Cool bananas, Hill!
I spite of all the posts within the Carburation - Fuel forum, many here miss the fact that the slides can be inadvertently reversed and, as a result, over-rich running & plug fouling prevails.
No dis', mate.
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Tell me if you think this would cause my problems ....
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hillhudson
- honda305.com Member
- Posts: 280
- Joined: Tue Feb 15, 2011 9:19 pm
- Location: Portland oregon
You raise a really good point. Most of us pull one carb apart and clean it and reassemble and then do the other one.
I learned a few years ago to use a different technique. I grab two small baking trays and place a sheet of new shop towel in it. Then I write a big L in one and R on the other. I strip one carb into one tray and the other carb into the other tray. I'll even scratch/etch/mark with a sharpie/texta each carb body if I'm not 100% sure I'll remember which is which and if that matters.
When I clean the carb bodies, I blow through one passageway on one carb and compare it to the other. That way I know if there are differences. None of us knows exactly what flow rates each drilling is designed for, but we can compare one to the other and see/feel any differences.
As I clean the parts I tend to write down what I find for each side and that's where I spot differences. I also inspect each part to see if they look the same. For needles, I simply put a digital caliper on one needle close to teh top of teh taper and then I place the other needles beside it between the caliper tynes and see if it drops through further or stands up higher.
If the differences are noticeable I'll try to find a new part to compare them to.
For needle jets, I simply place the root of the needle in there and see/feel for play. Typically there's a tiny amount of gap. Then place that same needle into the other needle jet and see/feel for any perceptible difference. If that gap is larger than I expect, again I'll dig out another carb from somewhere to compare it to.
Needle jets are easy to check and replace, and used to be available from Honda, so I always kept new ones in stock.
If/when you have carb problems, I suggest the strip-clean-compare technique and take notes. Input them into a spreadsheet or Word file so you can refer back to them later. Years ago I knew everything there was to know about carbs, now I realize how much I don't know.
I learned a few years ago to use a different technique. I grab two small baking trays and place a sheet of new shop towel in it. Then I write a big L in one and R on the other. I strip one carb into one tray and the other carb into the other tray. I'll even scratch/etch/mark with a sharpie/texta each carb body if I'm not 100% sure I'll remember which is which and if that matters.
When I clean the carb bodies, I blow through one passageway on one carb and compare it to the other. That way I know if there are differences. None of us knows exactly what flow rates each drilling is designed for, but we can compare one to the other and see/feel any differences.
As I clean the parts I tend to write down what I find for each side and that's where I spot differences. I also inspect each part to see if they look the same. For needles, I simply put a digital caliper on one needle close to teh top of teh taper and then I place the other needles beside it between the caliper tynes and see if it drops through further or stands up higher.
If the differences are noticeable I'll try to find a new part to compare them to.
For needle jets, I simply place the root of the needle in there and see/feel for play. Typically there's a tiny amount of gap. Then place that same needle into the other needle jet and see/feel for any perceptible difference. If that gap is larger than I expect, again I'll dig out another carb from somewhere to compare it to.
Needle jets are easy to check and replace, and used to be available from Honda, so I always kept new ones in stock.
If/when you have carb problems, I suggest the strip-clean-compare technique and take notes. Input them into a spreadsheet or Word file so you can refer back to them later. Years ago I knew everything there was to know about carbs, now I realize how much I don't know.
Good point, ..........sometimes you don't even know what is suppposed to be open unless you have a known carb to compare.teazer wrote:.
When I clean the carb bodies, I blow through one passageway on one carb and compare it to the other. That way I know if there are differences. None of us knows exactly what flow rates each drilling is designed for, but we can compare one to the other and see/feel any differences.
.
I ended up using a hand pump garden sprayer to shoot water under pressure thru the passages.
It lets you see what is open, and how open comparing one carb to another.
Then blow dry
66 dream, 78 cb750k, 02fz1, 09 wing