Hi Folks, I was wondering if the hi-frequency tingle I was feeling in my brake lever (causing numbness after an hour or so) could be caused by out of sync carbs. The bike is a 95 that I got with only 12K miles on the clock. So it had sat around a lot. I ran some doses of Sea Foam through it and it seemed to help. So I decided to check the carb sync. This is on a '95 VFR750. I did the sync on Saturday and after riding around for a couple days, I can say the carb sync made a vast improvement. One carb was way off. About two inches below the others on my manometer (an old Motion Pro that uses mercury in the tubes). I got the columns dead level at idle. The tingle in the brake lever is greatly reduced, but that is really not the best part. The bike starts much easier, and warms up quicker. Idle is smoother and low-speed running is much better! Before if I was running in slow speed traffic it was very hard to be smooth, almost as if my chain had tight/ loose spots, which wasn’t the case. It was very jerky. Now it’s smooth. I was able to lower my idle speed as well. I wish I had done it sooner. I’m going to get another can of Sea Foam and run it through and check the sync again in a couple months. I only had one carb that was way off, but it made a lot of difference. So if you're having trouble with the bike being hard to ride smoothly at low speed, your carbs may be out of sync. Apparently it doesn't take much. Cheers! Craig :smile:
Your post is getting me motivated. :smile: I was looking around for information. Looks like a homemade manometer is not too difficult although the ones I have seen allow the fluid to be sucked into the engine if you are not careful. If 4 reservoirs are put in line before connection to the engine, they can receive any fluid and prevent it from flowing into the engine. Small plastic jars or something like that, as long as they don't leak and are large enough to take all the fluid. I was looking at my engine, a 2nd gen. I see two ports just under the carbs pointing down on the rear head, and sideways on the front head, on what would be the manifolds if there were any manifolds. A couple of mine are hooked up to the california emissions equipment; I hope pulling them off won't make the engine run bad. Or maybe I should plug the hoses pulled off? The others need fittings as they are just drilled and tapped holes. I suppose I can find them from the parts suppliers? I can see a couple of adjustment screws from underneath, but the manual is not helpful about this. How many screws are there, and where are they? I read somewhere that carbs should be synced to #4 (right front?). Seems like it would make sense to connect 4 short hoses to the manifold fittings and plug them until the next time I sync...
