1985 vf700f What can I do to increase performance?

Hello,

I recently bought a 1985 VF700F motorcycle, and I pulled it into the house to work on it Im wondering what my options might be for more performance? Can I upgrade the ignition coils?, Jet the carbs? performance chip?

The bike runs fairly well now, but it a little sluggish when you first start it, till you let it run a few min.It also has a bit of smoke that comes out the tailpipe after sitting for a week or so. But that could be from the oil leak in the back of the engine, that appears to be coming from a rubber hose going into the engine.

Any suggestions, or tips are appreciated. Also I was wondering how safe it is to wheelie these old bikes? I got it a few inches off the ground for a bit, but the bike seems real heavy in the front. Of course I would only practice them on a closed course..ope2:

 

+best thing is to sell your antiquated POS bike and STEP UP to an '86/'87 VFR.....

or the newest newer VFR you can find a good deal on.......

wheelies are naturally unsafe and for idiot kids, the insane and the criminally negligent....how are old are you??

 

Hey buddy...go fuck yourself! Anyone have anything usefull to say other than calling my bike a pos?

 

PrplHaze I'm thinking squirrelman was just messin' with you....he owns 3 '86 VF's according to his profile. He is a little nutty (pun) on chat. Honda's are notorious for being cold blooded so I wouldn't sweat it. For more power I would look into jet kits, pipes, and maybe sprockets. As for wheelies...as long as your fork seals and steering head bearings are good, roll on.

 

ACTUALLY, Y2K you mean 3 VFR's, not VF's.

I have no interest in antiques with known serious problems like the VF series.

 

Lemme see here, you sign up and within the first 6 posts you're telling somebody to go f@$k themself? So do *you* have anything useful to contribute here? Hello???

As a serious suggestion to your initial question, Canadian model VF's (as well as the rest of the world not dealing with Harley protecting tariffs) were 750cc's and engines are interchangeable. If you're that attached to the bike VF engines are not in high demand and it would likely be less expensive to upgrade to a complete runner with the correct carbs etc.

Keep in mind you're new here and it may pay off to chill out until you get a sense of the community. Most are exceedingly helpful and humor can be very tongue in cheek - unless you go off half cocked on somebody and make a permanent enemy.

 

Well, i know i wasn't following Forum Rule #1: never tell anybody their bike is bad.......even if it is.

 

Thank you Y2kviffer, exactly the kind of responce I was looking for. Is there a way to ignore certain ppl on these forums if you think they are jackass's? Forums are supposed to be friendly and helpful and informational, not, "get a newer bike, cause yours is an antiqued pos". Tends to upset ppl some..If I had lots of cash I would get an 08 something or other, but I dont , and this is what I have. In real life, would you walk up to someone on their bike and say "nice antiqued piece of shit you got there"...not unless you were a total jackass...nuff said...bring on the flames

 

First off, there is no fuel injection so there is no "chip" to be replaced.

Sure, there is tons of stuff you can do. It really depends on how much time and money you have to spend. You are looking at major engine work to do this, the bolt-on approach you mention isn't going to get you anywhere. Let us know exactly what your expectations are and we can help direct you better. Are you looking for 5hp more? 50hp more?

By the way, the early VF7's won't wheelie.

 

Well, Im looking to get probably about 10 more hp. Trying to get the most bang for the buck kind of deal. My dad suggested pipes, but Im not sure if the stock pipes are the best option or not. As far as time and labor, I have plenty of both, money is my main problem.

I have honestly gotten the bike to wheelie allready. What I did was pull in the clutch while riding in 3rd, rev the engine up a ways, and dump it into 2nd.
I managed to pull the front wheel about 4-6 inches off the ground, and held the wheelie shifting into 3rd, up to around 75mph. I have yet try a wheelie from a standstill. Is there anything I can do to lighten the front end.? I dont want to change the sprocket at all, because It allready majorly sucks gas on the freeway, only 5 speeds..

Thanks again for all the replies. Oh I talked to my dad about painting, and I think I am gonna take some parts to my uncle for some airbrushing. He has been airbrushing stuff since I was a kid. Im thinking some flames would look cool..:smile:

 

That's doable, but a header alone isn't going to get you there. You are going to need a good 4-1 exhaust and cams to get that kind of power increase. There is more to be had, but that would require disassembly of the engine and a lot more $$$.

I hate to rain on your parade, but it probably didn't happen. A VF7 will barely pull the front wheel off the ground in first, and that's not even something to be described as a 'wheelie'. Second? Third? At best you had the front suspension extended all the way, that's what you felt as the front tire being up 4-6 inches. The 1000's will barely pull the tire like that, and they are the same weight and have 30+ more hp.

 

It will do a reverse wheelie if you hit the front brakes hard going fast enuff

 

Hi PrplHaze, if you want the biggest gain for the smallest amount of money, then your best option is to swap the engine, you could easily spend £500 to £1000 on a set of headers, cams, and re-jetting your carbs, or you could find yourself a vf1100 engine for probably less than £100 with it's carbs and headers, that's going to give you almost 20hp more, with a nice big amount of torque that will help with the weelies. Otherwise if you've got the cash, why not just give you engine a good overhaul and make sure it's in good nick, and then fit a supercharger kit to it.
When it comes to weelies what do you use your bike for mostly? if you jsut play around with it and try weelies and stuff, then fit a much bigger rear sprocket, that will get you weelieing really well, but it's going to make the bike pretty useless on the road as the engines going to reving really high at low speeds.

 

i have to agree with prplhaze ive def had my front tire well in the air 1st 2nd and 3rd.... and then i kick my self in the ass cuz i still havent done the top end oil mod.

any sugestions on where i might find cams??

 

not to rain on peoples parades but wheelies? come on all that does is trash you suspension and bend a lot of stuff up then your bike or POS whtever you what to call it is UNSAFE. just some friendly advise..don't be a squid ride it a hair above normal and call it good... BTW PRPLHAZE.. how old are you? you never answered. I MHO I would worry about getting the bike tuned up getting all the right gear (ATGATT) and then taking a MSC from school or your local office of the Highway patrol(or whoever offers it) get a little time under your belt dry your ears off and have some fun before you go breaking the bike up.... One more thing.......that Jamie guy......he knows all about the early models of the VF/VFR listen to what he says....he is pretty much the Pope on that subject.

Cheers and welconme to the site it is a good place for information and knowledge as well as respect.. you can give all three and get all three its real simple.. later

ride safe youngster

Crusty

 

My old roomate that introduced me to VF's could wheelie his '84 750 by standing on the passenger pegs and poping the clutch in second going around 25 or 30. He totaled it doing that so just keep in mind that all you have to do is mess up once and your bike is gone.

Find a vf750 engine and throw it in there. that will be the best hp gain for the money for sure