Slipping up a gear?

Hi Y'all,
I am a total newbie to this VF world, generally to motorcycle projects, but after doing my xs850 yamaha and loving every minute of the learning curve, well I picked up a 1984 vf750f for super cheap. According to the previous owner it had been sitting in the wood shed I saved her from for at least 4 years, because that's how long he'd had it and never once moved it. The gas in the tank was like syrup and the tank was loaded with rust (fixed and cleaned that, what a pain!) The motor would had good compression, I had spark, but the carbs, as you could imagine were a pretty hot mess. I pulled them, cleaned them thoroughly in doing so I broke the vent tubes and fuel tubes, well I like to think they were so old and crust they just broke. I replaced them with new ones, and new seals. Check! Finally, after a few days of playing with her, I got her to start. Making sure the temp was being regulated and the brakes weren't complete shit... I took her for a short spin to the end of my street and back - we are talking about 300-500 meters, total. I only shifted into 1st gear, but when I returned to the driveway of my home it seemed like she had shifted up on her own into 2nd or 3rd gear. I guess there could have been some user error, but is this a common issue with the hydraulic vf clutch?

Thanks very much in advance for any assistance.

Cheers,
SP

 

Sounds like your VF750F has a mind of it's own, and wanted to go for a longer/faster ride after too long trapped in a wood shed!

The hydraulic clutch on the VF is just like any other clutch, and definitely won't cause any unwanted gear changes. Gear changes happen when the gear shift lever is moved, which causes the shift drum to rotate and that slides the shift forks to move the gears. Most likely you knocked the gear lever in your excitement during the stand down and dismount maneuver. Or your bike is possessed....

 

Could it be that your bike felt like it was up a gear because it lost power??

 

:grey::grey::grey::grey::grey::grey:
...Thanks Cadbury and BigJim....

After further study, I realize that the clutch works the same and shouldn't shift gears. Although in the shop manual it does say this could happen if something is amiss with the shift shaft, gear cogs, shift drum stopper, or shift forks. I don't think it's the cogs, because the bike hasn't been ridden that much, the other things perhaps are an avenue to investigate, but certainly NOT before an exorcism.
Today I will test her again while wearing holy water, a few crosses, with my local high priest on hand, and during peak daylight hours. OH, and I will be packing my beretta with silver bullets, just for good measure. BAHAHAHA.

Actually, as I thought about this, it could be that I missed neutral (small up shift), then kept missing neutral (up)... the shifting seems really smooth on this thing relative to my SV.

Thanks again fellas!

 

Let us know what you find.

 

I think you have answered your own question, easy to miss Neutral on old VF's.

 

#possessed... #exorcism

today she went thru the gears wonderfully. no issues finding neutral - must have been user error.

next stop: figuring out how to get the idle correct. she will start, idle and run with full choke on, but not even close if I start to move choke off.
I am thinking I have to play with the idle adjust screw and some more carb stuff... work in progress... she is uglier than hell, but cosmetics will come later.