Honda305.com Forum

Hi Tim, thanks so much for the excellent link. I've been jetting for decades, and some day this kind of knowledge will definitely be a lost art. I've narrowed it down to the jet (for now), since I already know that the D9 needle is the closest alternative to the CB77's OEM 16151 259 004 needle (#11 ...

Hi— My '62 CB77's carbs are a little tired. I obtained a less-worn set of needle jets from a '65 CL77 and the pulling performance improved a lot. Does anyone have the ID specification for this part? I want to fill and drill my old needle jets (PN 16133 275 004). I remember Fast Fred used to have thi...

120 main and 35 low jet Hi GG, I have a little experience with your symptoms. At 6300' in Santa Fe, my CB77 is running 130 mains, middle (D9) needle slots and 38 slow jets. It is a little lean, mainly due to worn jet needles. As for carburetion changes due to more or less compression (rings), I hav...

Soggy air filters?

I'm at 6300' in Santa Fe, New Mexico. It depends on your air filters and exhaust too. I have big K&N RU-0175 filters and relatively loud EMGO Dunstall replica mufflers. My formerly trashed engine with no compression needed stock #135 main and #42 slow jets; needle at middle slot. On a fresh engine I...

I had K&N RU-0240 filters (3" x 3.5") and the engine felt a bit starved. I actually had to jet down one step to a 130 on my cb77 to get a good mixture and better response as well as noticeably higher revs winding out (it was just going flat at 8k rpm with the 135 jet + short K&N). I put in a set of ...

Installing the correct air filters is the general recommendation I hear a lot here.