this thing to a roller this week and start cracking away on the engine.

Terry in Australia · « **Reply #97 on:** June 25, 2011, 06:36:13 PM »

No worries mate, you're doing a good job on that bike, and I'm looking forwards to seeing the end result. The discs don't sit equidistant from the fork legs on my K1 with dual discs and Henry Abe wheels, the disc on the left (alternator side) sits quite close to the fork leg (say, 5mm(?)) whereas the extra disc on the right side (points cover side) sits about 10mm from the leg, which was about the same when I had the dual disc setup with OEM spoked wheels.

What I'm wondering with yours, is, were the Lester hubs modelled on the K0 hubs, or the later ones? You see, the K0 hubs were wider than K1-K6 hubs, so I'm wondering if that is what's causing your problems? I remember another member here had a similar problem during his build because he initially used a K0 front hub on his dual disc setup, (I know because I eventually bought his hub for my K0 build) and the fix was swapping out that hub for a later (narrower) hub. I'm wondering if you might need to have some "meat" trimmed off the lester hub to allow for the extra disc? Do you know anyone with a really big lathe? Cheers, Terry.

jaguar · « **Reply #98 on:** June 25, 2011, 06:51:08 PM »

Well im not sure about what the lesters are modeled after but i would have to assume the 71 and on hub

If you look at my pics i think its the disc that is closer to the fork leg that is correct and the one that sits further from the leg that is the "odd" one.
If I were to space the disk out to match the other side i would run into clearance issues with the speedo and disc mounting bolts

It really freaked me out as i assumed that things would be symmetrical but i guess its just not to be

Do you have any pics of the clearance on both sides of your bike?
What hub are the abe henrys built from?

Terry in Australia · « **Reply #99 on:** June 25, 2011, 07:49:22 PM »

Sorry mate, I looked everywhere for a better pic, but couldn't find one, but looking at your pics again I can see that spacing is about the same, so yours will work fine. I'm guessing the HA's have the same hub spacing as the K1-K6 hubs. Cheers, Terry.

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Author Topic: CB750 K1. Dont drink and ebay project.... (Read 44354 times)