koconno2 wrote:
I hope someone is still answering this string. This seems like great information for old bike owners like my self. I have a 81 Honda CX650 with two carbs. I have very little experience with motorcycles and since I have the engine removed from the bike for an alternator R&R I thought I should tune the carbs after the reassembly.
What causes the carbs to become out-of-balance to start with? Are there worn out parts that should be replaced first?
Screws can be vibrated out of their positions, for one thing. Metal can warp, as well.
koconno2 wrote:
Are both ends of the manometer attached to the carbs?
Yes. Each carb gets one end attached to it. This way you can tell which carb's throttle is open more than the other.
koconno2 wrote:
Do you attach the manometer to manifold vacuum or venturi vacuum?
Each carb, or carb intake, should have a nipple or port to hook the gauge in to. Manifold vacuum only measures the total vacuum, it doesn't compare one carb to the other.
koconno2 wrote:
Could I use vacuum gages instead of a manometer?
Yes you can,
if and only if you have shown they are calibrated perfectly. Absolutely laboratory perfect. Otherwise it's going to be worthelss. Dropping the $5 on some ATF and tubing is a much better, more accurate solution.
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