Push and Pull

I just got my vf 500 f running. Full tank of fresh gas and a splash of sea foam in the tank. The bikes idles a little low, but I can adjust that. The bike pulls great, but when just cruising I can feel then engine pushing and pulling. I have only done 10 miles so far since I got it running. My assumption is that there is probably just some gummy sticky dirty stuff in the carbs because it's been sitting for close to 2 years. I am thinking if I put a 100 miles on it the push and pull will go away. The bike has 25K miles and outside of it being wrecked it looked in good condition. What say you?


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I don't know what happened to my post. Check for dirty carbs, vacuum leaks and for fuel line issues, such as collapsed fuel line, dirt fuel filter, etc.

 

A worn-to-hell drive chain can cause a push/pull feel too. Get rear wheel in the air and spin it to check for a series of loose and tight spots as the chain rotates.

 

My first guess is lean surging due to anorexic factory jetting... don't know if that was a common issue with the 500 however.

Ride it a few more miles, then pull a plug or 2.

If the plugs are off-white or white you're into lean territory.

 

Yeah, if it's been sitting that long and you didn't pull the carbs and got it running with fresh gas and seafoam(which is kinda surprising) then I'm sure there are some gelling or deposits that may need some attention. It doesn't take much to clog the slow speed circuits. I'd run a few tanks with the seafoam through it and see how it goes before doing anything else. The carbs probably need syncing as well.

 

I rode yesterday for about 20 miles and it seems it got better, but problem still exists. It seems like it's the idle jets where the issue is. When you are on the throttle it pulls like a beast (kind of shocked how hard it pulls) it's just when running 55 mph in top gear that I can feel it kind of tugging. It's really not a big issue and the normal person probably wouldn't notice but I am a perfectionist and I notice it. I figure once or get a few hundred miles on it and it the problem still exists I will pull and rebuild and clean carbs. UGH!


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55 in top gear is too low, at least for my 6h gen. I guess yours is geared differently, I don't know, but it sounds an awful lot like you are lugging the poor thing to an early grave.

 

The 500's are a totally different beast.

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You may have a rodent problem:joker:

 

55 in top gear seems good on this bike. I know the difference between a wrong gear selection and a chugging carb.


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I would have to believe the 500 is a five speed, so it would be turning 5-6 grand at 55.
So no issue there, but I still recommend pulling plugs after a few more miles. No cost and they'll tell the story 90% of the time.

True indeed, and seems to be a gen 6 thing, luggage for days at anything below 70 in sixth.

 

here is what I have figured out thus far Chain was wayyyyyyyyy too loose. so got that tightened up and that solved majority of problem. I have narrowed it down to this thus far.

When I am in 5th Gear or 6th gear around 5500-6200 rpms, thats when the push pull issue is most present. its like a chugging issue. i also adjusted the idle up a

tad but the bike still has a tad issue at idle, unless the bike is very very warm. So if I start it at 10:00 am and let is idle til 10:05 odds are it will cut out at the first stop sign

 

I wonder if at that 5k or 6k rpm that's when the carb is going from idle jet to main jet and that's where the issue is? Ugh I don't want to take carbs off


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bump. Any comments?

 

Did you try Redwing's suggestion of plug inspection? Is there a multimeter test of the coils? Some reading seems to indicate that symptoms from such failures may appear in that RPM range.

 

I checked plugs and they look normal. I will post a pic when I get home. I am still. Hoping it's just some clog in the carbs that the seam foam will work out. I still really have put that many miles on it. It really seems the only answer. Regarding the coils. It seems weird that they would work fine but only hesitate at that range but work fine in the higher and lower range. never heard of that before


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