Optic Bliss
Bliss
Hi all,
I have been working on getting my 77’ XS650D in running order, here’s some info for reference:
1977 XS650D
Mikumi BS38 - not well synced
Main Jet:#130
Hugh’s PMA
Fresh Coils
Points Ignition
NGK BPR7ES
A little bit of backstory:
The bike had sat for 10+ years and had collected rust in the tank. The carbs were seized entirely. Once the carbs had been cleaned and rebuilt, it only fired on the right side. The left carb flooded because of a busted float. I replaced it with some ElCheapo float that would let the needle slip loose and cause the carb to flood. To make it work, I had to use a needle that didn’t match the seat. The left side finally ran, then it was driven upwards of 150-200 miles.
The carbs are DEFINITELY dirty, but not dirty to an extent that a jet or the seat could be clogged. After I got to a place I could work on it, I put Kreem in the tank and flushed the carbs about a dozen times to get any rust or scum out. After coating the tank and flushing the carbs, the bike developed a sputter/backfire through the carbs on deceleration. I assumed it was the cheap floats. I swapped them with a float from MIkesXS. After that, I attempted to match a needle and seat set so there would be no possible leaks. I took it for a test drive and it backfired like a gunshot on acceleration instead. I think it may be too much fuel, or maybe I didn’t clean the carbs good enough.
I can no longer tell because the next day, the left side had stopped firing entirely. The plugs are fresh (1 day old) and I tested them for spark. I can smell gas on the threads and electrode, meaning it has to be getting something in terms of fuel. I feel like the 5-6 massive backfires may have filed out one of the points, but I can’t be sure. At this point I'm just pissing in the wind, waiting for my ineptitude to splash back on me. I know there is a problem with the carbs, but could a few backfires file out a point? Or is it just the carbs alone?
I intend to find out by cleaning the carbs, but if anyone has some advice or has had an issue like this and somehow resolved it, please help! SOS! (save our shitbox)
I have been working on getting my 77’ XS650D in running order, here’s some info for reference:
1977 XS650D
Mikumi BS38 - not well synced
Main Jet:#130
Hugh’s PMA
Fresh Coils
Points Ignition
NGK BPR7ES
A little bit of backstory:
The bike had sat for 10+ years and had collected rust in the tank. The carbs were seized entirely. Once the carbs had been cleaned and rebuilt, it only fired on the right side. The left carb flooded because of a busted float. I replaced it with some ElCheapo float that would let the needle slip loose and cause the carb to flood. To make it work, I had to use a needle that didn’t match the seat. The left side finally ran, then it was driven upwards of 150-200 miles.
The carbs are DEFINITELY dirty, but not dirty to an extent that a jet or the seat could be clogged. After I got to a place I could work on it, I put Kreem in the tank and flushed the carbs about a dozen times to get any rust or scum out. After coating the tank and flushing the carbs, the bike developed a sputter/backfire through the carbs on deceleration. I assumed it was the cheap floats. I swapped them with a float from MIkesXS. After that, I attempted to match a needle and seat set so there would be no possible leaks. I took it for a test drive and it backfired like a gunshot on acceleration instead. I think it may be too much fuel, or maybe I didn’t clean the carbs good enough.
I can no longer tell because the next day, the left side had stopped firing entirely. The plugs are fresh (1 day old) and I tested them for spark. I can smell gas on the threads and electrode, meaning it has to be getting something in terms of fuel. I feel like the 5-6 massive backfires may have filed out one of the points, but I can’t be sure. At this point I'm just pissing in the wind, waiting for my ineptitude to splash back on me. I know there is a problem with the carbs, but could a few backfires file out a point? Or is it just the carbs alone?
I intend to find out by cleaning the carbs, but if anyone has some advice or has had an issue like this and somehow resolved it, please help! SOS! (save our shitbox)