Author Topic: New Project / Max. Rear Wheel Sizes? (Read 6823 times)

Cvillechopper · « **Reply #25 on:** August 16, 2005, 06:34:46 AM »

I am almost ready to ride my cb750K chopper project and I've got a 180/ 16 on the rear with stock hub and spacers. I picked up the rim and spokes on e-bay to lace to the stock hub. I've got a hardtail so the real worry is with the rear sprocket clearance but with a swingarm you shouldn't have a problem. People sell the spoke kits and rims on e-bay regularly. Don't know if this helps.

Brookesy · « **Reply #26 on:** August 16, 2005, 05:39:22 PM »

Everything helps -
all good information so far.

I found a small pic. of a supercharged 750 with CBR600 read end on a website.
I'm trying to get more info on it - looks interesting

Lumbee · « **Reply #27 on:** August 16, 2005, 05:57:05 PM »

...I'v seen a CBR rear wheel used on a 750 chop. The guys said he had to move the front sproket out about a 1/4".

Quail "Owner of the comfortable k8" · « **Reply #28 on:** August 16, 2005, 07:41:31 PM »

Will a 78f fit a 78k?

Brookesy · « **Reply #29 on:** August 16, 2005, 08:16:21 PM »

I wonder if it was K engine or F2 engine based...
I think the F2 sprocket is further out (stock) than the K

Does anyone have info on what is required to move the front sprocket out on K1 and F2?
How far can it be pushed out on the stock spindle and how?

I'm thinking of putting an F2 engine in the K frame - does anyone know of any problem involved

Terry in Australia · « **Reply #30 on:** August 16, 2005, 09:16:20 PM »

Brooksey, it's not a problem, an F2 swingarm will fit straight into your K1 frame (I've got one if you want it) I just took it off my K1 as I had no disc braked rear wheel (boo hoo) to go in it. The F2 engine will go into your frame too, I started to collect the parts for my "K9, Junkyard Dog" project, but it fell in a heap when I elected to use the F2 engine (well F2 bottom end with 836cc barrels and Mike Rieck's (Mister Head) head etc that I had on my "racer" project instead.

You can use a K2 front sprocket on the F2 countershaft without any mods required so you can run a 530 chain, spacing a sprocket out is a bit harder, but not impossible, just be aware that if you go too far out you'll need a shaft extension with an outrigger bearing mounted to the inside of the gear selector cover, which'll be pretty tricky. Don't try "off-setting" your rear wheel for chain clearance, that's a dangerous practice. Let me know if you want some fat alloy rims, cheap? Cheers, Terry.

Brookesy · « **Reply #31 on:** August 17, 2005, 12:27:12 AM »

Terry,
Thanks for the info.
i can see what you're saying - i guees the frame will get in the way at some point too.
i will be drawing everything in Cad as i go - just to make sure it works

i'm having fun just planning it etc.

how much do you want for the F2 swing arm? I'm interested

Brookesy

Brookesy · « **Reply #32 on:** August 17, 2005, 01:43:15 AM »

Egil,
Thanks for the email - it came through fine.

Every bit of info helps - it might take me four years too - i hope not

Brookesy

Lumbee · « **Reply #33 on:** August 17, 2005, 05:52:57 AM »

...on the 77/78 models the sprokets are a little farther out, so no, you can't swap K and F wheels unless you deal with the offset some how...adjust the spacers maybe? As far as adjusting the sproket, I'v heard of guys getting a second sproket and grinding it down to the offset they needed and mounting it under the main sproket to provide the offset.

Terry in Australia · « **Reply #34 on:** August 17, 2005, 04:03:37 PM »

Quote from: brookesy on August 17, 2005, 12:27:12 AM

Terry,
Thanks for the info.
i can see what you're saying - i guees the frame will get in the way at some point too.
i will be drawing everything in Cad as i go - just to make sure it works
i'm having fun just planning it etc.
how much do you want for the F2 swing arm? I'm interested
Brookesy

Well it's a very nice swingarm, I think I might have a rear caliper and M/C etc to go with it, so I reckon a 1.125 litre bottle of JD wrapped in a copy of Hustler would be a fair exchainge? Lemme know mate, and it's yours! Cheers, Terry.

Brookesy · « **Reply #35 on:** August 18, 2005, 11:36:23 PM »

Terry,
I'm checking a few options at present -
the Hondachopper site has a few ideas and the boys in the Bris-Vegas SOHC club are helping me out with some info too.
if all goes to plan I'll be meeting up with them and the VJMC boys at the Historic Races here in Warwick in a few weeks
Should be a great weekend

I'll let you know if that's the way i want to go
Have a great weekend
Brookesy

Terry in Australia · « **Reply #36 on:** August 19, 2005, 02:48:47 AM »

You have a good one too mate, don't forget some pics! Cheers, Terry.

dusterdude · « **Reply #37 on:** August 19, 2005, 06:34:11 AM »

cville,i dont see how a 180-16 will fit a stock k swingarm setup.i put a 5.10(130) on mine and it barely fits.

Cvillechopper · « **Reply #38 on:** August 19, 2005, 06:38:14 AM »

Yeh, I realized that the only stock measurement is the hub spacing. I put a hard tail on with more space toward the front than the swingarm has. My bad.

dusterdude · « **Reply #39 on:** August 19, 2005, 06:46:18 AM »

no sweat.#$%* happens

Brookesy · « **Reply #40 on:** February 16, 2006, 05:15:31 PM »

If anyone is still interested...

I picked up an F2 swingarm - it's a lot wider than the K swingarm
i will measure it up soon

I'm hopefully picking up an F1 rear wheel this weekend and trying to make it all work together.

Also found a K2 with an F2 motor - so i bought that too... very rough condition but exactly what i wanted and it came with lots of spares etc.

My spare time lately has been spent drawing up the frame and bits & pieces etc. so i can work it all out before i start buliding it
It looks like (hopefully) if i use the F2 swingarm, F1 hub and some thought, i should be able to make it work.

Next, will be finding out if i can find a late model rear disc brake setup to go with the F1 hub (any ideas anyone?)

I might post some pics in the Gallery when i get a bit further along

Brookesy

Terry in Australia · « **Reply #41 on:** February 16, 2006, 10:47:24 PM »

Quote from: brookesy on February 16, 2006, 05:15:31 PM

If anyone is still interested...

I picked up an F2 swingarm - it's a lot wider than the K swingarm
i will measure it up soon

I'm hopefully picking up an F1 rear wheel this weekend and trying to make it all work together.

Also found a K2 with an F2 motor - so i bought that too... very rough condition but exactly what i wanted and it came with lots of spares etc.

My spare time lately has been spent drawing up the frame and bits & pieces etc. so i can work it all out before i start buliding it
It looks like (hopefully) if i use the F2 swingarm, F1 hub and some thought, i should be able to make it work.

Next, will be finding out if i can find a late model rear disc brake setup to go with the F1 hub (any ideas anyone?)

I might post some pics in the Gallery when i get a bit further along

Brookesy

Sorry Brooksey, I lost interest when I realised you weren't gonna send me a bottle of JD wrapped in a hustler................

Lumbee · « **Reply #42 on:** February 17, 2006, 07:49:25 AM »

...how wide is the tire on that wheel?

Brookesy · « **Reply #43 on:** February 19, 2006, 07:34:56 PM »

That would have been a very expensive swingarm Terry.
I'm pretty certain i'll use the F1 swingarm anyway - i got it a swap meet with axle, spacers etc. for next to nothing.
The F2 swingarm is only 5mm wider across the axle plates anyway and i can use the spacers i already have.

From my measurements
The K2 swingarm is abt 242mm between the axle plates & o/a length is abt 480mm
The F1 swingarm is abt 255mm between the axle plates & o/a length is abt 500mm
The F2 swingarm is abt 260mm between the axle plates & o/a length is abt 520mm

I picked up the F1 wheel - tyre is a 130 / 16 - no good to me - it's too old anyway and the rim is stuffed too.
Only bought it for the hub, which is ok because the hub is the only useable part.

The cush-drive is the same as the k's so i have what i need so far.
I will try to get hold of measurements for a 140 / 17 and 150 / 17 and go from there

Brookesy

BAZ · « **Reply #44 on:** February 19, 2006, 09:40:41 PM »

Quote from: brookesy on July 17, 2005, 07:28:18 PM

Hi everyone,
I'm planning to launch into a new project and i need to check a couple of things.
If anyone can point me in the right direction i would appreciate it.

Here's the plan... ground up build. K2 frame (think i've found one) F2 engine (looking for one)
I want to put a 180 / 15 rear tyre on it and rear disc brake

Does anyone know what's involved or has anyone done it?
Is there a rear swingarm that fits into the frame and will accept the 180 wheel?
What about getting the sprocket out far enough?

Any ideas would be great

Brookesy.

Hey, just curious. Why a k2 frame? Why an f2 engine?

Sorry for the noob question and hijack.

dusterdude · « **Reply #45 on:** February 20, 2006, 05:55:05 AM »

terry,you still have that f2 swingarm?

Brookesy · « **Reply #46 on:** February 20, 2006, 04:10:37 PM »

G'day Baz.

Why? Who knows.

No, really,i have lots of reasons.
I prefer the look of the K but i want the F2 engine due to better performance (apparently)
and the sprocket is a bit further out than on the K engine. (a few mm)
This may allow a wider tyre on the back - but clearing the frame will still limit me (unless i do a chain tunnel... hmmm)

Also, in sunny Queensland i can register a pre '75 bike with no indicators and less restricive exhaust / noise laws
so, K2 - K4 is the way to go.

Egil · « **Reply #47 on:** February 21, 2006, 01:46:02 AM »

Can you move the or mounting an xtra axle whit 2 sprocket on and us those to go for a xtra wide tire .
Try to xplain it`s like a sprockets link ,go from the engine sprocket to a axle between whit 2 sprockets on same size as on the engine so from this sprockets in between to the rear sprocket ,you can then have the tire as wide as you want
Engine
I chain
I-I 2 sprockets
I chain
I
Iwidereartire
It`s a way to go

News:

Author Topic: New Project / Max. Rear Wheel Sizes? (Read 6823 times)

BAZ