Pete12
Been Around the Block
Long time lurker, first time poster...
Picked up a CB450 from a mate for free with the idea of turning it into a street tracker. I built an RD350 racer last year that turned out OK, so this is being built for my brother. His only request was that it be fitted with pillion footrests and a long enough seat to fit his girlfriend's behind on behind...
https://i.imgur.com/HhKoLA0.jpg[/IMG]]
It was pretty weathered externally, but turned over freely with good compression.
https://i.imgur.com/lwiwtJN.jpg[/IMG]]
The outer covers were a bit knocked around so we found another CB450 on Gumtree for $210 that was incomplete and had been seized at some stage. The frame was in good condition so we decided to use that and keep the other one complete for the mock-up stage.
I had a set of YZ250 Excel hubs that I bought for my race bike years ago, so they have been donated to the project. I ordered 19"x2.75" Sun rims and S/S spoke from Buchanan's and laced them onto the hubs...
https://i.imgur.com/q98Cbx8.jpg[/IMG]]
https://i.imgur.com/xxGXl3v.jpg[/IMG]]
..and fitted them up with some DOT approved Shinko flat track tyres.
https://i.imgur.com/y3Z4T5n.jpg[/IMG]]
I started the frame mods by pulling the steering head back a couple of degrees to 25 to give it a tracker stance.
https://i.imgur.com/WBB02j3.jpg[/IMG]]
Obviously the bigger diameter wheels and pulling the steering head back has affected the trail and the wheelbase, so I plotted it out on AutoCAD to work out the new values for swinging arm length and fork offset. I made a new square section swinging arm that will bring the wheelbase to 55"-56". It still needs to be gusseted at the front and the shock mounts installed but it is OK for the mock-up.
https://i.imgur.com/HHxYYCV.jpg[/IMG]]
I also made all the hardware for the back wheel adjusters but still have to make an axle for it.
https://i.imgur.com/GDMEZAb.jpg[/IMG]]
I ordered a big hunk of 6160 aluminium that arrived a couple of days ago so I will start making the triple trees tomorrow night.
Please excuse the photo's, they are a mix of camera and phone and I have had a hell of a time trying to post them on here, so I will try and correct that for any future shots.
Picked up a CB450 from a mate for free with the idea of turning it into a street tracker. I built an RD350 racer last year that turned out OK, so this is being built for my brother. His only request was that it be fitted with pillion footrests and a long enough seat to fit his girlfriend's behind on behind...
https://i.imgur.com/HhKoLA0.jpg[/IMG]]
It was pretty weathered externally, but turned over freely with good compression.
https://i.imgur.com/lwiwtJN.jpg[/IMG]]
The outer covers were a bit knocked around so we found another CB450 on Gumtree for $210 that was incomplete and had been seized at some stage. The frame was in good condition so we decided to use that and keep the other one complete for the mock-up stage.
I had a set of YZ250 Excel hubs that I bought for my race bike years ago, so they have been donated to the project. I ordered 19"x2.75" Sun rims and S/S spoke from Buchanan's and laced them onto the hubs...
https://i.imgur.com/q98Cbx8.jpg[/IMG]]
https://i.imgur.com/xxGXl3v.jpg[/IMG]]
..and fitted them up with some DOT approved Shinko flat track tyres.
https://i.imgur.com/y3Z4T5n.jpg[/IMG]]
I started the frame mods by pulling the steering head back a couple of degrees to 25 to give it a tracker stance.
https://i.imgur.com/WBB02j3.jpg[/IMG]]
Obviously the bigger diameter wheels and pulling the steering head back has affected the trail and the wheelbase, so I plotted it out on AutoCAD to work out the new values for swinging arm length and fork offset. I made a new square section swinging arm that will bring the wheelbase to 55"-56". It still needs to be gusseted at the front and the shock mounts installed but it is OK for the mock-up.
https://i.imgur.com/HHxYYCV.jpg[/IMG]]
I also made all the hardware for the back wheel adjusters but still have to make an axle for it.
https://i.imgur.com/GDMEZAb.jpg[/IMG]]
I ordered a big hunk of 6160 aluminium that arrived a couple of days ago so I will start making the triple trees tomorrow night.
Please excuse the photo's, they are a mix of camera and phone and I have had a hell of a time trying to post them on here, so I will try and correct that for any future shots.