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Doms CB550F1 project
McCabe-Thiele (Ted):
--- Quote from: DomP on May 30, 2025, 06:15:33 PM ---only solution is to cut the tab off and weld it back correctly, not looking forward to that!
--- End quote ---
In the absence of welding is there any way you could alter the existing slot so that the panel tag will fit ?
e.g. Open the slot or file it so you could attach a sort of extra cover plate with a small bolt or pop rivet to hold it in place?
Might be too much of a bodge, are there alternative ways of holding the covers in place with a stud latch on the frame?
DomP:
I am thinking this Ted, not sure what the plan is yet. I've got a cheap mig welder but it's splattery and inaccurate (my excuse anyway) my brother has a stick welder which he says is more accurate, might try that on some scrap first.
K2-K6:
--- Quote from: DomP on May 31, 2025, 09:31:28 AM ---I am thinking this Ted, not sure what the plan is yet. I've got a cheap mig welder but it's splattery and inaccurate (my excuse anyway) my brother has a stick welder which he says is more accurate, might try that on some scrap first.
--- End quote ---
Definitely worthwhile to practice on something first.
Hot tip ..... keep any welding rods (anything "fluxed" really) in an airing cupboard. The flux is hygroscopic and so absorbs moisture, spatters like buggery when used.
Be generous with thickness of new tab as the weld will be more even between thick frame wall tube and bracket from them being more equal. Welding very thin plate to thick will just make it harder as it melts the thin first.
Try and drag the stick tip to get arc rather than stab it, it'll usually spark up easier without getting stuck. Always gets stuck = raise amps. Always blowing away material = drop amps.
The "stick" on non mig should be definitley a little less diameter than thickest material as general guide.
DomP:
Thanks for the welding tips K2, might come to that but I can just about force the side cover on if a distort it so I may just do as Ted said and file the tab hole out by 4-5mm rather than set my bike on fire.
I took it out for a little test ride this afternoon, not perfect yet, it's bogging down/hesitating at lower revs. That was at 1½ turns out on all carbs so I returned home and tried at 1¾ turns out, may have been some improvement but I had to call it quits for the day when a neighbour calld around. It crossed my mind to check the timing while running with a strobe, it was slightly retarded so i adjusted to the F mark, its advancing as it should when revved, its only running on a bench sync so I'll get my Morgantune on it tomorrow. Keep the revs below 5k for the first 1k miles?
Oddjob:
500 miles is ok Dom, then start to increase every 100 miles. So 6K at 600 etc.
Try and use the choke when it starts to bog down, if it gets better it's too weak, if worse it's too rich. Just a small amount, not full choke. I suspect the mixture.
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