I've also revived my new to me 1983 Magna V45 in the summer/fall last year, 0 experience with bikes but lots with late 90's and newer cars. I needed to do a bit of everything, including valve adjustment and I'm surely going to be needing a better condition head sooner or later, she's a little rough. Oh well, first bike and I've made her run quite well!
Yeah, they sure were. Not sure how true it is but I read somewhere that the V65's were the fastest production bike in America at the time of release. I do know that 40 years later my 750 is no slouch even by today's standards. Still plenty fast and fun to ride.
@McMoto pls I need your on my Magna v65 1983. It's overheating when riding in traffic and it will go off and won't start again until I bump start it by pushing it or us a big amps battery
Well, that's certainly interesting. I'm not sure why the overheating would cause it not to start unless you're trying to restart it immediately and it hasn't cooled down. But I would start by obviously checking the coolant level and topping off if needed. Then I would check the weep hole on the water pump to see if it is weeping. Those two things would be the first steps. If you can do those and get back to me we can see what we can figure out. Also, check out v4musclebike.com. Everyone over there is super helpful. And chances are there's already a thread you can find having to do with your problem.
it will need head gasket. I Have 84 vf65 with the same symptoms. It was fine as long as I ride on freeway but will spit out coolant from reservoir when we do stop and go traffic. I have not done the job, i bought the head gasket already but sold the bike before i got to do the job.
I have an 88 Honda magna, and whenever I try to start it the starter motor won't engage, I have a fresh solonoid and battery, and idea of why she won't start?
Well I never bought any new replacement parts for mine. I just bought a used head off ebay and swapped it out. But I've bought parts for other bikes and usually went through partzilla.com. They've got just about everything and usually their prices are pretty good. I'd take a look there if you haven't already.
@@mcmoto5424 yeah, pretty much everything I've checked as far as OEM and aftermarket have been discontinued, I found a set, but it's overseas and shipping with the cost kinda leaves me looking for alternatives, aside from special ordering from a piston ring manufacturer, I'm not entirely sure of all the tolerances, I know the bore for a 750 is like 70.10 mm and rings are 69.85. that's about as much as I know so far.
@@mcmoto5424 also, as an alternative, I've located some used engines, only 1 has uniform low compression, 40s and 50s, others have good compression on 3 and 0 on 1 of the cylinders. I'd rather have the uniform compression then the question mark on the 1 cylinder.
Idk, that sounds like awfully low compression though. If I remember correctly I think those engines are supposed to be around 120 or 130 psi. You'd probably need to do rings on that one as well for it to run or at least have any power.
Its impossible to have a piece of the adjuster get inside the combustion chamber. Also the valve retainer clips are always a two piece. Still nice work, keep it up!
@@mcmoto5424 it is phisicaly impossible. The pieces that broke can only fall to the sump. Only way to enter anything on the combustion chamber is via the carbs. What might happen is that someone removed the carbs at some point and some thing fell in the inlets. Think about it, if you could have thing from the valve train get into the combustion chamber, then you would have a massive hole on the head, meaning coolant on the oil no compression and a blown engine ready for the scrapward. I'm sure that the missing part of the adjuster is in the sump somewhere
@@mcmoto5424 I've been a mechanic all my life. You didn't need to replace that head. Youve gone too far, all you needed to do was replace the two broken pieces and i'd replace the valve , relap them all in and refit it all. You do not need to replace the head because of a mark, just polish it out a bit.
@krislees976 Definitely had to replace the head. A piece of the valve shaft broke when the valve hit the piston, creating an opening for the keeper and the piece itself to fall into the cylinder. So you're all wrong. Sorry.
@@mcmoto5424 But they are not all the way wrong. Without personally examining the head it would be impossible to fully diagnose. where the above comments are correct, is, that in the NORMAL COURSE of things, those valve parts or keepers cannot get into the combustion chambers. Of course when things are whirring around in there at high speed, anything can happen, when something breaks. It takes careful analysis sometimes to figure out what happened first, and what was the result, of the initial failure. A chain of events.
Thanks. I was actually hoping to be able to record the whole process and have it be even more informative and easy to follow. But I'm glad it's still of some use and/or informative for others.
Well there's a good chance it's just in need of a valve adjustment. That's what I thought was all mine would need because these magna's are known for valve train noise and needing frequent adjustments. Unfortunately for me, mine ended up being a pretty extreme circumstance where I actually had a valve failure. But the adjustment is pretty easy and straight forward to do yourself. It does take a little time since you have to drop the radiator to get the valve cover off, but it's not so bad. If you're going to tackle it yourself then definitely check out v4musclebike.com. All the info and step by step instructions you need are there. Also, feel free to contact me with any questions as well. Good luck! Hopefully you can put another one of these classics back on the road.
I just got mine running. I have the same bike. Found your channel from the V4 forum.
Just bought one, 86 V45. Found your video to be Very informative and good luck with your Machine, there Great!!!
I've also revived my new to me 1983 Magna V45 in the summer/fall last year, 0 experience with bikes but lots with late 90's and newer cars. I needed to do a bit of everything, including valve adjustment and I'm surely going to be needing a better condition head sooner or later, she's a little rough. Oh well, first bike and I've made her run quite well!
Good deal. Magna's are fun.
Nice, good save, I have a 1984 V65 those MCs were way ahead of their time.
Yeah, they sure were. Not sure how true it is but I read somewhere that the V65's were the fastest production bike in America at the time of release. I do know that 40 years later my 750 is no slouch even by today's standards. Still plenty fast and fun to ride.
Nice bike , I have e 1986 v45, love her!! 5k original miles
@McMoto pls I need your on my Magna v65 1983. It's overheating when riding in traffic and it will go off and won't start again until I bump start it by pushing it or us a big amps battery
Well, that's certainly interesting. I'm not sure why the overheating would cause it not to start unless you're trying to restart it immediately and it hasn't cooled down. But I would start by obviously checking the coolant level and topping off if needed. Then I would check the weep hole on the water pump to see if it is weeping. Those two things would be the first steps. If you can do those and get back to me we can see what we can figure out. Also, check out v4musclebike.com. Everyone over there is super helpful. And chances are there's already a thread you can find having to do with your problem.
@@mcmoto5424 okay thanks I will surely do that tomorrow
it will need head gasket. I Have 84 vf65 with the same symptoms. It was fine as long as I ride on freeway but will spit out coolant from reservoir when we do stop and go traffic. I have not done the job, i bought the head gasket already but sold the bike before i got to do the job.
I have an 88 Honda magna, and whenever I try to start it the starter motor won't engage, I have a fresh solonoid and battery, and idea of why she won't start?
Well I'd make sure you have good ground. Have you tried jumping the solenoid?
Any suggestions on where to source piston rings? 83 v45 magna, 750 of course
Well I never bought any new replacement parts for mine. I just bought a used head off ebay and swapped it out. But I've bought parts for other bikes and usually went through partzilla.com. They've got just about everything and usually their prices are pretty good. I'd take a look there if you haven't already.
@@mcmoto5424 yeah, pretty much everything I've checked as far as OEM and aftermarket have been discontinued, I found a set, but it's overseas and shipping with the cost kinda leaves me looking for alternatives, aside from special ordering from a piston ring manufacturer, I'm not entirely sure of all the tolerances, I know the bore for a 750 is like 70.10 mm and rings are 69.85. that's about as much as I know so far.
@@mcmoto5424 also, as an alternative, I've located some used engines, only 1 has uniform low compression, 40s and 50s, others have good compression on 3 and 0 on 1 of the cylinders. I'd rather have the uniform compression then the question mark on the 1 cylinder.
Idk, that sounds like awfully low compression though. If I remember correctly I think those engines are supposed to be around 120 or 130 psi. You'd probably need to do rings on that one as well for it to run or at least have any power.
Unless you could leak down test it and determine it just needs valve work.
Good video.
Its impossible to have a piece of the adjuster get inside the combustion chamber. Also the valve retainer clips are always a two piece. Still nice work, keep it up!
@@mcmoto5424 it is phisicaly impossible. The pieces that broke can only fall to the sump. Only way to enter anything on the combustion chamber is via the carbs. What might happen is that someone removed the carbs at some point and some thing fell in the inlets. Think about it, if you could have thing from the valve train get into the combustion chamber, then you would have a massive hole on the head, meaning coolant on the oil no compression and a blown engine ready for the scrapward. I'm sure that the missing part of the adjuster is in the sump somewhere
You are correct, it had to have fallen in during an engine reassembly or some such thing.
@@mcmoto5424 I've been a mechanic all my life.
You didn't need to replace that head. Youve gone too far, all you needed to do was replace the two broken pieces and i'd replace the valve , relap them all in and refit it all.
You do not need to replace the head because of a mark, just polish it out a bit.
@krislees976 Definitely had to replace the head. A piece of the valve shaft broke when the valve hit the piston, creating an opening for the keeper and the piece itself to fall into the cylinder. So you're all wrong. Sorry.
@@mcmoto5424 But they are not all the way wrong. Without personally examining the head it would be impossible to fully diagnose. where the above comments are correct, is, that in the NORMAL COURSE of things, those valve parts or keepers cannot get into the combustion chambers. Of course when things are whirring around in there at high speed, anything can happen, when something breaks. It takes careful analysis sometimes to figure out what happened first, and what was the result, of the initial failure. A chain of events.
Good job! Very infomative
Thanks. I was actually hoping to be able to record the whole process and have it be even more informative and easy to follow. But I'm glad it's still of some use and/or informative for others.
@@mcmoto5424 keep on putting out the videos. I'm going to look at a 1985 V65 this weekend.
Great bike I have the same one
Yeah, wish I still had mine. Just sold it a few weeks ago since I've got a street glide and never really rode the Magna.
hey i have same noise on my magna 750c 84.. thank you
Well there's a good chance it's just in need of a valve adjustment. That's what I thought was all mine would need because these magna's are known for valve train noise and needing frequent adjustments. Unfortunately for me, mine ended up being a pretty extreme circumstance where I actually had a valve failure. But the adjustment is pretty easy and straight forward to do yourself. It does take a little time since you have to drop the radiator to get the valve cover off, but it's not so bad. If you're going to tackle it yourself then definitely check out v4musclebike.com. All the info and step by step instructions you need are there. Also, feel free to contact me with any questions as well. Good luck! Hopefully you can put another one of these classics back on the road.
Have the same noise
I have an '82... 😎
BLAH BLAH BLAAAAAAHHHHHH!