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This will be a little lengthy, but without the details, i don't think i can get good advice. Here we go!
It has been almost four weeks since i have been able to ride. I was on a trip with a few friends, and found my mileage had dropped to 35 miles per gallon. I was running the same as i always do, so no difference there. One friend said it smelled a little rich. I also could not go over 80 MPH. It has not been able to go over 7000 RPM's for three years. It would act like it was running out of fuel. When i returned home, the first thing i done was change the coils and wires to the vfr coils. It did help a slight bit. I check the valve clearances again, and they were ok. I took the carbs off for rebuild. Ordered Kl kits from George Fix, and proceeded to clean the carbs. I did not want to soak, as they are black, and did not want to repaint. I intentionaly checked every passageway with carb cleaner twice, and with air. I found the passages blocked, one in the bowl, and the other two were partials in the pilot jet circuit. I checked jet sizes against the new ones, they were the same. Assembled the carbs with floats set at 23MM. Bench set the synch, and installed. The bike ran strong off idle, and would run easily up to and over red line, but the idle was horrible. I could not get more than 5 inches of vacuum anywhere on all carbs. I then took a cold compression check with the throttle wide open, and had 130 lbs across all four. I checked for vacuum leaks with carb cleaner, and again with propane, and found none. I decided to get new carb holders, to eliminate that possibility. After re-installing everything, I took it to a friend that has a motorcycle repair shop, and works on old bikes. We put the gauges on it, and could not get it to synch. We pulled the carbs again, and checked all passages, and levels. We wet set the floats, and bench synched. Re- installed the carbs, and checked the wet set on the bike. We then started adjusting, and synching. We finally got it all balanced out with great throttle response. It still would only pull 10 inches of vacuum. I took it for a ride, and went home. The ride was only 10 miles, and top speed was 80 MPH on the freeway. When exiting the freeway to the stop, the bike died. It started right back up, and i continued. At the next stop, it died again. I got home, and let it sit a minute, and tried to start it hot with no throttle, and it wouldn't. I waited 15 minutes and tried again with no luck. I decided to give it an hour and try. When i came back out i had fuel running out the airbox. Never had that problem before. I pulled the plugs, and cranked it. No.1 blew out a lot of fuel. The next morning i pulled the airbox off, and turned on the petcocks, only to find three carbs were flooding. Removed the carbs, and reset the floats my way with my calipers. Looked things over, drained my oil and took filter off. After re-installing the carbs, i turned the petcocks on to check for flooding. There was none, so i left the petcocks on for an hour to check it again, still no flooding. I reassembled everything, put new filter and oil in, and fired it. After adjusting the idle, i got ready for a test ride. The mixture screws are set at 1 1/2 turns out, and i didn't touch our sych settings, as they were good from before, and didn't really think they would have changed. Went for a fifteen mile run, and all seemed fine except for the idle. When i got home, i tried to start it hot, and it would not start without a little throttle. (this is how it has always been) Let it sit for 15 minutes and tried again, same thing. Let it cool down about 4 hours and tried to start it with the same result. After sitting overnight, i went to start it, and found that i could not use the enrichment circuit to start. Had to start with just the throttle. Idle is still irregular, and it refuses to start without a little throttle. I am going to ride it a bit today, and Thursday is supposed to be nice out, so i will make about a 4 hour run, and see what it does, and check the mileage. I don't know what else to say except that i could live with it, but it just isn't right. IDEAS!!
It has been almost four weeks since i have been able to ride. I was on a trip with a few friends, and found my mileage had dropped to 35 miles per gallon. I was running the same as i always do, so no difference there. One friend said it smelled a little rich. I also could not go over 80 MPH. It has not been able to go over 7000 RPM's for three years. It would act like it was running out of fuel. When i returned home, the first thing i done was change the coils and wires to the vfr coils. It did help a slight bit. I check the valve clearances again, and they were ok. I took the carbs off for rebuild. Ordered Kl kits from George Fix, and proceeded to clean the carbs. I did not want to soak, as they are black, and did not want to repaint. I intentionaly checked every passageway with carb cleaner twice, and with air. I found the passages blocked, one in the bowl, and the other two were partials in the pilot jet circuit. I checked jet sizes against the new ones, they were the same. Assembled the carbs with floats set at 23MM. Bench set the synch, and installed. The bike ran strong off idle, and would run easily up to and over red line, but the idle was horrible. I could not get more than 5 inches of vacuum anywhere on all carbs. I then took a cold compression check with the throttle wide open, and had 130 lbs across all four. I checked for vacuum leaks with carb cleaner, and again with propane, and found none. I decided to get new carb holders, to eliminate that possibility. After re-installing everything, I took it to a friend that has a motorcycle repair shop, and works on old bikes. We put the gauges on it, and could not get it to synch. We pulled the carbs again, and checked all passages, and levels. We wet set the floats, and bench synched. Re- installed the carbs, and checked the wet set on the bike. We then started adjusting, and synching. We finally got it all balanced out with great throttle response. It still would only pull 10 inches of vacuum. I took it for a ride, and went home. The ride was only 10 miles, and top speed was 80 MPH on the freeway. When exiting the freeway to the stop, the bike died. It started right back up, and i continued. At the next stop, it died again. I got home, and let it sit a minute, and tried to start it hot with no throttle, and it wouldn't. I waited 15 minutes and tried again with no luck. I decided to give it an hour and try. When i came back out i had fuel running out the airbox. Never had that problem before. I pulled the plugs, and cranked it. No.1 blew out a lot of fuel. The next morning i pulled the airbox off, and turned on the petcocks, only to find three carbs were flooding. Removed the carbs, and reset the floats my way with my calipers. Looked things over, drained my oil and took filter off. After re-installing the carbs, i turned the petcocks on to check for flooding. There was none, so i left the petcocks on for an hour to check it again, still no flooding. I reassembled everything, put new filter and oil in, and fired it. After adjusting the idle, i got ready for a test ride. The mixture screws are set at 1 1/2 turns out, and i didn't touch our sych settings, as they were good from before, and didn't really think they would have changed. Went for a fifteen mile run, and all seemed fine except for the idle. When i got home, i tried to start it hot, and it would not start without a little throttle. (this is how it has always been) Let it sit for 15 minutes and tried again, same thing. Let it cool down about 4 hours and tried to start it with the same result. After sitting overnight, i went to start it, and found that i could not use the enrichment circuit to start. Had to start with just the throttle. Idle is still irregular, and it refuses to start without a little throttle. I am going to ride it a bit today, and Thursday is supposed to be nice out, so i will make about a 4 hour run, and see what it does, and check the mileage. I don't know what else to say except that i could live with it, but it just isn't right. IDEAS!!
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