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The Shop
But, for goodness sake, if you are, or are not the welder, get that OEM 'snot blob' on the chain guide mount re-done!. Yes, it can't be seen, but, whats a bit of machining and grinding and about 1.5" of weld bead, after you've already had around 26" to 30" of weld bead laid on.
PS - I do understand the costs of 'things', and the limits you have to stop at, at times. I'm not sure how much Bormi Parts swingarms are (and I've seen a whole bunch of pictures of varying types from them, so they may have a price range for different types) , but I met a bloke at a Road Race meeting that had what he said was a HRC / Mugen Coke Bottle Swingarm on his 89 CR500 he had on display. I think the figure he semi admitted he paid was well over $3,500 AUD.
(modified on the basis of an OEM)
Yes I am the welder and yes I made a foolishness: So yes there is a stop / recovery on the weld seam.
I did not want to take a new rod of metal filler ... This does not affect the benefit of the thing because it is made in the rules of art.
This swinging arm is made by him, I was able to meet him at home when I moved to see him and talk together.
At the time I wanted to see the work of others, and there is nothing to say bad ...
Nothing wrong with a 'stop' in weld.Whereas, as you know, a 'crater' sucks. And, I sure as f**k didn't point that 'stop' out.. You have. I have them on many of my longer welds. I'm getting old, unsteady, have trouble 'rolling' the weld rod through my fingers, and am half blind (legally, now, as of a few weeks ago) .
What I pointed out was that dreadful weld on the outside of the forward chain guide bracket, which, I take to be, ex-factory. Ugly as sin, but, more importantly, not particularly strong, if compared to you cleaning it up, and doing a full run along it's edge with one of your superb welds.
Hell, the 'stop' that you highlighted, makes it mirror what was so often on Works Bikes. I've an extensive collection of frame construction pictures from various HRC (and other Works bikes) both Dirt and Road Race, and, they are generally structurally fine welds, but, at times, not aesthetically perfect welds, by blokes doing a very difficult job, and, generally, the same blokes are doing the rest of the fabrication. Not someone just plonked in a welding bay, joining pre - fabricated metal components together, with perfect set ups for bead runs, and, often, automated hand feeders.
And, your picture of the Bormi Parts swingarm, with the pressed. delta box style main arms, is yet another example of their wide variations of product, that I mentioned. I'm a real admirer of His / their work .
I'll put up some pictures of my hare brained PDS conversion on my CRE 500 I did, if you want. There are plenty of 'stops', and wobbly welds to see. And, one Tungsten inclusion from when my Grand Nephew came up behind me during a long weld run, and said "Boo!" The weld bead inches to do the conversion (which includes an airbox, and my, that has some wobbly welds) , amounts to, probably, (well) above two hundred. Yup, I'm a silly old bugger, but, I make things myself, and make things that I want. And that was, a PDS , Ohlins equipped back end on my CRE500, together with a huge amount of other things that make it mine.
As You, are doing with this (these) bikes. You are that rare individual among most bike builds / bike blings, that is actually making a good proportion of the project(s) - Bravo!
It's a very cool build.
DXF file for laser cut, grade T40 or TA6V...
Before
With more Radius on it
Pit Row
144mm Rod for 89mm piston
Comparison of crankshafts and Pistons
WARNING : This one is just for comparison because it turned out to be just a good idea, but a product does not deserve to go into my project.
Pant Crank with Wössner Rod 144mm with out piston pin bearing = 4744 Grams
Weight with bearing piston pin : 4947 Grams
Post a reply to: 500 Two Stroke project. "I hope to end up in 2023"