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Discussion Starter · #1 ·
So I'm new to the bike world and wanting to change from drum to disk on the front brake. I've got a 1980 cm400t and a 2004 honda rebel parts bike. No engine on the rebel but was thinking of swapping the front tire and the brakes to the cm400t. Does anyone think I'd have any issues?

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Your CM400T and your Rebel should both have disc brakes.
 

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You most likely have a CM400E . Spoked wheels and drum brakes, no tachometer.

The drum brake lower fork legs are different. You might be able to swap the entire front end though. You'd have to measure the two and compare.
 

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I think the fork tubes on the 400's are 33mm dia. and I think you can swap the forks from the disc brake 400 into your triple clamps along with the front wheel & caliper.
 

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The CMX250, Rebel, has 33mm forks. All Balls Racing conversion chart does not show a compatibility with the CM400 Fork conversion | All Balls Racing so that make me think there will be some sort of stem issue besides the normal length question. Using the 400 triples could work but I suspect the the front end of the CMX is narrower which would mean using the 400 axle, possibly different wheel bearings and getting the caliper aligned to the new rotor position.
Also in this information is the CMX250 uses a 3.00/18 tire which is 80/90/18 in metric, narrower than the 400.
It's worth a try though, disc braked spoke wheels
 

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The CMX250, Rebel, has 33mm forks. All Balls Racing conversion chart does not show a compatibility with the CM400 Fork conversion | All Balls Racing so that make me think there will be some sort of stem issue besides the normal length question. Using the 400 triples could work but I suspect the the front end of the CMX is narrower which would mean using the 400 axle, possibly different wheel bearings and getting the caliper aligned to the new rotor position.
Also in this information is the CMX250 uses a 3.00/18 tire which is 80/90/18 in metric, narrower than the 400.
It's worth a try though, disc braked spoke wheels
On the 350/450 series, the fenders are different between a disk bake and drum brake model too. The difference is around the caliper. Better check this too. Let us know how this comes out.
 

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Discussion Starter · #7 ·
Thanks for all the info. And I will definitely let you all know how it turns out. I'll get some pics up as I got through with the swap

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