SOHC.co.uk Forums > CB500/550
CB550 refurb
Johnny4428:
So here’s the confession - after filling the carbs with fuel and quickly discovering I hadn’t closed No3 carb drain screw 😡 I pressed starter button and turned over to nothing more than banging and cracking and misfire I quickly realised something is not right. I kind of ran out of time and left it til later in the day buying myself some thinking time. My instinct was to check valve timing which I did and resulted in the realisation that they were not set right. I had set the valves when I assembled the top end but had set the valves on the exhaust TDC stroke and not the compression TDC 🫢. Anybody tried that? Just me then! After setting them correctly all is well, fired up immediately and running well maybe try a carb sync see what like when I give it a right heat up. Slight leak at camshaft end cap mounting bracket. Is these aluminium sealing washers still available?
nairb:
I always find the first 20+ miles on a rebuilt engine a nervous/fraught time. Especially on a 2-stroke, Best have a change of underwear tucked into the tool kit as well.
SteveD CB500K0:
I did that on my CB175 Johnny.
“We are not aloneâ€â€¦
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Laverda Dave:
Lovely work goinng on there Johnny and in a nice big garage.
McCabe-Thiele (Ted):
--- Quote from: nairb on January 30, 2025, 11:09:13 AM ---I always find the first 20+ miles on a rebuilt engine a nervous/fraught time. Especially on a 2-stroke, Best have a change of underwear tucked into the tool kit as well.
--- End quote ---
First start up rides always fills me with apprension, I remember one of my early runs on the 400 during its two cylinders only period (plug leads not in correct order) as I'm going up a fair hill the engine started to die. I pulled onto the pavement to look on my phone for breakdown recovery. That's when I turned the petrol tap to R, it flooded a carb, tarmac was stained, I thought for a moment it was engine oil. Rocked the bike, rode home on 2 cylinders. Wow was it a different bike when I switched the leads. Rookie mistake left coil to one & two, right coil to three & four. I beat myself up with that mistake.
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