Money pit CB175

XLCafeTracker

New Member
Joined
Jun 14, 2026
Total Posts
7
Total likes
3
Location
Lethbridge Alberta Canada
I’m planning on picking up a 72 CB175 later this week or next week (June 2026).

The engine is seized and the seller misplaced the rebuilt carbs 🙄, I’ve already tracked down some carbs for it so I’m not too worried, I’m also getting the bike for a really good deal. I did motocross in my teens and have rebuilt a few vehicles over the years so wrenching isn’t a stranger to me.

My plans are to hone the cylinders (hope they don’t need to be bored) and do a ring job, then source from those guys in Houston the electronic ignition kit with coil, regulator/rectifier kit (will that upgrade my electric system to 12v from 6v? I can’t seem to find the info)

After getting the engine sorted suspension and braking is on the menu, I’m not a big fan of drum brakes so for the front I’m looking at either CBR125 forks which are 31mm so will fit oem triples but I’m not sure if the length is the same as the CB175 forks or Honda Grom inverted forks which I might be able to use the Grom triple with a new stem machined or a new Cognito motors triple tree.

Any suggestions appreciated.

I’m in southern Alberta just in case anyone else is in the area.

I think I titled the thread right.

Edit: well the original plan got nixed as the bike sold as the same time as I found a trailer to bring it home.
 
Last edited:
Money is like time. It’s just a construct.

Ok. Onto the front disc thing. You’re going to need to swap the entire front end. Triples, bearings, axle/spacers, wheels, shock lowers and tubes.

You’ll also need to adapt it to the 175 head tube, which is a 48.5mm ID. Hop over to the All Ballz website and run the fork conversion calculator - it’ll give you every production front end that’ll fit.

When it comes to a spoked front end, it’s super thin - what kind of final product build are you going for?
 
EzPete said:
Money is like time. It’s just a construct.

Ok. Onto the front disc thing. You’re going to need to swap the entire front end. Triples, bearings, axle/spacers, wheels, shock lowers and tubes.

You’ll also need to adapt it to the 175 head tube, which is a 48.5mm ID. Hop over to the All Ballz website and run the fork conversion calculator - it’ll give you every production front end that’ll fit.

When it comes to a spoked front end, it’s super thin - what kind of final product build are you going for?
Click to expand...
Cafe brat style

I discovered the cbr125 forks are longer than cb175 forks by 2”-3”, I know there’s some internal mods that can be done to lower them though. I’ll probably need to use the cbr125 triple.

I’ve looked at all ballz but they don’t list fork length.
 
The 125 triple will require custom machining a tapered bushing to adapt to a commercially available tapered bearing set.

Alternatively, a CB350 or 450 front end is a bolt up fit with a new bearing set.
 
If you use CB175K7 or CB200 fork yokes you can slide the fork tubes through to take up the extra length. Those yokes are a direct swap for the earlier parts.
 
XLCafeTracker said:
I just notified the seller that I lined up a trailer to go pick it up Thursday and the seller told me he just sold the bike to somebody else.
Click to expand...
Honestly, seized engine on a platform that wasn't going to adapt super well to the finished product you were aiming for - you dodged a bullet.
 
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