CB100 Fork Coverstion from 250 Rebel Question

[travisvisual]

Hello, First time posting and probably not my last haha.

Just pick up a 73 CB100 and looking to do a complete tear down and make it a fun little street tracker. Looking to stick a better and bigger front end on there, especially to get disc brakes.

From reading on the forum and searching through google over the last week or so, it seems taking a front end from a 250 rebel seems like the easiest option?

My question is, is there anybody on here that can give me some advice on this conversion? Did you have to use your stock CB stem or was it pretty bolt on? Did it change the front end height dramatically? If so how did you lower the front end, or which option did you go with.

Thanks in advance.

Travis

 

[CALfeRacer]

I swapped a CM200 (pre-rebel) front end on to a CB125 and I just bought alballs bearings, since they are the same size between the two. Not sure how different the rebel front end is in the stem department, but I'd assume it to be similar. I would recommend lowering the forks since they're significantly longer than the 125 forks (assuming 100 forks are similar). Look here http://scandalon.com/2009/06/motorcycle-steering-stem-bearing-size-chart/ and at the front end conversion page at allballsracing.com to get a better idea.

 

[travisvisual]

Thanks for the info, I actually got the Rebel idea from Allsballsracing. I think i will purchase just a triple tree first to see how it fits then start from there. How did you lower your front end?

Thanks for the info!

 

[CALfeRacer]

The difference was small enough that I slid the forks up in the trees, but I bet the rebel forks are longer, being a cruiser. There should be a few articles about internal fork lowering on here, I'd read tjosr

 

[travisvisual]

So after doing some more reading, since the CG125 is more similar of a size compared to the rebel I came across an idea. What if I used triples from a 91-04 nighthawk, since the bearing size is the same. Then since the fork diameter is 31mm I can use the fork tubes and brake assembly from a 04-06 CG125. The only thing I am not sure about is the axle size, since at that point i need to figure out my wheel situation. Does that sound like it would work or am i crazy?

Thanks again!