Honda305.com Forum

Things like this are often hard to diagnose but here's one idea. The throttle cable needs to be really clean and free to move. If it sticks and holds the slide a bit above the idle speed screw it can slowly move and drop the idle speed. WD-40 is a convenient cleaner to inject at the top and catch at...

My limited experience (N=1) tells me that you should have an easy time. I degreased the block thoroughly so as not to fill my oven and house with oil fumes. I heated the oven to 175℃ (350℉) and left the block in for about 1/2 hour. Less time would probably have been enough. Taking it to my workbench...

To answer your question, yes, you should see much more resistance on the secondary coil if you are getting any spark at all. And, if the right side was giving a good spark but the left wasn't, it seems to me that there would have to be a problem with the left side connector, wire, cap or spark plug....

A rebuild will no doubt be expensive, especially if you have to ship 20 kg of steel overseas. Perhaps replacing it would be better. I found a link to some used crank assemblies . Note that you need to get one that matches the model as the C77, CB77 and CL77 are all at least a bit different. I think ...

Have a look here: https://www.honda305.com/forums/viewtopic.php?t=7642947 . G-Man has contributed a lot of other useful stuff so you might find something in a search of his other postings. I did a DuckDuckGo search using " pressing honda motorcycle crankshaft " and lots of information came up. I str...

Your analysis sounds reasonable. You will likely have to re-bore or re-sleeve the cylinders and replace the pistons and rings. The one thing that comes to mind is that you may bend the cover if you aren't careful with the jack.

Back in the 70s I discovered that the bulbs that Honda sold were much longer lasting than the automotive 1157 that I could get at work for less money. I suspect that they were less susceptible to vibration damage. There was never a problem with the sizing of the base. They fit just as well and drew ...