Hey guys, Ive had my cb750f for about a year now and loving it besides some of the issues that have arisen over the last 6 months. Below I have some pictures of some of the work I have done so far including the tail section and getting rid of some unnecessary parts. Other than progress on the build I thought I would pick your brains and give you guys some history on the issues with the bike and hopefully you guys can enlighten me on some of the issues I may be having.
Issue #1. I was doing valve clearances and somehow I did not tighten one of them properly and it came off during a ride. I heard a ticking noise all of a sudden when I took off from a corner. So I tried to fish it out but tilting the valve cover and fettling with a magnet, but no dice. So i had to remove the engine as you can see below. Bad news is that when I tilted the valve cover initially the stray nut fell into one of the spark plug holes. ( the spark plug was in thankfully but once I pulled the motor I noticed it just sitting there. Needless to say I was a little pissed lol.
However I re-tighted the valve nut, re-set the clearances and dropped the engine back in the bike.
Issue 2) after re-installing the motor it wouldn't turn over. figured something was binding because you couldn't kick it over and the battery was dead in about 5 turnovers and it seemed bogged down. Eventually it loosened up but ever since it has had a pretty loud knocking noise. Took it to a mechanic and he said not to worry about it and sometimes these old bikes do that. I am thinking that I left a paper towel in possibly the exhaust port or the intake side of the engine.
stupid me. Either way that issue I believe went away other than the knocking noise.
Issue 3) The bike requires be to have choke on, And turn the throttle to get it to spark up. I will turn the bike over and give it a couple twists of the throttle. Twisting the throttle actually makes it worse but it delays a second after I twist the throttle and then it spits a little. Eventually it sparks up and runs but I have to constantly be on the thottle a little to prevent the idle from dropping off until it dies. Same thing happens when riding. At a stop light I have to keep a tiny bit on the throttle. Once it is warmed up however I know longer need to use the throttle to start it up. I kind of just ignored this issue and just constantly fittled with the throttle until this other issue (#4) popped up. The bike starting popping fuses. And the signals stopped working on the right side of the bike> every time i get close to finding it it just starts working again. Then before winter every time I drove my bike somewhere it was fine other than the start up and idle issues I mentioned before. But when I went to go home it would start to cut in and out when on steady throttle. If I sped up and raised the RPMs however is stopped but as soon as I slowed down again it started cutting in and out. Eventually until I had to slow down completely due to loss of power and the bike would just shut off. Every time however I was able to limp it home eventually and sometimes it would just spark up and not even do it for the rest of the way. I am very frustrated with this issue and my knowledge of motorcycles is limited compared to many of yours. Any incite is greatly appreciated as I would love my bike to be able to run for spring time. Thanks everyone I appreciate everything immensely.
