Another "what have I got" question
Well, I got her running! Turns out the spark problem just needed a little more love, (points file vs. 400 grit sand paper), and she fires with the original points, condenser, and coil. I met Bill Silvers the other night, fortunately he is nearby. He went out of his way to find a set of points for me, which I didn't end up needing. Great guy! I am having trouble setting and maintaining an idle. It appears the problem is with the return spring returning the carb to the idle position. It holds a high rev and/or returns to idle slowly, even when I manually return the throttle grip to the idle position. I do have the tank with the seam. I have some pics I will try to post after I figure out how!
 1963 CA77E by fyrmdk1, on Flickr  tank by fyrmdk1, on Flickr  engine number by fyrmdk1, on Flickr  frame number by fyrmdk1, on Flickr Sticky throttleCongrats on getting your bike running.
To help your idle you may need to take your right side switch apart. You will probably have to gently pry the rubber grip out of the housings. Be very careful. There is a little flat spring in the bottom housing that can fall out. Check it to make sure it is not gobbed up with old, hard grease that is creating drag on the metal pipe under the rubber grip. The inside of the pipe has a spiral spline kind of thing that pulls the hinge that the cable end rests in. The hinge may need to be greased where it rests in the handle bar. Inspect your hinge to make sure it does not have wear issues that are binding it in the pipe. Also make sure there is enough grease in the hinge-tube mechanism that it will work easily. Finally be sure to lube the cable real well to remove drag inside of it and/or see if you need to replace the cable. It is also possible that the slide in your carb is hanging up a little, but the above likely needs attention no matter what. Hope this helps. Conbs
Regarding your pictures of the 250 tank. I think that all early 250 tanks (certainly in Europe) had the centre strip, ' bug eye ' tank panels and right side filler. All my C72 (four of them) tanks are like that. Why Honda would use different tanks and side panels for 250 and 305 is a mystery to me. The tanks on my 1960 C77 and 1960 C72 are completely different. It must have cost a fortune.... Interestingly, that chrome centre strip doesn't even get a mention in the C72 parts book. It's a C71 part number... G '60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160 '66 Matchless 350 '67 CL77 '67 S90 '77 CB400F Early vs late tanksGraham,
I have a CA72 parts manual. I don’t know where I got it or even year of publication, though it has both old part numbers and NPS number, so it is probably ’66 or perhaps ‘65. It shows the chrome strip for the tank as part 18A with part number 17691-259-010 (c723921A ) “Ornament, Fuel Tank”. If I am not mistaken, the old part number starting with c72 indicates it is a C72 part. Is the C71 part number different? I was also looking at the 1968 Parts manual for CA72/77 and while it does not picture the part with the tank, on page 128 it lists the "ornament, fuel tank" part number 17691-259-010 with application for “C72 – 10001…C72 – 310401 and export C72 – A10001 CA72 – 311110”. Now, I am beginning to wonder if the model change from CA77 to CA78 occurred sometime in the '63 production year when the “early” CA77 tank was replaced with the “late” (CA72???) tank. The literature disagrees, but Stan and Fyrmdk’s bikes have CA78 frame numbers and “late” tanks. Anybody disagree with my theory or have pictures to prove it is wrong? I note that the ’68 parts book lists 4 different tanks for the C72 and 2 different tanks each for CA72 and CA77. Anybody know what the differences are among the 4 C72 tanks?
YA may need to rotate the slide so it is installed correctly.
When correct it will go to bottom. .........lm
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