SOHC.co.uk Forums > SOHC Singles & Twins
CB350 1971 Restoration Project
philward:
Had a go at settings on mine yesterday too Ben. Running awful really. Similar issues to yours. Balanced the carbs but slow to return to idle. Got good compression at 160 on both cylinders. Going to recheck all settings, check for inlet leaks.
I'll report back too if any progress
Sent from my moto g(50) using Tapatalk
BenPowell:
--- Quote from: philward on September 26, 2023, 08:34:33 AM ---Had a go at settings on mine yesterday too Ben. Running awful really. Similar issues to yours. Balanced the carbs but slow to return to idle. Got good compression at 160 on both cylinders. Going to recheck all settings, check for inlet leaks.
I'll report back too if any progress
Sent from my moto g(50) using Tapatalk
--- End quote ---
Mine sometimes hangs at around 3/4K rpm. Only occasionally though, most times it returns to idle quickly, but a quick blip of the throttle returns it back to idle, sticking slide maybe?
Frustrating thing is I would have liked to work on the carbs this week but with the inspection on Friday it’s probably best to leave the bike fairly complete. I’ll have most of the weekend to work on them and try making changes, I will try to make one or two changes at a time to narrow down the issue.
I will investigate for air leaks probably Wednesday/Thursday since I can do that with the bike together. And also run it to see if the timing/valve adjustment has had any effect.
Bu yeah please keep updating, no doubt we won’t be the first or last to have these issues, on other forums posts aren’t followed up with results so become a bit difficult to pin point potential problem areas.
AshimotoK0:
--- Quote from: BenPowell on September 26, 2023, 09:30:02 AM ---
--- Quote from: philward on September 26, 2023, 08:34:33 AM ---Had a go at settings on mine yesterday too Ben. Running awful really. Similar issues to yours. Balanced the carbs but slow to return to idle. Got good compression at 160 on both cylinders. Going to recheck all settings, check for inlet leaks.
I'll report back too if any progress
Sent from my moto g(50) using Tapatalk
--- End quote ---
Mine sometimes hangs at around 3/4K rpm. Only occasionally though, most times it returns to idle quickly, but a quick blip of the throttle returns it back to idle, sticking slide maybe?
Frustrating thing is I would have liked to work on the carbs this week but with the inspection on Friday it’s probably best to leave the bike fairly complete. I’ll have most of the weekend to work on them and try making changes, I will try to make one or two changes at a time to narrow down the issue.
I will investigate for air leaks probably Wednesday/Thursday since I can do that with the bike together. And also run it to see if the timing/valve adjustment has had any effect.
Bu yeah please keep updating, no doubt we won’t be the first or last to have these issues, on other forums posts aren’t followed up with results so become a bit difficult to pin point potential problem areas.
--- End quote ---
Don't think they will be bothered about carbs being off Ben. More a visit to check validity of numbers on frame & engine.
Can always loan you some 350 carbs to try to identify the problem
Bryanj:
Carb diaphragms maybe, was one on here a while ago with that problem, ds does pattern ones when in stock but aint cheap
Oddjob:
Any of say the earlier versions that don't use CV carbs, maybe swap them for Non CV carbs?
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