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Here's the deal: Up to right around 1/4 throttle engine responds beautifully. 1/4 - 3/4ish throttle she bogs and it sounds like it's just sucking air. If, however, I crack the throttle past the 3/4ish mark she lights right back up and takes off. Additionally, one I crack it past that 3/4 mark I...

Bike is 74 CB750 w/ Keihin 657A carbs. I've looked around about where to measure float height on the carb body, and found you measure from the lip, not inside where the bowl gasket sits. Just took my carbs out to adjust float height after making my gauge and am looking for a bit of...

Tore apart my carbs again, found I'm running 118 mains, along with 42 slows and needle at 1 up from bottom. That being said, I've got a 4-1 exhaust and velocity stacks, but also have pods if need be. Where it's at right now, I can't rev past 4000 without it going chh chh chh and dying when...

I've looked around on here and the SOHC4 forum a bit and found a few tutorials, mostly text, on how to replace a spark plug wire on a sealed coil. My bike is a '74 CB750 which has these sealed coils. I figured I might as well post how I'm trying to fix my situation so here goes. The three...

So my '74 CB750 is nearly done. It starts and idles, but sometimes it'll have fits when I give it some revs. The first time I rode it after rebuild it ran fine, however my mid-range was nonexistent. From maybe 1/4 throttle to a little past 1/2 it would bog, but anywhere past the 1/2 throttle it...

I have to buy at least one new piston, probably two, but debating on four. Are pistons something you should replace all of if you're getting new ones or is it okay to just replace a couple?

Does anyone know where to buy valve collets for a '74 CB750? I've only been able to find suppliers from China that make you buy at least 10,000.....

I'm going to be painting my engine soon but I saw on a forum that someone painted their engine using the high temp. engine paint and it caused their engine to overheat because the paint acted as an insulator. Has anyone else heard of this? That's the first time I've heard of that so I'm just...

Well I picked up my '75 CB750 yesterday ;D It's definitely going to need a top end rebuild, which I was planning on doing anyways. A couple of questions though: what type of oil should I be filling the tank with, and are all 750 clutch levers pretty hard to squeeze? I've ridden it less than 20...

Well I finally have enough money saved to buy a bike for a cafe project so I figured I'd better start hitting the forums. So, first thing's first, what size bike would those of you who have built/ridden a cafe racer suggest? I know I'd like to get a Honda CB, but as for size I'm at a loss. 450...