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  1. Q

    Dark exhaust

    Have my 74cb750 bored out to 811, right now I have 110 jets in the carb and getting dark exhaust. It's not every dark but certainly noticeable. The motor is bored out to 811, because of the Pistons I had to have a thicker head gasket made its .070mm thick, with pods and 4 into 1 exhaust. Too...
  2. Q

    Cb750 fresh build dark oil

    The only thing I've done since the rebuild is turn the bike over and let it idle the bike has yet to be ridden and this is what the oil is looking like. It's bored out to 811, It doesn't smell like fuel has and doesn't seem metallic at all. Is this normal and I'm over thinking running penzoil...
  3. Q

    Cb750 oil from stator bolt

    I'm having a small amount of oil leak from the top bolt of the stator cover. Its not much but I'm confused what bad seal could be causing the leak? Sent from my SM-G935V using Tapatalk
  4. Q

    Acewell tach wrong

    Wired my acewell speedo up to my coil today like the instructions say. Instead of wrapping the wire around the spark plug wire, I wired it directly to the coil as is one of the options. But I'm getting what I think a tach reading of what is double my actual rpms. The acewell reads ~4000rpm while...
  5. Q

    Dynatek timing help

    Trying to time the new dynatek ignition on my cb750 k4 statically. I followed the directions perfectly but I'm still having it fire before the advancer is fully advanced. I can't move the plate any further to retard the timing and I don't want to start messing with the actual pick ups too much...
  6. Q

    Vin plate damaged

    The shop that did my powder coating didn't drill out the rivets to the vin plate when they removed it and ended up tearing both holes open. I can have it put back on using both rivets and an adhesive on the back but it's still pretty badly damaged. Does anyone know if I'll be able to get a vin...
  7. Q

    Cb750 wheels identification

    When I bought my 750k4 a few years back the seller threw in an extra set of rims that are in good condition. I'm getting to the point where I'm either going to sell them or rebuild them. I believe he said they came of a 750A but I can't be sure of that. Can anyone help id them and if they are...
  8. Q

    Dynatek coils 5 v 3

    About to purchase the dynatek ignition system and coils. Just wanted to know what difference if any would I see with the 3ohm coils compared to the 5ohm coils. The bike is 1974 cb750 bored bored out to 811cc. I'm seeing a few different packages for around $260 that come with the 3ohm coils for...
  9. Q

    Sound advice please!

    I know you guys hate trying to deduce engine problems from a video but I'm desperate before I keep having this thing run and possibly damage something. It's a 1974 cb750 first time starting on a top end rebuild, bored it to 811 replaced cams, valves, springs, rockers and bench synched. I know...
  10. Q

    Key in ignition position turns bike off?

    Just tried starting my bike for the first time since the rebuild started but for some reason on the first click of the key the lights and gauge comes on (accessories position) the bike will crank but won't spark. When I turn the key to the second position which is ignition, everything goes off...
  11. Q

    Cb750 front brake without hardline?

    Is it okay to run the front brake without the hardline, in looking to purchase a stainless steel brake line and have it run directly into the caliper if possible. Reason being is because I swapped the brake from the front of the girl to the rear so the stock hardline won't work and I'll have to...
  12. Q

    Motogpwerks exhaust

    Putting the motogpwerks exhaust on my cb750. Do I still use copper crush gaskets, or any gaskets at all with this system? I imagine I need gaskets were the headers meet the head but the copper crush ones I have don't allow the flanges to meet the head. It's creating too much distance. Please...
  13. Q

    Cb750 rear set brake side help

    Purchased a set of dcc fully indexable rear sets. Won't be having any problems matching it up to the gear side but can't figure out how to run the rear brake. I've seen a few photos, some guys run the linkage to the original brake lever spot then have the brake rod go back to the rear brake...
  14. Q

    Cb750 k4 rear wheel spacer

    Looking for the spacer that goes inside the hub on the sprocket side. I have the spacer from a 750a hub but it's too big. Need one that will fit in the k4, can't find anything online. Sent from my SM-G900V using Tapatalk
  15. Q

    What did I do wrong?

    I bought aftermarket shocks for my 74 cb750 after putting them on and using the nut that came off the bike with the original shocks it seems like there's way too much thread where the eye mounts to the bike, I know of course I can get a different nut to make up the space, but it just looks like...
  16. Q

    Cb750a wheels on a K?

    I have an extra set of wheels off a 750A that I got from the seller of my bike, I measured them up to the the wheels that cane off my k4 and the dimensions are pretty close, will they fit onto the k4 without changing anything or am i missing something? Sent from my SM-G900V using Tapatalk
  17. Q

    Wrap around fork indicators?

    Looking for some wrap around fork indicators to keep the front of the bike looking clean but seems every nice one I'm finding is 150$ or up which deems a bit much for indicators. Has anyone ran the wrap around ones, if so which ones and how do they hold up? Sent from my SM-G900V using Tapatalk
  18. Q

    Looking for compact hand controls

    I've been looking for compact switches for my clip on but haven't been happy with what I've been seeing. I'm trying to keep the front minimalistic and everything I've been seeing looks big and out of place on the bars. At the moment I'm thinking of wiring up a push button starter out of sight...
  19. Q

    Cb750k4 wiring

    I'm trying to work with an existing jap harness I purchased awhile ago got my bike, I'm trying to go thru it and get rid of a bunch of things that I'm not keeping in the bike, when I unwrapped the harness I noticed the blue/white wire for the right front signal and orange/white wire for the left...
  20. Q

    Cb750 engine mount spacer?

    Is this the proper spacer for the lower rear engine mount on the cb750k4? If so I can either order this one or if someone has the length of the spacer I may have something else in the garage...
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