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CB750 Barn find project - First Timer
Underdog1:
--- Quote from: Trigger on June 05, 2018, 06:31:30 PM ---That is one bad tank, you will have to used Electrolysis to get that anywhere near clean. Or take it to a pro chemical strippers.
--- End quote ---
I had a crack at electrolysis ages ago, whilst a little bit bubbled up i think that the layer of varnish stopped it working properly which is why im trying to chemically attack the varnish this time round. If i don't make any headway after a few DIY attempts ill take it to a pro
Rob62:
Good thread! Be interesting to see it all coming together... 8)
Underdog1:
No real progress with the tank after 24 hours. Its removed exposed rust as the filler cap hole just wiped clean
I drained the vinegar out but it was still clear
Decided to throw in some nuts and bolts with a litre or so of vinegar and shake for 10 mins resulting in some varnish chunks being knocked loose. Drained again.
Refilled and will leave it another 48 hours before trying another method.
This is what was knocked out by nuts and bolts
and where the chunks have come away from inside the tank it looks like clean metal which is kind of encouraging, although i feel rust is easier to deal with than old fuel varnish
The powder coater had concerns of the contrast between the gloss and satin black i had chosen so i popped round so he could show me some samples. Decided to go for gloss and matt as the matt he uses isnt as flat as i thought it would be. The bits are ready to be coated now.
Postman came again this morning and dropped off my Chinese special ultrasonic cleaner which im going to use on the carbs. Smaller than i thought (2l) but will fit a striped down carb in one at a time which is all i need really.
Have applied for a dating letter from VJMCC. As i don't need to MOT this bike i can apply for the UK registration as soon as my 55/5 form gets here from the DVLA, even with the bike still in bits.
Rob62:
Let us know how you get on with the dvla
Underdog1:
Just got back from a few days away and the old fuel varnish situation hasn’t changed. I left a piece in a capful of thinners too as an experiment but it was still very much in one solid piece with the thinners all evaporated... the powdercoater suggested steaming it out but might need to take it to the radiator shop. Interesting side note - the zinc coated bits and bolts i threw in there s few days ago to shake around for 10 minutes I wiped off with shop towel and left on the side. The vinegar completely removed the zinc coating on them!
Unfortunately whilst all the hits have been painted I wasn’t able to pick them up today, was hoping to have the engine in the frame at least tonight but no cigar.
I have however completed all my paperwork for the DVLA, wasn’t as difficult as first thought as half of t is irrelevant anyway.
Plan is to get the engine in the frame with headstock and swing arm on at a minimum tomorrow depending on how much free time I have. I brought the engine home today, forgot how difficult it is to get in and out of a saloon boot single handed ;D
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