Project "I was only gonna clean the air filter!"

[E ticket rider]

Any one  run bridgestone M-22s any more? 
 Its been a while since Ive had to buy tires.

[Motorrad]

Any one  run bridgestone M-22s any more? 
 Its been a while since Ive had to buy tires.

Never ran a bridgestone tire I liked. 

[81cr450]

I really like this

http://www.ebay.com/itm/Michelin-Starcross-HP4-90-100-21-Front-Dirt-MX-Tire-/180842010076?hash=item2a1b0615dc&item=180842010076&pt=Motorcycles_Parts_Accessories&vxp=mtr

Cheap too

[Motorrad]

I really like this

http://www.ebay.com/itm/Michelin-Starcross-HP4-90-100-21-Front-Dirt-MX-Tire-/180842010076?hash=item2a1b0615dc&item=180842010076&pt=Motorcycles_Parts_Accessories&vxp=mtr

Cheap too

I have one of those on my KX   because it was free...

Works great on hardpack (if you air it down, Like 12psi)    but doesnt work as good as the MX71.   and the MX71 outshines it in the sand.

[USMC 500]

The wife has an unusually shaped gift under the tree for me.........It is large, round, and shaped like a Dunlop MX71 90/100-21 and a Maxxis Desert IT 120/100-18.....Anyways this is the first time I'll run these tires.........Is there anyone out there in KX land that can give me some good base line tire pressures to start with?

[Motorrad]

I hear the hot setup in the desert right now is running a vacuum in the tires. It "sucks" up the bumps better than  pressure

[USMC 500]

I hear the hot setup in the desert right now is running a vacuum in the tires. It "sucks" up the bumps better than  pressure

Vacuum?  Great Idea..........I still need a value though!!

[Motorrad]

327Kpa

[USMC 500]

I once dated a girl who was capable of delivering 327 kilopascal's of vacuum........

[Motorrad]

I once dated a girl who was capable of delivering 327 kilopascal's of vacuum........

Still have her number?

[Motorrad]

Have you considered popping the $$ for tubliss?

[USMC 500]

Do I still have her number?.............Thankfully, NO....

Have I considered running tubeliss?............yep.......eventually.

[Motorrad]

Do I still have her number?.............Thankfully, NO....

Have I considered running tubeliss?............yep.......eventually.

d**n...   I needed a New Brake bleeder..    Go find her number.



The Tubeliss is worth every penny.... If I had some more Penny's   My K5 would have em in it.

they worked AWESOME all the way to canada and back.. on the KTM.


the only drawback...  If you do need to add air... (to the innner bladder)   You need a way to generate 110psi.   My ONE mountainbike pump I carry on Dualsport stuff did this no problem... as well as fills up the main tire as well..





Okay.. now to ansewer your original question.

Depends..

The BIG tires, (lots of sidewall in these suckers... especially the maxxis).   So you can get away with less pressure than your used to, due to the ammount of volume they have (especially the front)...

the major determining factor... is what tubes your going to run

speed's,   terrain  


My last race... I was running 12 up front, and 13.5 in back.   With the Bridgestone ULTRA heavy duty tubes (same ones the baja boys run).. as they are 4mm thick..    problem they are HEAVY HEAVY HEAVY.. and about $45 each.

many fellow racers run LESS   (alot run 10 front, and 11 back)...     that scares me with a tube in racing conditions...  

and once more... I know MANY NON racer, weekend riders that run 4-8PSI in the MX71 tire...   and about 8-10 in the maxxis



With the Tubliss... you can run LOW LOW presssures.   There was several times on my Canada trip... we came across NASTY rock sections... I just aired down to TRIALS TIRE pressure..     and crawled through...    couldnt have done that with a tube.



Keep in mind... D38 is alot faster than D37  (speeds)..    as we have more wide open / sand wash's..      you have more rocks... so.... need to tailer you tires to your area.     But you should be safe with the pressure I was running.  12/133.5..   and play with it and find what you like from there

[USMC 500]

Sweet......

Her name was (at least the name she gave me) Elizabeth Pena and the last known address in the city I picked her up was in Long Beach, CA.  Can't remember street names or numbers.  Nice girl.  Gave me a special going away present just before I left on one of my deployments to the litterbox........

Back in 2003.

[Mohave]

Just some more notes on the Tubliss...
I ride in the high desert (China Lake) and have been running them for a few years now.
Overall they are awesome.  Had on a 450X and now the KX500.

I have tried many types of tires and combinations and for out here the taller, stiffer tires seem to do the best.
But even with that you can't go too crazy with the low pressure if you ride in rocks.

For example one ride through the El Paso's (local mountain area) has what you can think of as a fire-road with softball to basketball sized rocks (not always smooth) for miles.  Some rides ago with a tough carcass front tire I somehow managed to dent the rim so bad that the Tubliss could not keep the tire pushed up against the rim well enough to seal.

The great thing about the Tubliss setup is that I got home just fine, as a matter of fact, until I smacked the next set of rocks just a little wrong (do that more than I would like to admit) I did not even know I had lost all front air pressure...so another dent. 

Now even with a Tubliss I still run around 8-10psi front, but rear (with a Desert AT) or even your Maxxis Desert IT you could easily run a few psi, some guys even run zero, with a very stiff sidewall rear tire.  I typically run about 4psi on the rear.

Hope this helps and you should like you tire combination for where you ride.