Hello everyone

New to the forums and ATV connection.

I just purchased a V-Bike V4S a couple of weeks ago and have been reading the forums just to see the feedback and tips about the V4S. I noticed mine seemed to be down on power a bit from what I thought it should be but the more I rode it the better it performed, normal engine break in. I also read about moving the needle e clip down to the bottom groove and this helped allot also. In the process of rerouting the throttle cable to take a out a kink from poor routing from the factory I noticed that the thumb throttle lever had quite a bit of play at idle, by this I mean that when at idle you could pull the thumb lever backward toward the rider by more than 1/2 inch. I thought this was funny as the play seemed excessive to me. Now for the interesting part, curious as I am I pulled the air cleaner off and looked at the slide at idle, all ok, went to full throttle guess what, the slide only opened a little over half way, presto!!! To bad too late to test ride don't want to wake up the whole neighborhood but I bet money it will have more power.


Anyone who owns a V4S please check to see if yours is the same as mine as I am extremely curious to see if this is an isolated incident or a manufacturing oversight. Please post your findings here.

I am working several ways of fixing this but the hour grows late and I need some sleep, more tomorrow.


Thanks, Neal

 

I am just guessing the V's have this same adjuster on the throttle cable you see here on the picture. By adjusting it you should have it to where you are not increasing the Idle but there is very little play on the thumb throttle at the no throttle position. If this is adjusted correctly then you will have max throttle at full position. You right excessive play at the throttle will not allow the slider to go all the way up thus limiting the max RPM! You will see more power now!

 

Welcome to the forum General Electric J79, congrats on your V4S purchase. [img]i/expressions/face-icon-small-happy.gif[/img]

My bet is outofline is right on the money with the adjustment. My V4s has plenty of power but I will check mine tommorow, heck never know, I might be a little limited on throttle travel.

Outofline, my thumb throttle is identical to yours in the picture, those Chinese must run parts back and forth on mopeds between the Jet and Vbike factories.[img]i/expressions/face-icon-small-wink.gif[/img]

 

Thanks outofline for the info and also Coloradotrailrider for the welcome.

It was very late last night when I found the problem and I was not on my best game, very tired, but I looked for an adjuster on the carb top like a MX bike but the cable just fits into a socket on the lid and there was no adjustment on the throttle housing either. I had to do some digging to find the adjuster as it not very close to the throttle housing and it was hid under some of the plastic. I had to screw it out almost 1/2 inch to take out the slack. Amazing what a lack of sleep will do for your problem solving skills. I don't know if it vibrated loose because I only ran it for maybe one hour, or it just wasn't adjusted properly at the factory.

For the price you can't beat it, and I like to work on stuff so a Chinese quad is just up my alley.


One issue I ran into is my V4S came with a front fender painted like normal for a v bike but for some reason it was molded from white plastic not black like the back fender so if you got a chip in the paint the white plastic would show through. I talked to Tim at v bike and sent it to him to exchange it for a black molded one.

Also while riding it I noticed that it would turn sharper one way that the other so while the front fender was off I thought I would center the steering link between the stops and re adjust the tie rods to make the quad track straight. While doing this I noticed that the tie rod end nuts were hitting the frame before the arm was hitting the stop. Some how the person who welded the arm onto the steering shaft did not get it straight and it got welded on a angle so it need a new steering shaft to make it right. Have to call Tim tomorrow and see what he says.








Thanks, Neal

 

Neal, I had the same issues on my V4S and my brother-inlaws V4S. Check outofline's web page, he has excellent photos for increasing the turning radius in both directions. My tie rod ends also hit the frame before touching the steering stops. I hacksawed the extra length of the tie rod off to clear the frame.

Outofline's fix for turning radius was to grind some steel off of both sides of the steering shaft stops. This worked great for the two V4S ATVs I did.

 

Hey Coloradotrailrider


I called tim at V-Bike today, I think he is getting tired of hearing from me but he said that they have sold thousands of V4S quads and I am the only one who has had this problem. I sent the shaft to him for exchange, I hope the new one is welded on straight. I thought about making a new arm and replacing the one that's on the shaft but I thought I would take the chance that the new one would be better. I have been doing machine/tool and die work for 20+ years so I don't have a problem making most items.

I do have major plans for the V4S though. After the one year warranty is up. He! He!

1. Make a new battery box and mount under seat between rear crossmember and tail light.

2. Make air box to take a larger K&N filter and mount it under seat behind shock with air tube to carb.

3. Longer rear axel if I can find one, any ideas? Or build my own wheel spacers. I mounted my rear tires on the opposite side with valve stem to the inside as the shallow dish was the one with the valve stem. Gives me maybe two or more inches wider stance in the rear. With them installed with the valve stem to the outside the front width was way wider that the rear.

4. Remove the cali emissions.

5. Remove the restrictive baffle in the muffler can, replace the pop rivits with stainless button heads and make oring groves in the aluminium endcaps to seal ex gasses from leaking that nasty black gunk on my new stainless V4S muffler.

6. What ever else I can think of.

Neal

 

Wow, those modifications sound great.

I replaced my stock air filter with a Uni Filter. The Unifilter has two layers of foam that can be oiled with a good air filter oil.

I also plan to widen my rear axle. I found some solid machined aluminun spacers on Ebay that are two inches each in width. The front of the Vbike from side to side is 43 inches and the rear 38 inches. With the spacers on the rear I will get a total rear width of 42 inches, real close to the fornt. The spacers go for about $70 and some change with shipping. The bolt pattern is 4/110mm.

Bruce

 

i have seenthis in a few posts...as i am from the uk and have not been in the usa to long can someone help me find out what this is and where it is...thanks !!!!

its the cali emmisions...i take it its a restriction of some kind

please explain

 

i put wheel hubs off of a 400ex on the rear of my son's 150, and spindles and rotors off of 450r works great with a wider stance.

 

Split !!!!!! where have you been old buddy. Hows the V4S holding up?

I'm not sure what your asking in your post about the emisions. Do you have a picture?