So... today I filled my daughters stock tires on her LT50 to 20 lbs and let her rip around on a dirt track. Her bike has had a number of mods and really flys. Usually I run her at 8-10 lbs when we run on sand or if we are jumping. At the higher preassusure I notice a little more take off and maybe even some minor top end improvement. What I mostly saw was a serious loss in control. She thought this was all kinds of fun but I could see the lurking danger of losing control chasing close behind her.

In your experiance what has been the best all around tire preassure for these faster mini quads?

 

we run about 4-5 pounds in our Snowhogs for MX racing.

Bryce

 

20 lbs! That must almost be bordering on dangerous.Most atv tires are meant to be run with 5 or less PSI.I run our Viper at an even 5 psi all around and that is pretty hard.You can experiment to see what works best but I have never gone over 10 psi on my own DVX 400 when racing and usually run the fronts a little harder than the rears.I normally run something like 5-8 lbs front and around 4-6 in the rears.Keep in mind the full size bike has a much better suspension than the mini's.Half of their suspension is the sidewall flex in the tires.LOL.With your tires blown up that hard how much of the tread is actually still touching the ground?

 

Proly get a little more top end with 20lbs but it sure seems like it would cost you on take off.

 

Yeller, Yep I am laughing with you regarding the extra suspension in the side walls but its for real!?. I left the tires at 20lbs for ttr racing on saturday and did notice an increase in top end. Scared me again though, as the track got rutty she really had to hang on. I have her back at ten lbs today on areana style track and felt better about the handleing. When we ride next I will try the offset pressure front and rear.

Thanks guys.

 

with 20lbs in them the tires are probably 2" bigger in diameter. that would be your increase in top speed. as everyone else said i run 5 in the front holeshots and 4 in the rear snow hogs. may change by a pound or 2 according to the track surface.

Mark

 

I run 4 in front on the 19" holeshots and 1.5 to 4.5 on the rear 18" Snowhogs. But alot depends on track conditions and type of soil. But I've never have run 5 lbs anywhere. I did run 5 in a test run and he didn't like it. He could tell the difference with a 1 lb change in pressure. And this is all with good suspension. One might not notice the change on stock shocks. But 20 lbs! I would almost be afraid to blow one up to that let alone let a child race it. But thanks for doing the test for the rest of us. Now we know that it will hold together. I will add that all these pressures are for XC setup .

 

Yes at 20lbs the tread only had about three inches on the ground. SCARY. I think that if I were to run her like this regularly I could be put over into the derilic dad catagory. Just plain dangerous. Thankfully she is good at paying attention to the bike and is carefull to not let it get out from under herself to badly before she lets off and discusses issues with me. On these stock tires the lowest I have never run is 8 lbs but I will try these lower pressures. My concern with the 5lbs range is cornering. Especially when racing she really hammers the throttle thru the corners. She is a very agressive little rider and creates opportunities for herself then pins it. As we practice it will be interesting to see if the bike trys to track itself following the flex of the side walls... tinker tinker. Our next race is Gorman in September, hopefully I can pull enough ducks together to put the holeshot/snowhog combo on as mentioned earlier. Sounds like a good set up.

Interesting six-year-old rider note: On the first practice day she was worn out more quickly and later complained of a little headache and sore back. Nothing major but I suppose I could pull from this that not only rider safety but rider wear and tear is at issue with rock hard tires. I don't want to hurt her little bone structure.

LT50... i think, had said that he added three inches to the swing arm. Has anyone else tried this? Where was it added (behind the shock mount, in front)? Did this add rider comfort and or cost any performance?