I've just about completed resurecting my 1984 Magna v65 from the dead. I wanted to ask a few questions of what to look for when completed. Specifically, so far all looks good with the exception that I have low vaccum from the #1 Carb. What should I look for to correct this? Any help is greatly appreciated.
If anyone has any questions for me on what to expect or where to find parts, please feel free to ask. I feel we all should share our experiences that can help others with there issues.
Sounds like a bad diaphram.
How are you testing the vacuum to know it is low?
A cylinder pulling less vacuum could be due to a stuck, or incorrectly opening/closing valve.
Thanks guys. This is what I've done so far. My friend, who's knowledgeable with carbs connected a mercury gauge set to the vacuum ports on the carbs. Carbs 2, 3, and 4 all had high readings but the #1 Carb barely registered. We swapped gauge positions to make sure that it was a leaky gauge tube but the problem still showed on the #1 Carb. I also sprayed a cheap can of carb cleaner all around the carb to see if I could hear the engine rev change. No luck there either. A compression check of all cylinders reveals that the #1 cylinder was reading approx. 156 psi. All others were reading 175 psi and above. The bike has been sitting for over 10 or 15 years. We plan on checking the compression again after riding the bike for a while. I forgot to mention that the bike does idle smoothly and does not bog down when throttling. In fact, the more I ride it, the more it seems to run better. Remember it has been sitting for a long time. We think it just needs breaking in again and the compression will come up on the #1 Cly. So far the bike is not burning oil and it has no fluid leaks. When time permitts, I will see how easy or hard it will be to check the #1 carb diaphragm. Thanks again and if you have more suggests, I will be checking back from time to time.
Well don't be a stranger and do keep us posted might be a stuck ring like you guys are thinking might pop loose with a little fun !!!
try alot of Seafoam.
I would consider adding some Marvel Mystery oil to the crankcase....I have done it many times on engines that have set for years and got the rings to reseat....Also a little in the gas will help all your o-rings, ect. in the fuel system..Just an old mans 2-cents.