'73 CB250 - Doing it right this time round.
- Thread starter Green199
- Start date
Habanero52
The Race......is only with yourself!
Did you cut these on a water jet or laser?
Habanero52
The Race......is only with yourself!
WOW!!!! Nice job!!!
Habanero52 said:
Cheers Habanero!
Thinking about the mounting for these at the minute. I was gonna weld them straight to the frame rails, and remove the original mounting points. Now thinking of cutting them in half and butting up against the original mounts for added strength.
Still planning on using the arms and pegs from my rear sets.
Attachments
driveallknight
New Member
Cheers to bookmarking this awesome build!
Im thinking of leaving the main mount for that plate (the one closest to the swinagarm bolt), trimming the plate so it fits onto their but doesn't wrap around the frame rails, and welding it on in place. That way, I have removed about 3/4 of the weight of the plate (replaced by the weight of my rearset brackets), and because it is now welded solidly to the mount and rails it would have more structural integrity than the original bolted plate.
So effectively, I would only have the section drawn in red below.
The only thing is I currently cant remember whether the plate needs to be removed for any purpose so I shall check in the garage today.
So effectively, I would only have the section drawn in red below.
The only thing is I currently cant remember whether the plate needs to be removed for any purpose so I shall check in the garage today.
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Finished the second bracket. There's a bit of overcut on one of them which I may try and file out soon but at the minute i'm not fussed. I'm sure once its powdered over you won't even notice it.
Next up is to get them drilled and welded on. Then drill the slots on the number plate bracket so I can mount it.
Next up is to get them drilled and welded on. Then drill the slots on the number plate bracket so I can mount it.
Attachments
Green199 said:
I'm now thinking of leaving this original plate bolt-on, but trimming it very close to the frame rail. As it has only one fixing until the swingarm bolt is fitted, the proximity of the cut and the frame tube will in essence act as an 'anti-rotation' device. The only downside to this is a reduction in the structural rigidity that the plate is there to provide.
The welding approach will make it much more difficult to position the swingarm with its dust caps and seals in the correct place. Ideally the plate needs to be removed in order to give the components enough space for assembly.
Rather than re-invent the wheel, i've been looking at some 250/350 race bikes to see how they deal with removing the passenger peg bracket.
I found a solution on eBay which is similar to what I was envisioning. The plate which replaces the bracket is now welded on to the frame tube, and supports the swingarm pivot bolt. So i'm gonna try and create something similar.
The frame is shown below!
http://www.ebay.co.uk/itm/Honda-Cb350k4-Race-Frame-/181858731826?hash=item2a57a00732&nma=true&si=TS7FkjeAxRTQaz247f5deASZTA8%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
I found a solution on eBay which is similar to what I was envisioning. The plate which replaces the bracket is now welded on to the frame tube, and supports the swingarm pivot bolt. So i'm gonna try and create something similar.
The frame is shown below!
http://www.ebay.co.uk/itm/Honda-Cb350k4-Race-Frame-/181858731826?hash=item2a57a00732&nma=true&si=TS7FkjeAxRTQaz247f5deASZTA8%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
Has anyone ever had experience with gasless MIG welding?
With the few frame mods I need doing, i'm looking at learning how to weld myself so that I can complete them at my own pace. Just looking around for a MIG welder I can get my hands on, and all I can find is the gasless versions. Are they worth it, or should I pay the extra £100+ for a proper gas MIG setup?
With the few frame mods I need doing, i'm looking at learning how to weld myself so that I can complete them at my own pace. Just looking around for a MIG welder I can get my hands on, and all I can find is the gasless versions. Are they worth it, or should I pay the extra £100+ for a proper gas MIG setup?
DohcBikes
Fuck You.
There is no such machine as a gasless MIG.
MIG=Metal Inert Gas. You are referencing a Flux Cored Wire Feed welder.
Buy a MIG/Flux welder. You don't have to buy all the gas equipment right from the start, just buy the welder and run flux cored wire until you can afford a bottle, gauges, etc.
MIG=Metal Inert Gas. You are referencing a Flux Cored Wire Feed welder.
Buy a MIG/Flux welder. You don't have to buy all the gas equipment right from the start, just buy the welder and run flux cored wire until you can afford a bottle, gauges, etc.
DohcBikes said:
True, but they are widely known as gasless MIG over in the UK. Obviously that's due to the shielding gas being produced by the flux cored wire....anyway.
Have you had experience using flux core wire? Is it any easier to weld with compared to standard MIG, and do you get the same penetration etc?
JustinLonghorn
No Purple Hearts, No Blue Ribbons
You can get good penetration with Flux-core, but it is a messier weld. Throws slag all over the place. Nothing a grinder can't clean up.
If you're going to do a fair bit of welding, it's worth it to pony up for the gas bottle of 75/25 industrial mix. Flux core wire costs more and it's messier. Some people use the flux core outside because it's not affected by wind. If your welder isn't going to be moved around much, or if you're putting everything on a cart, get the bottle. That said, it's more important to have infinite adjustments on the voltage and wire speed. Many of the cheaper welders are less adjustable.
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