I'd think the upper shock mount where it is would be stong enough to support the rear end. The rest of the tubing from there on back is going to support rider weight. Might be a problem is you're 500 lbs. Otherwise, I'd trust it.
I do have one problem with the whole build though... Its just too dang cool!
Honduki
Re: Honduki
Chill out and stay focused. Extra support would be a good idea. Rather than from the bottom of the frame to the back of the seat tubes, you could probably get away with support going from the frame tab pictured to the rear area of the rop tubes. You're obviously a capable welder so try out several options; you can always grind it down and try again.
Re: Honduki
I tend to disagree here. These thin-walled, weak motorcycle frames hold also by steel structure and not by simple steel mass. They are not suitable for multiple welding and grinding jobs. Things are much more reliable if the first weld fits. I would even say that smaller welds may be advantageous in such case.VII wrote:you can always grind it down and try again.
For this reason e.g. for car repair welding in Germany weld seams are prohibited in favour of weld spots.
Cosky's great (free) online manual: http://cosky0.tripod.com
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
Re: Honduki
I've got no problem with constructive criticism, but I do have a problem with people that try to be a smart ass. Its the same problem I have with stock motorcycles and fat women with small cars... they just piss me off. I agree with the comment about just holding my body weight (about 220lbs)I'm going to do some welding this weekend and ill add a bunch of new pics. The way to weld is to tach it into place with a few spot welds before you burn it in. Thats just basic welding knowledge
- Attachments
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- Donor bike
- cb07.jpg (64.03 KiB) Viewed 5445 times
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- New rear brake upgrade
- cb06.jpg (46.54 KiB) Viewed 5445 times
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- New and old, axles lined up. Stock rear tire is the same size as the new front
- cb05.jpg (53.71 KiB) Viewed 5445 times
Re: Honduki
I'm not trying to be a smart arse but you are going to have a lot of force on this tube in this direction and it will be prone to failure, if it was a new piece of Cromoly I wouldn't worry about it, but being a 30 year old piece of steel with an unknown amount of corrosion inside I have doubts on its ability to perform the task you are asking of it without added support and it will be difficult to add the extra support where it won't be visible. Extra support for your body weight would be easy to hide under the seat running forward to the frame backbone. BTW just because it looks good doesn't mean it will work good.
Re: Honduki
I agree that this point might be a problem. Nevertheless I would expect no SMEF(*) here but it would start with easily visible bending. So still time for measures here if really required.
*Spontaneous Massive Existence Failure, known from Douglas Adams' Starship Titanic
*Spontaneous Massive Existence Failure, known from Douglas Adams' Starship Titanic
Cosky's great (free) online manual: http://cosky0.tripod.com
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
Re: Honduki
That looks awesome! I have no idea about the soundness of the frame and all that but I like the retro fitting of the new on the old. I was thinking of trying to find a dual shock swing arm set up so I could get the disc break and a 17" wheel without having to deal with spokes.
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