SOHC.co.uk Forums > CB750
Head Bolts
Martin6:
78 miles. Ran almost faultlessly, after I tightened the rocker caps! No other oil leaks. The bike is definitely punchier and the suspension feels good, much better at absorbing bumps and no bottoming out. Perhaps a little underdamped at the front, but I'm not complaining. It was a very enjoyable ride.
A friend saw no smoke, except at one point when I opened up to accelerate hard, producing a whiff of black smoke. Running rich maybe?
Couple of questions:
I've a slight hesitation applying the throttle from tickover and a bigger hesitation if I rapidly whack the throttle on whilst riding (c.3500rpm). It's fine if I just roll the throttle on in a more measured way. Are these symptoms of running too rich?
I seem to have a wandering oil level on the dipstick. Was at 80% when I started out. Was just above the minimum 40 miles later, then at 75% when I got home. All readings were taken on the centre stand,.on level ground. Oil return looks consistent when I check in the tank. For the last of the readings, I put it on the sidestand before lifting it onto the centre stand. Can't see how that would affect the tank level though? In your experience, is this odd, or usual behaviour?
Minor observations:
I'm not convinced the tacho is calibrated correctly. 1400rpm sounds and feels like a nice gentle tickover. Below that just feels too slow. I'm yet to do a running carb balance though. The speedo is definitely reading fast by more than I'm used to. I'd say indicated 60mph is really a tad over 50mph. A local radar speed awareness sign shows 30mph when I have 36 on the speedo! I'll live with that.
Thank you for encouraging me to give the rebuild a go. I have a huge sense of achievement and feel like this is now my Honda CB750, my 'pride & joy'! The manuals (Haynes and Honda) were good start points, but a bit tricky on model variations over the years. Most problems I stumbled into were solved without too much drama, via searches here and on SOHC4 forum. Only a little blood was shed in the process!
I'm looking forward to next year with my bike, although with my fingers crossed for now.
👍 Best,
Martin.
McCabe-Thiele (Ted):
Well done getting a run out before Christmas - sorry can't help you on 750 oil levels my bikes are standard wet sumps.
Johnny4428:
Great news Martin! So impressed you managed out this time of year for a “shakedown†run. Wouldn’t be too concerned about the oil level, I’ve had that on my 750, after all the engine is where you want the oil to be not the tank. Well not all of it anyway. Bit of syncing and tuning to do by the sounds of it but plenty of winter ahead yet!🥶
Martin6:
--- Quote from: Johnny4428 on December 16, 2023, 09:58:03 AM ---Great news Martin! So impressed you managed out this time of year for a “shakedown†run. Wouldn’t be too concerned about the oil level, I’ve had that on my 750, after all the engine is where you want the oil to be not the tank. Well not all of it anyway. Bit of syncing and tuning to do by the sounds of it but plenty of winter ahead yet!🥶
--- End quote ---
I'd guess it's a little bit warmer and a lot dryer down here! I'm able to pick my days and ride all year with a few mates. Bacon and eggs are a great winter warmer! Although, some of the winter runs, I stick to a modern bike with a big enough alternator for a heated jacket.
I was out again today, warmed the engine through and up to nearly 100 miles, so I could change the oil. I'm really pleased, it was lovely and clean and I dissected the filter, which was also clean. I'd also unwound the air screw on carb no.1 by 1/8th of a turn. Initial impressions are it is better, but forgot to check the plug before restarting the bike to check new oil level. Still so far, so good :) 👍
Oddjob:
Dissected the oil filter? Respect there Martin, not many would go to those extremes.
I ran with some really powerful magnets on the outside of my cannister filter, on my CB1300, around 6-8 IIRC, the idea was that any metal would stick to the outside of the cannister due to the magnets, when I removed the cannister I cut the housing in half so I could see if there was anything there, there wasn't. Saying that, alloy would not be attracted but you can't win all the time.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version