On my front tire it says max psi 45lbs, my tire had like 32lbs or so to begin with.  Well i added 5 more lbs of pressure and it seems like my top speed increased 7mph according to my speedo.  The needle hits 115 now, b4 it barely hit 110.  And tire feel little wobbly at those speeds but not really a big deal.  What is the right tire pressure?

32 front 36 rear.  according to the sticker on the swingarm.

Thanks m8!

Quote from: Pinoy21337The needle hits 115 now, b4 it barely hit 110.

That's a slightly better improvement than it seems.  With higher air pressure, the tire diameter would have increased a little.  That explains the reduced friction with the road (and the higher speeds) but it would also have made the speedometer read slightly lower than usual!

EDIT: I don't endorse over-inflation ... I was just making a mathematical observation.  

I agree somewhat, i just filled up my tires tonight also, and then went for a ride on the highway, and i went 190 kmph for the 1st time on her, then it felt not stable so i back down, but i do think i coulda kept on going. This was read with the digital speedo and not the analogue. The analogue was already at 200, but its so off its not even funny. I kept the data saved from the unit, ill upload a picture. Might i add tho, the air temperature was actually quite cool. I was on the highway out of the city, so the air at night is perfect for the engine. Nice and cool. So that might have helped instead of warm air.

The main thing to remember with tire pressure is that the reason that the recommended is recommended is not because you'll blow up the tire (heck, you might, I dunno), but actually so that you have the right amount of tire on the pavement.  Motorcycle tires are designed so that when there is the right amount of pressure, the surface area when going straight is small, and when you turn it increases as you turn.

If you pump it up too much, it can throw the balance out of whack and you get less traction

if you don't pump it up enough if can have the same effect, or it can give you too much friction and slow you down.

I haven't ever heard of anyone with a "guaranteed" way to figure out what the ideal pressure is... it depends on the weight of your bike, you, other passengers, cargo, etc.

I do know that my tire wobbles a whole lot more when it's too low than when it's too high, but I usually keep it at 35-40.  I also have radial tires, which might make a difference.

Richard

I have had a few "wobbles" with wrong preasures and i would be very reluctant to do anything other than that recomended by Suzuki. Remember the recomendation is specific to the bike not the type of tyre.

I suppose if you were really clever you could make a slight adjustment to allow for your own weight, Suzuki probably make the recomendation using a typical "wet" bike weight plus 75k for the rider. 75k being the weight set by ISO (International standards org) for a "passenger"

Hardly worth getting the slide-rule out for, calculator even !