NoIdeaWhatImDoing
CB750 Member
Hello All,
...Its important to state for the record that i am not an experienced motorcycle mechanic...
82 cb750SC NH. Got the bike free from a friend. It sat in his garage for a year-ish. He cleaned up the carbs but didn't rebuild them. When I hauled it to my house, it wasn't running, carbs were off, but bike in reasonably good shape for its age and recent known neglect. Gas tank was too far gone (rusted to holy hell), and unfortunately was discarded.
Known issues and my attempts to correct; (condensed cliffnote version)
-Bought another OEM '82 750SC NH gas tank on ebay. Removed rust from inside. Stripped old paint, which revealed rust pitting in the lower fronts and rear of tank. Still working to resolve. Tank is currently at a shop and i'm awaiting their prognosis
-Oil change
-new plugs
-New battery
- Cleaned carbs thoroughly and installed on bike. Gas leaking out of several places. Brought carbs to local Honda moto dealer to have rebuilt. Got them back, still leaking out of #3
bowl. Took apart and found dried crust (??). Scraped out and cleaned. Re-installed. No more leak. Still not at all sure about correct vacc tube connections.
-Eventually got it started, and was rideable. Sounded okay, although I have little mental basis of comparison. Starting the bike was and remains difficult. I mean cranking and cranking and cranking and resting resting and resting then cranking again for a couple minutes. With varying degrees of choke. Have to stay close to the throttle for the first few mins to regulate the idle. Once warmed up it stabilized and idled on its own. Now there were days when it would start and quickly stabilize on its own and seem ok, and other days it just wouldn't cooperate, not start, or run very rough and stall. Keying engine off, then restarting again soon after or while still at temp, it starts right up. But only at OT. Cold starting is always very ugly. Usually a day or two would elapse between starting.
My outlook going forward;
The bike has now been sitting about two months with gas in the carbs. I dont have much faith in the shop that rebuilt the carbs. I don't yet have a permanent fuel tank solution. In
a perfect world Id have the space and the time to methodically disassemble, check, clean, replace every last piece of the bike. It would take me over a year to do that, especially since id be learning while doing. I want the bike ready for this coming season (Im in New York). So i'm considering bringing it to a shop...against every fiber of my being. Ask them to fix all issues mentioned above, and give the rest of the old gal a once-over. Even though i'm quite scared of how much this will cost, its seeming like my best option. I'd be very interested to hear the opinions/experiences/harsh truths of the CB750 community.
I'm just winging it here buds...I thank everyone for taking the time to read this erratic and poorly thought-out description : )
...Its important to state for the record that i am not an experienced motorcycle mechanic...
82 cb750SC NH. Got the bike free from a friend. It sat in his garage for a year-ish. He cleaned up the carbs but didn't rebuild them. When I hauled it to my house, it wasn't running, carbs were off, but bike in reasonably good shape for its age and recent known neglect. Gas tank was too far gone (rusted to holy hell), and unfortunately was discarded.
Known issues and my attempts to correct; (condensed cliffnote version)
-Bought another OEM '82 750SC NH gas tank on ebay. Removed rust from inside. Stripped old paint, which revealed rust pitting in the lower fronts and rear of tank. Still working to resolve. Tank is currently at a shop and i'm awaiting their prognosis
-Oil change
-new plugs
-New battery
- Cleaned carbs thoroughly and installed on bike. Gas leaking out of several places. Brought carbs to local Honda moto dealer to have rebuilt. Got them back, still leaking out of #3
bowl. Took apart and found dried crust (??). Scraped out and cleaned. Re-installed. No more leak. Still not at all sure about correct vacc tube connections.
-Eventually got it started, and was rideable. Sounded okay, although I have little mental basis of comparison. Starting the bike was and remains difficult. I mean cranking and cranking and cranking and resting resting and resting then cranking again for a couple minutes. With varying degrees of choke. Have to stay close to the throttle for the first few mins to regulate the idle. Once warmed up it stabilized and idled on its own. Now there were days when it would start and quickly stabilize on its own and seem ok, and other days it just wouldn't cooperate, not start, or run very rough and stall. Keying engine off, then restarting again soon after or while still at temp, it starts right up. But only at OT. Cold starting is always very ugly. Usually a day or two would elapse between starting.
My outlook going forward;
The bike has now been sitting about two months with gas in the carbs. I dont have much faith in the shop that rebuilt the carbs. I don't yet have a permanent fuel tank solution. In
a perfect world Id have the space and the time to methodically disassemble, check, clean, replace every last piece of the bike. It would take me over a year to do that, especially since id be learning while doing. I want the bike ready for this coming season (Im in New York). So i'm considering bringing it to a shop...against every fiber of my being. Ask them to fix all issues mentioned above, and give the rest of the old gal a once-over. Even though i'm quite scared of how much this will cost, its seeming like my best option. I'd be very interested to hear the opinions/experiences/harsh truths of the CB750 community.
I'm just winging it here buds...I thank everyone for taking the time to read this erratic and poorly thought-out description : )
