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Smokey rebuilt 350

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royhall:
Thanks for that information. Problem remains that the three pots where the readings are apparently correct smoke, smell of unburnt fuel and are blackening the plugs alarmingly. Those three pots are clearly running super rich, with No.4 being the worst even though it has the best reading? The mechanic at the mot station said he could smell it running rich before he started the test.

A brief history: These carbs came as a refurbished set from Gerben in Holland. They gave trouble immediately and were sent back to Gerben who went through them again. They were better but not right so I sent them to Harper's who stripped and cleaned them and fitted the Cruzinimage kits. They were decent for a while then got smokey. At that point I wrongly diagnosed the smoke as an engine issue due to the carbs having been professionally built three times. Problems were found and rectified on the subsequent strip down, so that at least was not wasted. These carbs have been ultrasonic cleaned at least twice by two people that know what there doing and all new internals fitted.

At this point I'm not sure the emissions readings are helping. It starts from cold without choke or throttle and idles immediately. That is not what Honda's do. It runs okay until the engine get properly warm then it bogs down. It is obvious from the symptoms that it's super rich. I am ready to abandon this set of carbs and find some more. I could really do with borrowing a set just to make certain that it runs well on known good carbs before buying any more. Not sure I can do much more with this set. Today however, I am going to make a fitting to check the actual float/fuel levels with a clear tube. Kevski has given me a measurement to set them to that works on his 350.

I think this is why bikes end up dumped under a cover at the back of the garage. Will report back with what I find.

Laverda Dave:
Good luck with it Roy. So frustrating when you rebuild an engine twice over and the cars three times only to find the same problem persists. I'm sure you'll get there, at least its the carbs and you rectified some engine issues. All is not lost, hope you find some spare carbs to try.

kevski:
Roy, i have my original jets and float needles if you wish to try them in your carbs to see what results you get, they are not worn my bike has only 5 and half k on it. Send me your address if you wish to try them out, my new set came from 4 into 1.

royhall:
Thanks Kev will let you know. Are the new valves in yours genuine or pattern?

Sent from my Nexus 6 using Tapatalk

kevski:
The valves in mine are pattern, i had to lap them in a touch, the ones that i would send to you will be the originals along with the original jets.

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