Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
I was only thinking earlier this evening if anyone has ever fitted 450 style CV carbs to a 350K and lo and behold this pops up on eBay ... a real mish-mash of an example.https://www.ebay.co.uk/itm/386144812818Ben ... did you try checking for inlet leaks with easy start sprayed onto the inlet stubs ... should have let me soften them with my magic fluid (Attachment Link)
Had a day on the 350. Rechecked all the settings - points bob on but timing (using the strobe) altered slightly, fiddled with carb setting and much improved but still intermittently hanging before settling to tickover. When I was building the engine on the bench and when fitting the carb manifolds, I thought the design of using JIS cross head screws and a gasket didn't seem a good design. The last thing I checked today was for air leaks on the carb manifold to head (using the carb cleaner method) and there was a clear movement in the revs when carb cleaner squirted at the joint. Just spent the night stripping and re-assembled using a slight skim of silicon sealant and hexagon bolts.I'll report back tomorrowAs an aside, its taken me back 50 odd years taking the tank off (when I had a 250k) and that bloody awful petrol balance pipe that goes from one side of the tank to the other under the frame - you have to juggle taking the tank off while trying to stop petrol coming out of both sides - its a bludy pain! I have put 2 tiny inline taps on the pipe (and disconnect the pipe in the middle between the taps) but there is so little space, its more trouble than the standard pipe.Coincidence that Ash posted the same thing at the same time!
Started up after actions taken in previous post - revs returning to idle better but still little response to slow running screw adjustment on R/H cylinder (and now no leak on intake manifolds) with misfire (pop) when slow speed screw backed out more than 1/2 turn. Should have checked that curcuit while I had the carbs off! I'll take the carbs off again and check the low speed curcuit for blockages - I'll feed any progress back Ben.Also got a noisy tappit on R/H to sort when engine back to cold and strangely, the R/H silencer is far louder than the L/H (both new).
Is it worth running without air filters attached for a test just so you can see if slides are popping back down in good time and together when throttle is released?
Sounds like we are having identical issues Ben! My slow running jet just wont clear. It's been soaking in carb cleaner for 2 days. I've ordered a .35mm drill. As a back up, I've ordered some pattern jets (as genuine not available) as a back up. Also ordered some pattern floats. Hopefully I'll have your success!