1986 Honda VT 500 C Shadow Troubleshooting, Repair, Maintenance & Tune… | Motorcycles catalog with specifications, pictures, ratings, reviews and discusssions

1986 Honda VT 500 C Shadow Troubleshooting, Repair, Maintenance & Tune…

5 Jan 2015 | Author: | Comments Off on 1986 Honda VT 500 C Shadow Troubleshooting, Repair, Maintenance & Tune…

had to remove radiator, need to know how to refill

vt500 missing at 4000rpm looses some acceleration or sounds like it is missing. Gets backfiring when deacelerating. any help would be great Comments: Mar 14, 2010 – Its got a new air filter on. Had the petcock off. cleaned the strainer and all seems fine there.

Having ridden it again today. The problem is when its at about 4000rpm above that or below the engine responds perfectly to the throttle. Susspecting this is a carb/feul problem.

Why would it only happen at 4000rpm!

Backfiring on deceleration is typically caused by carburetors that are out of sync. Having the carbs synchronized should improve or eliminate this.

On Valve Adjustments: I believe I need some valve maintenance on my 86 VT500. When I have it running there is an audible (though only if you put your ear low to the engine) chatter/chik-chik-chik noise. It was suggested by a mechanic who listened to it that this was the valves. They wanted 2-300 to adjust them. My question is two-fold.

First off, how can I be sure it is the valves? I did not own the bike for the first 14,000 miles so do not have an idea whether valves were ever adjusted or not. Could it be the cam chain, rather than the valves (which I assume is a much more severe and pricey problem)? Second, what would this job entail, were I to do it myself? I’ve never done engine work, but have rebuilt the entire cooling system (excepting the water pump), changed oil, fixed brakes, and removed/installed wheels.

Might this job be within my scope? How much disassembly is required on the VT500 in order to access the valves? I do have the Clymer manual and a good set of common tools. Any help is appreciated.

I’d love to save on the job by doing it at home, and would like to learn how anyway. I just don’t want to get in over my head and ruin anything. Thanks,

On Valve Adjustments: I believe I need some valve maintenance on my 86 VT500. When I have it running there is an audible (though only if you put your ear low to the engine) chatter/chik-chik-chik noise. It was suggested by a mechanic who listened to it that this was the valves. They wanted 2-300 to adjust them.

My question is two-fold. First off, how can I be sure it is the valves? I did not own the bike for the first 14,000 miles so do not have an idea whether valves were ever adjusted or not. Could it be the cam chain, rather than the valves (which I assume is a much more severe and pricey problem)?

Second, what would this job entail, were I to do it myself? I’ve never done engine work, but have rebuilt the entire cooling system (excepting the water pump), changed oil, fixed brakes, and removed/installed wheels. Might this job be within my scope? How much disassembly is required on the VT500 in order to access the valves? I do have the Clymer manual and a good set of common tools.

Any help is appreciated. I’d love to save on the job by doing it at home, and would like to learn how anyway. I just don’t want to get in over my head and ruin anything. Thanks,

Bleeding Air from Cooling System I believe I have some air in the cooling system. What is the proper/best procedure for bleeding air from the system? Thanks so much for the help!

Bizarre Sound from Cylinders/Crankcase I’m baffled by a very peculiar noise coming from my ’86 VT500. Twice now, after riding about 30 miles or so, I return home and put the bike on the centerstand. About 6 min after the bike has been shutoff I have a bizarre sound coming from the area around where the crankcase and cylinder casing meets. Strange as it is, the sound can only be described as a drawn out fart.

It is somewhat similar to a rubber band being vibrated, but closer to the sound of a low, bouncy ball like fart. I’m not kidding (kind of like: brwwooooowww). The noise lasts about 2 seconds each time and occurs 5 or 6 times in a row, separated by about 2-5 sec of quiet.

So, as the bike is off, I cannot imagine any process that is going on, aside from the heat dispersion that occurs normally. I thought maybe the noise, being fart-like, could be escaping air from somewhere. I am unable to further pinpoint the noise, it seems to emanate from that general area.

Honda VF 500 C
Honda VF 500 C

Aside from a very slight chatter (likely the valves needing adjusting?) the bike runs beautifully (I just repaired the cooling system, but it seems fine now and has no leaks). I’m certainly puzzled. Any thoughts?

Thanks so much.

Concerning gear shifting. I have an 86 VT500. I bought it with 14000 miles on it and have ridden about 600 miles of my own since. Downshifting from neutral into first (when prepping to move) it is rough about 50% of the time. When it is not smooth, it shifts with an audible clunk.

I find that it happens most when I am not moving. If I downshift into first as I am rolling to a stop it is usually as smooth as the other gears (all other gear shifts are smooth). I had one instance of stuck gear today. I was at a stop, in 3rd with the clutch pulled in. I went to shift down into first and the bike did not want to shift.

I rolled it back and forth and was able to eventually click it down through the gears (this shift was not rough, once I got it). Any ideas on whether this is the sign of a bigger problem, or just an old clutch? Thanks for any help.

Testing Water Pump I have a 86 VT500. I need a way to test the water pump reliably, rather than just making assumptions it’s ok based on other factors. The thermostat is new, the fan works, and the radiator is decent (not at 100%, maybe 70%). I want to check the water pump, because the bike does seem to be warmer than expected, considering the cold air temps here. Granted I do not know what range the temperature gauge should be at under ideal circumstances.

It tends to sit in the mid to upper mid range of the white band. The bike has 14k on it, but I do not know how it was treated before I bought it. Thanks!

There isn’t any method for testing the water pump on your Honda VT500. It is driven mechanically from inside the engine, so it is either going to work, or not work at all.

The best you can do is remove as much of the hard water deposits from the inside of the radiator as you can – and carefully straighten any bent radiator cooling fins.

Honda VF 500 C
Honda VF 500 C
Honda VF 500 C
Honda VF 500 C
Honda VF 500 C
Honda VF 500 C
Honda VF 500 C


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