Post by floz on Jul 21, 2015 15:36:52 GMT -5
Laika, my ATM50 rat-rod project has the same tiny tires, and I can concur on pressure. If her tires are slack, she's not as much fun or as stable.
When I first bought Laika, I set at 35psig on both at first. After about 7 miles on the hot concrete, I rechecked and found 37 front, 38 rear. It rode like a dream. Gross weight is a factor too, I'm kind of big for a stock 50cc, at 240'ish lbs without gear. Add a toolkit, fuel, and my backpack, and we're probably close to overloaded from the start. Downhill on Spring Creek Parkway in Plano, Texas, I was doing every bit of 50mph, keeping pace with the crazy Plano car traffic, grinning like a loon.
Me, I'm a "how does it feel" kinda guy. Laika feels pretty good at 35psig cold front and rear. I did work on a fair number of these Chinese 50 and 150cc bikes when I was professionally turning wrenches. For average or larger-than-average adults, I wouldn't recommend less than 33psig front/rear on a ATM50 or similar 50cc Chinese bike.
Have you checked the twin nuts on the top of the upright behind your front fairing? They wiggled loose on mine shortly after I brought it home, and made it feel very unstable when cornering and when braking on the way to buy a stator the following day. One of my coworkers has told me his ATM50 did the same thing, and it startled him quite a bit before he figured out what was up, because everything looked fine until you go for a ride and push it a little, then it "feels" wrong.
When I first bought Laika, I set at 35psig on both at first. After about 7 miles on the hot concrete, I rechecked and found 37 front, 38 rear. It rode like a dream. Gross weight is a factor too, I'm kind of big for a stock 50cc, at 240'ish lbs without gear. Add a toolkit, fuel, and my backpack, and we're probably close to overloaded from the start. Downhill on Spring Creek Parkway in Plano, Texas, I was doing every bit of 50mph, keeping pace with the crazy Plano car traffic, grinning like a loon.
Me, I'm a "how does it feel" kinda guy. Laika feels pretty good at 35psig cold front and rear. I did work on a fair number of these Chinese 50 and 150cc bikes when I was professionally turning wrenches. For average or larger-than-average adults, I wouldn't recommend less than 33psig front/rear on a ATM50 or similar 50cc Chinese bike.
Have you checked the twin nuts on the top of the upright behind your front fairing? They wiggled loose on mine shortly after I brought it home, and made it feel very unstable when cornering and when braking on the way to buy a stator the following day. One of my coworkers has told me his ATM50 did the same thing, and it startled him quite a bit before he figured out what was up, because everything looked fine until you go for a ride and push it a little, then it "feels" wrong.
