OK, I'm doing this as a favour to catboy, who has no internet at home.
His new cb750f (1976) seems to be having a rich condition. Had trouble starting it, and when we changed the plugs, they were very dark & sooty, or dark & wet, on the 2 cylinders that weren't firing. New plugs solved the problem, but of course, that's only treating the symptom. So, he checked the air filter, and it was apparently completely plugged up & black & oily. However, the same richness issue is still occurring, running without any filter at all. Jetting issue, I assume. Since they're not cb350 cv carbs carbs, I know very little about them, but I assume we want to adjust the needle jet? He has a Clymer manual, which came with the bike, but it apparently doesn't tell him much about tuning. I know I'm breaking the rules by not searching, but as I said he has no internet & I'll be damned if I'm going to spend my day off looking for info about his bike.
Any quick help would be appreciated, since we were planning to get in a ride tomorrow (unless we can fix this, it looks like he will be borrowing on Baby Sister - again).
His new cb750f (1976) seems to be having a rich condition. Had trouble starting it, and when we changed the plugs, they were very dark & sooty, or dark & wet, on the 2 cylinders that weren't firing. New plugs solved the problem, but of course, that's only treating the symptom. So, he checked the air filter, and it was apparently completely plugged up & black & oily. However, the same richness issue is still occurring, running without any filter at all. Jetting issue, I assume. Since they're not cb350 cv carbs carbs, I know very little about them, but I assume we want to adjust the needle jet? He has a Clymer manual, which came with the bike, but it apparently doesn't tell him much about tuning. I know I'm breaking the rules by not searching, but as I said he has no internet & I'll be damned if I'm going to spend my day off looking for info about his bike.
Any quick help would be appreciated, since we were planning to get in a ride tomorrow (unless we can fix this, it looks like he will be borrowing on Baby Sister - again).