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Discussion Starter · #1 ·
Hey all, new to the board and was pointed this way by a fellow member from ADV Rider.com.

I figured you all would be the best to ask about my current project...I'm rebuilding a CB 450 as my first real-resto/refurbish deal. I don't really intend on keeping it stock and I'm doing a few customizing features. One of which I'm considering would be mag wheels. The original rims are in pretty sad shape and powdercoating them, while my current plan, isn't really what I want. What I really want is a front and rear disc conversion...if it's possible. I don't know much about what it would take, but I would imagine it would take two front wheels? Along with that, what wheels would fit in the front and rear rims?

Sorry I'm not walking in with lots of information, but any advice that could be gleaned would be appreciated!

btw, here's a link to the project!

http://www.advrider.com/forums/showthread.php?t=530256
 

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Sensei
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First we'll need to know what size wheels you want.... 19" front 18" rear?.....
If you are willing to mount a 19 F, 16 R, the XS650 would be a good donor...already available with discs on both wheels......
Note that there are currently NO "bolt-on" swaps that I know of...some effort and machining will be required.......
 

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Hi 66Sprint
Have you done this? I have a CB550 that a PO started to convert to I think XS1100 wheels. My guess is that at the front the Yamaha wheel and fork tubes were put in the CB550 fork trees. It looks to me that the distance between the fork tubes on a XS1100 is just a very little different from the distance on a CB550. The CB550 and CB450 should be the same. At the back I am assuming that the axle diameter is the the same as the Yamaha wheel is in place. But there are no spacers and no caliper or caliper mount. A project for the future.
TomC in Ohio
66Sprint said:
First we'll need to know what size wheels you want.... 19" front 18" rear?.....
If you are willing to mount a 19 F, 16 R, the XS650 would be a good donor...already available with discs on both wheels......
Note that there are currently NO "bolt-on" swaps that I know of...some effort and machining will be required.......
 

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Sensei
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Well, the XS 11 was a shaft drive, so they are probably 650 wheels... If they are 650's, the rear axle IS the same diameter, but the sprocket would require some spacing adjustments to keep the wheel centered on/in the 550 swingarm......The front wheel however uses a much heavier diameter axle, so that is the probable reasoning for the fork swap.....It can also be done using modified Honda forks and/or a modified axle....
 

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Hi 66Sprint
OK not an XS1100. But did the 650s come with dual disks?
One more reason for using the Yamaha forks is mounts for the Yamaha calipers. I expect that they are an improvement over the stock Honda calipers. Speedometer drive ratios are a question that need to be answered. I would be surprised if Honda and Yamaha used the same ratio.
At the back: On a CB550 the front sprocket needs to be spaced out for X or O ring chain clearance anyway. So I would line the wheels up then sort both ends of the chain.
TomC in Ohio

66Sprint said:
Well, the XS 11 was a shaft drive, so they are probably 650 wheels... If they are 650's, the rear axle IS the same diameter, but the sprocket would require some spacing adjustments to keep the wheel centered on/in the 550 swingarm......The front wheel however uses a much heavier diameter axle, so that is the probable reasoning for the fork swap.....It can also be done using modified Honda forks and/or a modified axle....
 

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Sensei
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Front duals were simply a bolt-on proposition on most of that 'period' Yammies.... Front wheels are/use the same basic casting on the 500, 650, 750, and 1100 although I believe there were two possible rim widths (1.85 & 2.15)... Rotor sizes would have to match fork slider/caliper mount heights..... The Later model aluminum bodied calipers might make it worth changing forks...the early cast iron ones are almost always FUBAR... Just FYI, the Honda and Yammie speedos DO have the same ratio... the 'corrections' for rim size (18 vs 19) are within the drive units/wheels themselves on both brands... As long as you have a wheel with its original ratio drive, the top cable end would plug into and read correctly on either "brand" meter.....Tachs are a different story.....
Sprocket specialists can probably help you out on the offset sprocket, but it may be a bit "pricey" if it becomes a "one-off" proposition.....
Sounds like a plan to me.... :D Steve
 

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Discussion Starter · #7 ·
Hello, thanks for the quick responses.

I guess I'd really rather keep two 18'' or 19'' wheels rather than down sizing to a 16'' rear. I suppose I'm going for a more "street tracker" look.

Is this a possibility?
 

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Sensei
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Your answer is easy, now that I know what you are looking for.....
Both wheels from a Yamaha SR500... (see link for pic)
As above, a second front disc can be added if desired....

http://motorbike-search-engine.co.uk/cl ... _sr500.jpg

However, the front 18" wheel from an XS400 uses an axle size that is easier to fit to Honda forks (if you keep them), but requires some machining for the caliper carrier.....
:D Steve
 

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Discussion Starter · #9 ·
wow those wheels are perfect. So what would I have to change to make those fit? I have limited machining experience but do have access to a machine shop (on a Marine Corps base). How much would some wheels like that cost and would I need to replace the calipers?

Barrage of quesions...over lol :mrgreen:
 

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Sensei
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Before I can answer the caliper question, I'll need to know what you already have, and specificly what forks you'll be running.... the 450's ran about 5 different sets.... (Pics with measurements help).... You MAY be able to get it done with a simple adaptor plate made of 1/4" or 5/16" 6061-T6 aluminum.....
As for wheel prices, check for them on eBay or the like... Try to get them with rotors, sprockets and even axles if possible.... New they ARE expensive... You may be able to find an entire SR 500 chassis with a blown engine,or even a "dead' bike and get ALL the parts in a lump (forks, wheels, calipers, rotors, rear master, front master, brackets to mount on your swingarm, etc.....)for what just the new wheels would cost.....
Shop around .............
 

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Most of the swap will involve bearing swaps. Depending on what you decide to use for wheels..

Keep in mind that Steve mentioned the speedo drives on the axle.. The Honda unit and the Yammie ones mount on opposite sides and spin opposite directions... I found out the hard way....


I was doing the swap to XS400/650 wheels. XS650 front (19"x1.85). XS400 rear(16"x2.50) Mine has been put on hold.. I can tell you that the front, I had the stock XS650 axle machined down to replicate the Honda axle on the ends and length, etc, so it would fit the Honda forks without much trouble. Spacers will have to be custom widths.. Depending on what you decide with dual discs and speedo drives. Using them or not basically.. I'd recomend an electronic speedo to eliminate the speedo drive altogether.. That's what I'm planning.

The rear I swapped the bearing over to match the stock CB450 axle size. 6304RS bearings for the 16" wheel anyway... The stock Honda rear axle will now slide in and it's only a matter of spacing the wheel right to center it, then hoping the chain lines up.. The wheels sprocket mounting surface can't be machined down to narrow the wheel if needed because of the stock Yamaha rubber mounted sprocket bolts.. At least in my opinion.. If you go with a 16" XS400 rear then be SURE to get a wheel with good rubber mounted sprocket bolts, as they're unobtanium and cost a mint! Trust me!

I've got a XS650 rear wheel I'll sell you if you want to try it and test your luck with that swap.. IF I CAN FIND IT. For me the easiest route at the time seemed to be the XS400 rear.. I hope I'm right.. :?

Another thing. On the front brake rotors, you'll need XS rear rotors for the front end. They've got the correct outside diameter to use the stock Honda calipers/arms.. The XS front rotors are larger in diameter and will hit the stock Honda caliper arms/mounts... Have a look on Ebay and pay attention to the slots in the middle of the front/rear rotors and you'll see the difference quite easily by eye..


GB :mrgreen:
 

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As mentioned already, an entire front end swap would likely be MUCH easier in the long run.. Probably just swapping stems and spacing the stem/bearings accordingly...


GB :mrgreen:
 

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Discussion Starter · #13 ·
Well, after considering my options (and I want to ride this bike soon), I've decided to drip my stock rims off for powdercoating ("true crome" color). I'll utilize these rims for awhile until I'm able to find a donor SR500...however long that takes. I won't give up but I'll just bide my time. Pics will be forthcoming!

-Matt
 

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As I said, it won't be super easy but the benefit of good looks and tubeless tires would be well worth it in my opinion... The tubeless part is what motivated me after having a flat at 2am 40 miles from home on my supermoto... Plug it, air it up and ride home... :cool:

I did have a wheel swap thread here at one time but I haven't updated it because of my project being put on hold for the time being...


GB :mrgreen:
 

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Discussion Starter · #15 ·
Oh I'm totally with ya here. If I keep the bike for any length of time I'll do the swap but right now my "under $2000" goal has already been shot to hell lol
 
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