View Full Version : I needed somethinng to ride... cb450 chobbler

04-30-2015, 6:54 AM
It looks as though my xs650 is going to spend another summer on the table and I needed a freedom machine for this nice weather. I worked a deal with a guy I met at Barber last year that involved a Honda mini trail 70 and this cb450. I don't know this for certain, but I suspect that the bike was never ridden after it was 'bobbed'. Who actually did the work is unclear, but it has been passed through several people (with no one admitting it's their handiwork). At any rate, I received it as a mostly complete machine. On to the pics... http://i1293.photobucket.com/albums/b599/Dieselchanic/883C05C1-110D-4BB0-B082-15C1921518C0_zpsainsnl37.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/883C05C1-110D-4BB0-B082-15C1921518C0_zpsainsnl37.jpg.html) http://i1293.photobucket.com/albums/b599/Dieselchanic/5BDB7879-725B-4E80-AD6E-CF53E5A770DF_zpsueqm6btl.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/5BDB7879-725B-4E80-AD6E-CF53E5A770DF_zpsueqm6btl.jpg.html) http://i1293.photobucket.com/albums/b599/Dieselchanic/88A3379B-C41E-44CF-A0B2-E5FB87408256_zps3dd2fis3.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/88A3379B-C41E-44CF-A0B2-E5FB87408256_zps3dd2fis3.jpg.html) http://i1293.photobucket.com/albums/b599/Dieselchanic/24D484A6-23C4-48A5-B907-D5121B4C96DE_zpsdl8wnn6u.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/24D484A6-23C4-48A5-B907-D5121B4C96DE_zpsdl8wnn6u.jpg.html) I gave it a wash and checked it over. Front brake wasn't working, so I messed with it then it stuck.... Battery was a goner. I hooked up the charger and turned the key and it had lights. Good sign... So I gave it a little ether and kicked it over. It started up! Well at least most of the wires are going to the right places.. So after filling it up with gas and trying it some more I got it to run. Carbs leaked gas (partly due to the extreme lean while on the kickstand) but otherwise seems pretty solid. I removed the front brake assembly because it will have to be cleaned and freed up and threw a battery in it and took it for a spin. It started out ok but as soon as I got on the road I started smelling something and it was smoking... Turns out the fender was touching the tire on the inside... Back to the shop where I yanked that off too.. So then I tried again and it did ok. Runs pretty well and must be jetted pretty heavy because it's wide open pipes and no air filters and runs strong with no hesitation. The front forks are low on oil or something though so they just boing and with the high ride height and rigid tail makes for a very weird ride. http://i1293.photobucket.com/albums/b599/Dieselchanic/7E8CFAD4-3166-475A-BC01-56A1C5A25214_zpso7wy2m6b.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/7E8CFAD4-3166-475A-BC01-56A1C5A25214_zpso7wy2m6b.jpg.html)

04-30-2015, 7:33 AM
So after establishing that the machine would travel under its own power, I set about turning it into something I could ride every day.

The headlight was an old Unity spotlight. It was mounted off the gauge mounts on the top tree and was aimed at the moon with no adjustment available. It also still had the spot bulb in it. So instead of putting a bunch of work into it to make it serviceable, I pulled it off and mounted a new light I had in the shop. New light mount:

http://i1293.photobucket.com/albums/b599/Dieselchanic/206BBBDF-9897-4AD2-906B-F0D19F170E1E_zpsbrgvrtoo.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/206BBBDF-9897-4AD2-906B-F0D19F170E1E_zpsbrgvrtoo.jpg.html)

There was a chain clearance issue with the swingarm so I cut 2" out of the 'hardtail' and swung the swingarm up and welded it back up. Helped the looks a lot too imo. I also slid the forks through about 2" also, I want to know how far to lower them when I take them apart to rebuild them. I wanted to change the bars too but I can't get the left grip off and I don't have any other grips at the moment. So this is how it sits as of last night.

http://i1293.photobucket.com/albums/b599/Dieselchanic/DA37745E-56FE-4FC3-B320-BD631114A542_zps3urge7g1.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/DA37745E-56FE-4FC3-B320-BD631114A542_zps3urge7g1.jpg.html)

http://i1293.photobucket.com/albums/b599/Dieselchanic/25AA984B-5060-4D48-8D0D-A1F41B6E5B61_zpswpyodrdj.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/25AA984B-5060-4D48-8D0D-A1F41B6E5B61_zpswpyodrdj.jpg.html)

http://i1293.photobucket.com/albums/b599/Dieselchanic/55FCD0A4-44A3-4A69-9DE9-D83171437A43_zpssq79iudv.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/55FCD0A4-44A3-4A69-9DE9-D83171437A43_zpssq79iudv.jpg.html)

04-30-2015, 12:00 PM
solid platform. What are the plans for the cb after the xs is done?

04-30-2015, 1:32 PM
solid platform. What are the plans for the cb after the xs is done?

I plan to ride it like this until I get the other bikes out of my shop (I have three bikes that aren't mine I'm working on) then I'll see if I work on this it the xs but the end plan is to go back with suspension and a simple flat seat on a looped frame section.

04-30-2015, 7:08 PM
Nice dude. Subscribed.

04-30-2015, 9:22 PM
I swapped out the bars tonight. Turns out that the riser spacing is the same on this bike as the xs650 so I mounted up a set of polished SS bars I made a while back for the xs. I also used the shorty clutch lever and single throttle I had laying around.

http://i1293.photobucket.com/albums/b599/Dieselchanic/84C98F44-E0AC-4199-81AC-A9D50DE059A6_zpsr8w7tpto.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/84C98F44-E0AC-4199-81AC-A9D50DE059A6_zpsr8w7tpto.jpg.html)

http://i1293.photobucket.com/albums/b599/Dieselchanic/BB27480D-3488-46E5-B6D1-849175A488B2_zpsv4hoxn7v.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/BB27480D-3488-46E5-B6D1-849175A488B2_zpsv4hoxn7v.jpg.html)
(Promise I'll turn that fork leg around in the future...)

I mounted up a small taillight.

http://i1293.photobucket.com/albums/b599/Dieselchanic/0F62E147-8690-4103-AE84-B53822C37D42_zpstqdavj8k.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/0F62E147-8690-4103-AE84-B53822C37D42_zpstqdavj8k.jpg.html)

Took it for about a ten mile rip. Fun little scoot.

http://i1293.photobucket.com/albums/b599/Dieselchanic/EDE30865-908A-4ABA-9740-63097B0B7F9E_zpsa8wipghm.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/EDE30865-908A-4ABA-9740-63097B0B7F9E_zpsa8wipghm.jpg.html)

05-01-2015, 5:46 AM

05-01-2015, 7:45 AM
nice little bar hopper

05-08-2015, 3:45 PM
Thats a pretty sick little ride. I understand the need for freedom completely. Working on a Honda shaftie... will post pics...

05-15-2015, 11:35 AM
I decided to redo this bike a little bit since I finished a few other projects in my shop. I cut the weirdo hardtail off to make way for something new. Not exactly sure what it will end up like, just flying by the seat of my pants.

http://i1293.photobucket.com/albums/b599/Dieselchanic/0ABCD3D6-1781-4A74-8CB0-36E0D95FB80A_zpsteaizndg.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/0ABCD3D6-1781-4A74-8CB0-36E0D95FB80A_zpsteaizndg.jpg.html)

http://i1293.photobucket.com/albums/b599/Dieselchanic/C0FD5382-CF76-493E-B59B-173193DAEFD9_zpspaxelokc.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/C0FD5382-CF76-493E-B59B-173193DAEFD9_zpspaxelokc.jpg.html)

05-15-2015, 11:55 AM
That thing looks like it could be a lot of fun. :)

07-18-2015, 8:44 AM
So I decided to go street tracker-ish with this project. I cut off all of the previous tomfoolery and grafted on a subframe off of a kz650 frame I had behind the shop. THAT was a gigantic pita :banghead: It took me 15 weld joints but I finally made the crazy thing fit. I scored a decent cb360 tank off of eBay that just fits the build perfect, and no, I wll NOT be painting that. That original paint is way too cool. The swingarm had also been cut to accomodate the adding of the 'hardtail'. I repaired it using the shock mounting points from the same kz650 and I'm using the shocks from the same.






07-18-2015, 8:46 AM
Here is my latest bit of progress from last night... I got the frame buttoned up, and will be moving on to an electrics compartment shortly.


07-18-2015, 2:01 PM
Keep it up

07-18-2015, 2:55 PM
I got the tank mounted. I used the standard rubber snubbers in the front, but had to make new mounting points for them. In the back I used a block of closed cell neoprene.


07-18-2015, 9:50 PM
This bike had simplified, or cut down, wiring when I got it, but it was still running the stock regulator and rectifier units. I want to upgrade to a regulator/rectifier unit and build a new wiring harness based around a fuse block and SPDT relays. So... I studied the wiring on the bike and couldn't make sense of what was going on. That got me nowheres. So I looked up a stock wiring diagram and wow, these things are messed up! :o I think (hope) that I can simply wire the three wires from each leg of the stator into the yellow wires on my new reg/rec unit and connect the red and black to the battery and roll. If someone knows more about these old Hondas and wants to chime in I'd appreciate the input. It also looks like this may be a permanent magnet alternator?? If so, I should be able to run just a capacitor since I'll be kickstart only anyways... Or am I way off??

Here's the diagram that corresponds with what I see on my bike:

http://i1293.photobucket.com/albums/b599/Dieselchanic/A73BE62D-4F8A-4AD6-A518-038F3F9C8B63_zpscf2rni98.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/A73BE62D-4F8A-4AD6-A518-038F3F9C8B63_zpscf2rni98.jpg.html)

07-21-2015, 11:27 AM
That original hard tail looked very unsettling before you chopped a few inches off and rewelded it. Happy to see you're getting rid of it all together and doing something new.

08-02-2015, 11:46 AM
I drew up a wiring diagram. I'm using a UT4L battery (kickstart only), 150cc scooter reg/rec, 6 gang fuse block, and two SPDT relays (one for main power switching and one for the headlight hi/lo allowing the use of a SPST toggle). The cb450 uses a 2 phase permanent magnet alternator, so if the rectifier wiring looks funky, that's why.

http://i1293.photobucket.com/albums/b599/Dieselchanic/F91BD54B-2798-41B7-AF33-4B0D1BCC954A_zpspgovmrl5.png (http://s1293.photobucket.com/user/Dieselchanic/media/F91BD54B-2798-41B7-AF33-4B0D1BCC954A_zpspgovmrl5.png.html)

08-02-2015, 6:46 PM
Nice work and diagram.

08-02-2015, 8:14 PM
I got it mostly wired, I still have to mount the components and wire the reg/rec, but it's wired to run.

http://i1293.photobucket.com/albums/b599/Dieselchanic/60622995-ADC5-4046-8643-01F69737C9F9_zpsuya7vabt.jpg (http://s1293.photobucket.com/user/Dieselchanic/media/60622995-ADC5-4046-8643-01F69737C9F9_zpsuya7vabt.jpg.html)