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Old Jul 24, 2012, 01:07 AM
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Gartenzwerg's Avatar
Austria
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Originally Posted by chktm View Post
All I can say is Manfred may be smart but obviously if you found it hard to drive there is something wrong.
Please show where I said that the Bike is "hard to drive"?

I said, if you put it to its limits around a track, it gets a handful.
That statement is based on the results of 2 years of racing, not on driving 1 Bike around.
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Old Jul 24, 2012, 04:51 AM
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Australia, QLD, Burua
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Originally Posted by Gartenzwerg View Post
Please show where I said that the Bike is "hard to drive"?

I said, if you put it to its limits around a track, it gets a handful.
That statement is based on the results of 2 years of racing, not on driving 1 Bike around.
I'm still not sure if Manfreds Bike just had a specific setup, or if this is how the VMX generally behaves. At a certain leaning angle, the bike suddenly "fell" into the corner. Once you are used to that, this can be really fast. But you have no room for driver errors. If you hit the throttle just a fraction of a second too late, your bike crashes into the inner track marker. The tires and suspension of the VMX works really good, the bike "rolls" much better and quicker into and around the corners. But you just cannot push the Bike over it's Limits, it suddenly breaks away.
All Bikes that I have seen using a single pivot have serious headshake issues, and when pushed over the limits they suddenly "break" away.
Fork rake is very steep. This is good for SuperMoto Racing, but not for Offroad!

Sounded like you found it hard to drive maybe just more wheel time needed. Are you sure Manfreds gyro wasn't lightened to make the bike more agile. You said when the bike corners it falls too quickly and was hard to catch. You found yourself hitting the inside barrier. Quick steering is a trait of these bikes but also stability is great as well, again with the gyro working at high RPMs. Excessive head shake can also be a factor and or the sudden breaking away that you described when the gyro isn't effective enough. No bike can be pushed over its limits but the VMX or MM drifts awesomely with some throttle control.I have only ever raced once on a grass track in Aus so dirt is all I know. I do know that in buggy tyres you can get different compound inserts to fine tune your tyres to the grip level. Also on slippery dirt Vehicles move around quite a bit so any tyre flex isn't that noticeable. Even drag car tyres flex an awful amount to help aid grip. Oh I've driven and ridden a little more than 1 bike to make my conclusions from also. I'm glad you are happy with your ARX as it seems to work well for your conditions however here in Australia and United states may be different to European tracks. Most of them are super hard packed dry and slippery that can be tyre eaters. Seriously you might get one day out of a rear tyre. That's where bead locks are great.
I compare these RC  bikes tyres more so to speedway tyres because they race on hard packed slippery dirt with loose dirt on top. Motocross is raced on tracks that are watered ripped and smudged in preparation therefore the tyres get more bite from a loose surface until later in the day when clay tracks can become very hard packed and slippery. A small change in tyre pressure makes a difference in grip levels. Also SuperX is raced on slippery and hard packed from start to finish and if you listen to RV he says he doesnt move around on the bike the bike moves around on him so much on these surfaces.
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Last edited by chktm; Jul 24, 2012 at 05:04 PM.
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Old Jul 24, 2012, 08:46 PM
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Thunder Bay Ontario Canada
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would the 2 of you please give it a rest.
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Old Jul 24, 2012, 09:36 PM
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Australia, QLD, Burua
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Originally Posted by CPTGUY View Post
would the 2 of you please give it a rest.
I thought discussion was what this is all about . Forget it.
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Old Jul 26, 2012, 09:40 AM
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United Kingdom, Beverley
Joined May 2012
154 Posts
Parts came for y bike today!
Got my shocks at home but I'm travelling back from work!
Oh and my motor has come aswell!
Thanks Venom/Atomik! For having the best customer service!
And thankyou Chris for the forks!
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Old Jul 26, 2012, 10:19 AM
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Post Falls, ID United States
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Cool, your welcome, enjoy!
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Old Jul 27, 2012, 09:43 AM
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United States, NY, Poughkeepsie
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I have a Q about front shocks.A while back someone said they filled the fr shocks all the way to top with oil.Well if he did that,then when the shock compresses it will just jam up.According to manual it says to fill to top of spring perch which is the top of piston.I do as per manual instruction,how much oil are the rest of you guys using.I know you are not filling it,but are you going a little extra or not.
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Old Jul 27, 2012, 06:15 PM
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Originally Posted by gurumods View Post
I have a Q about front shocks.A while back someone said they filled the fr shocks all the way to top with oil.Well if he did that,then when the shock compresses it will just jam up.According to manual it says to fill to top of spring perch which is the top of piston.I do as per manual instruction,how much oil are the rest of you guys using.I know you are not filling it,but are you going a little extra or not.
Gurumods I said I fill it to the top with the shaft fully compressed.
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Old Jul 27, 2012, 06:27 PM
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California central coast
Joined Feb 2010
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Interesting. I follow directions filling oil to top of perch but with shafts all the way out like manual shows. If you fill up to top with shafts all the way in, dont you have to also consider that half the spring is probably hanging out of the tube and that space is not taken in account?
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Old Jul 27, 2012, 06:31 PM
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Australia, QLD, Burua
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Originally Posted by JohnnyMc View Post
Interesting. I follow directions filling oil to top of perch but with shafts all the way out like manual shows. If you fill up to top with shafts all the way in, dont you have to also consider that half the spring is probably hanging out of the tube and that space is not taken in account?
I fill bleed and then install the spring with the shaft extended. Have no compression lock issues or extra leakage, works well if find. Johnny I'm a mechanic we never follow manuals. Always find better ways to do things. Works the same with real forks more oil height in the chamber better dampening.
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Old Jul 27, 2012, 07:30 PM
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Post Falls, ID United States
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The main point is to not over fill the fork tube and just cover the top of the upper piston by a little bit. That is about the max volume you want. The oil weight is a different matter.
Pushing the fork shaft in all the way to see when the total volume is filled is fine also but only if you account for the volume of the spring. Otherwise you can over fill the fork again.

Its very much a "feel" thing and see how the forks work and go from there.
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Old Jul 27, 2012, 10:40 PM
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I find there is still enough room for the spring and air in the top of the cap. No compression  lock experienced.  as Chris said do what you like based on feel. Have always set up my shocks and forks with max volume.
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Old Jul 28, 2012, 08:21 PM
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Australia, QLD, Burua
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Got a new app just playing. couple of slow mos
VMX450 (0 min 32 sec)

VMX450 (1 min 9 sec)

VMX450 (0 min 22 sec)

There is more in Johnny's forum and ThrottleJockeys if you are interested.
Having fun.
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Last edited by chktm; Jul 28, 2012 at 09:18 PM.
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Old Jul 29, 2012, 10:02 AM
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United States, NY, Poughkeepsie
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2nd vid is cool.A little slide and then wheely out of turn.NICE !!!!!!!!!!!!!!!
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Old Jul 29, 2012, 03:52 PM
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Originally Posted by gurumods View Post
2nd vid is cool.A little slide and then wheely out of turn.NICE !!!!!!!!!!!!!!!
Thanks gurumods, trying to improve entertainment quality now, having fun.
Am working on a longer one with all action. Will post when done.

Here's one with all action right through, not sure about the color earlier on, maybe the way I put it together. I'll practice different things and maybe add music etc to others later on. Enjoy some slow mo VMX action.

VMX450 All Action slow mo (4 min 3 sec)

Much the same but tried diff tech. Seemed better
VMX450 more action slow motion (3 min 50 sec)
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Last edited by chktm; Jul 29, 2012 at 08:40 PM.
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