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CB750 Barn find project - First Timer
Underdog1:
--- Quote from: SteveD CB500K0 on August 27, 2018, 07:16:50 AM ---
--- Quote from: Underdog1 on August 26, 2018, 08:02:57 PM ---I did fanny about with the peacock a fair bit during breakdowns
--- End quote ---
I should resurrect the old “Quote of the Month†thread
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--- End quote ---
Hah peacock! Bloody iPhone autocorrect always makes me post weird stuff ;D
Underdog1:
--- Quote from: K2-K6 on August 27, 2018, 08:26:41 AM ---Plug doesn't look crazy, bit dark but the main electrode is burning clean-ish so not too far off and would probably show better if it ran for longer.
They really will do over 3 miles on one fill of the float bowls as I routinely turned mine off on the way home to leave it parked as good habit when riding them.
Hope you've found the reason and nailed that one down.
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Will be nice if it’s that simple, going to to some laps of the block so if I break down I won’t be too far and also bring a backpack full of tools to check plugs, fuel, coils, battery etc.
As I mentioned earlier the carbs have only been bench synced, needle clips are in the middle position so could move them down a notch or two to raise the needle for a leaner mix. I’ve ordered a carbtune pro to properly sync them too.
I’m happy I’m in the ballpark with the jets as it was basically a guess
Underdog1:
Seemed ok on a 15 minute ride, came back in as the front brake was feeling pretty absent. I’ve got braided lines and a rebuilt caliper (reused the piston as it seemed ok) and new master cylinder, it’s been ok up until now but just felt like it wasn’t stopping the bike to the point where I met a car in the lanes and had to use the rear brake heavily to stop. Haven’t yet adjusted it as I can’t get the front wheel in the air without taking the headers off which means new crush gaskets, will get around to it soon though but I think it’s maybe more than just out of adjustment. It’s been bled properly and the lever is feeling hard.
Something else I’ve noticed is one of the oil lines has a small drip where the end fixing is crimped on. I take it this can’t be overhauled?
With regards to the carbs overflowing, I fitted the overflow hoses and since then not had anything out of them, can’t see why that would make a difference though.
UPDATE: just seen the price of those oil hoses :o
Underdog1:
So thankfully it seems it’s the washer on the oil tank drain bolt leaking rather than the oil hose, I’ll replace the washer at some point and see if it makes a difference.
The seats currently with a local upholsterer getting sorted, have received a Morgan carbtune pro so I’ll hopefully have the carbs dialled in soon (unable to work on it this weekend though).
The carbs are still dumping fuel seemingly randomly. I’ll put the bike away and switch the fuel off, tinker around with a few things and still no fuel dumped.. but when I come back into the garage the next day there will be fuel ok the floor. Sometimes it doesn’t happen for a few days and all of a sudden it justs dumps the fuel whilst sat doing nothing...
They floats seem ok, if they were at incorrect heights or whatever surely it would just overflow straight away?
Honda Al:
--- Quote from: Underdog1 on September 01, 2018, 05:03:32 PM ---So thankfully it seems it’s the washer on the oil tank drain bolt leaking rather than the oil hose, I’ll replace the washer at some point and see if it makes a difference.
The seats currently with a local upholsterer getting sorted, have received a Morgan carbtune pro so I’ll hopefully have the carbs dialled in soon (unable to work on it this weekend though).
The carbs are still dumping fuel seemingly randomly. I’ll put the bike away and switch the fuel off, tinker around with a few things and still no fuel dumped.. but when I come back into the garage the next day there will be fuel ok the floor. Sometimes it doesn’t happen for a few days and all of a sudden it justs dumps the fuel whilst sat doing nothing...
They floats seem ok, if they were at incorrect heights or whatever surely it would just overflow straight away?
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I’ve had this recently on my 500. At first I thought I left the fuel tap on, but realised that the fibre washers in the petcock housing had failed and were leaking fuel through the tap down into the carbs. They would then overflow onto the garage floor.
Quick test is to lift the fuel tank, and place it on a flat surface with a tray under the petcock. If the petcock is switched off but fuel starts gathering in the tray, there’s the source of the problem.
Hope this helps.
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