Squirrely back tire, why!?

Joined
Feb 4, 2007
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#1
The back tire seems to lose grip and get squirrely on my '97 YZ 125 when I really open her up... It's not so bad that I can't go WOT on it, but it feels like sometimes it loses torque because the back tire isn't gripping enough... I don't know if my weight has anything to do with it, I'm pretty small, only 130 lbs. I have Starcross tires on it.

Any ideas?
 
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Dec 22, 2006
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#3
What kind of Air pressure are you running? What is the terrain?
How worn is the tire? Where is your body positioned? If you answer those questions it would be easier to find the problem.
 
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#4
Tires are brand new... I run about 15 psi in the rear. Terrain is trails, hard packed dirt usually.
 
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#5
Are you riding really far up on the tank? If you are try butting your but in the middle or a little farther back but keep your head over the bars. Standing may help to.
 
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#7
A hardpack designed tire will help, lower pressure will help, body positioning helps too. 125's are kind of "sliders" by nature though.....they go fast with RPMs. They're kind of a whole different animal than a 4 stroke or a 2 stroke 250, where those bikes seem to grab traction.......a 125 is spinning and screaming. My son and I can move through the woods at the same speed, me making little noise and little tire spin on my 250........he's shredding, sliding, and riding at high revs on his 125. That's why 125's are just pure fun!
 
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#10
IndyYZ85 said:
You are so wrong.. Never put that much pressure in an MX tire..
I am not defending him but I need to run around 25psi in a regular tube up in the mountains in Pa. The rocks are unbeliveable I always see guys on the side of the trail because they ran 15psi in the rocks. I used to run around 27psi with a rugular tube, but now I can run around 20psi with my heavy duty tubes.
 
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#13


Near the bikes would be considered the extremely smooth trail. I dont have any pics of the trails I ride right now. (This Pic was from my riding bud), just take that and multiply it a few times. I know from expirence a 15-17 or 18psi tire will pinch up where I ride.
 
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#15
A Starcross as of now because Dunlops chunk and I can't get Millvilles without paying big cash for shipping. It's pretty much a lose/lose situation with tires.