Recent content by nateweisiger02

All carbs were matched to number two not too long ago. Should I bench sync, then see how off the other carbs are from number two, or if they are all affected the same?

Alright, readjusted the clearances and now they are all set. Compression didn't change, Still I'm with you, my gauge is wrong so I will get another and retest to see what the actual psi is. I would like to add, started the bike up and it was idling pretty funny and sounded like it was misfiring...

Okay I will do that, then give an update. Thank you!

So what should be my next approach from here? Adjust the valve clearance to make up for the valve face being beat and see how it responds?

Word, I didn’t think to cut the valve seats when doing the rebuild. And yep throttle was wide open while cranking.

Dirt digger, thank you very much for your response! The cylinders have been honed, but you nailed it right on the head. I put brand new valves in the old seats without lapping or cutting them across all four cylinders. I did do a leak test though, and nothing seaped through. But I guess all it...

Update: Just poured a little oil in the spark plug holes, and retested the compression. Nothing has changed, still within 5 psi of what they were before across the board

Now I’m planning on replacing the rings again, as well as new gaskets for the whole engine

I just replaced the valves, gaskets, and rings about two months ago. Thinking the rings are burnt from having no back pressure. But other people have driven around with a chopped exhaust, so I’m not sure why mine is so different.

Hmm possibly. I could drive it around when I first chopped it, then it slowly dwindled down to now it’s having a hard time pulling it’s own weight. Compression is at 80,85,90, and 70.

Hey there, I have a 1978 CB750k. I had the stock exhaust on mine but had a rust hole in it, so I chopped it right below the foot peg…. Bad idea and wish I never had. Haven’t ridden it much at all, barely had any torque after that, now the bike will barely pull its own weight. Thinking I burnt...

Awesome, thank you very much!!!

Update: The two prongs at the points, one for condenser, and one to coil, were mixed up.

After taking my 1978 cb750k carbs apart for a rebuild, taking plenty of pictures and videos, I put it all back together and now my choke is not engaging to close the butterfly valves. I did it just as I took videos of, so I know the springs are in the right position. The cable is moving and...

Alright guys, I’m totally new to the carbs on these. I have just left them stock for as long as I have had the bike, just did a deep cleaning and new gaskets. I have done a ton of reading, however I have not found much on the screw with a question mark. Pretty sure the a/f mixture screw is on...