tyre pressure!

[Hammerstrike]

Hey guys got myself a 12v digital tyre inflator. Not sure of the pressure though. My tyres are from Shinko (never heard of them before lol) the front is 110/90-16 G9P (or 69P) and the rear is 130/90 -15 M/C G6P (or 66P).

I tried to search online for the correct pressure, not sure i got the info for my tyres, the front was down to 13 PSI, got it upto 22 PSI now and the rear was 22 PSI got it upto 28 PSI.

Do you guys reckon this is fine?

dont want to over or under do it.

Cheers
____________________
Hammerstrike

[Copycat73]

personaly those pressures are wot I`d expect of a 125cc
the tires will have a maximum & minimum pressure range written some where on them keep to within those .. and cheap tire inflator gauges tell Lies .. buy a guage from a motor parts dealer.
____________________
Whatever I post I have no citation and no intention of providing one..
caveat emptor

[Taught2BCauti...]

It's difficult to trust any tyre pressure gauge unless you can calibrate it regularly - but some of the most accurate ones I have used are the old-fashioned 'Pen' types.

I worked at a refrigeration company a while back, and they had digital pressure gauges (manometers) that were calibrated every year, to within 0.05% - but they cost hundreds, and £58 just for the calibration!

I checked a digital and a pen type tyre pressure gauge of mine on an expansion tank that was pressurised to an known 40psi. The digital one read 2psi under, but the pen type was spot on!

You may need to experiment to get the pressures correct, but it's technically a CU27b offence if you get it wrong!
____________________
Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

[Ste]

I'd expect the manufacturers PSI recommendation to be on the the tyre wall.

30-35 psi when hot is the usual advice for tyre pressures.

[SQL]

[Ste]

They can take plenty more pressure than the maximum recommended pressure.

[Andy_Pagin]

The correct pressures are those stated for the bike by the manufacturer of the bike not the manufacturer of the tyres.
As others said, don't trust the gauge on an electric inflater, always use a pencil gauge.
____________________
They're coming to take me away, ho-ho, hee-hee, ha-haaa, hey-hey,
the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer

[Kickstart]

Hi

Shinko are Korean I think. They do quite a few tyres for drag racing, but for general stuff I think they started up by taking over Yokohamas motorcycle tyre range.

What bike is it on? That is the important bit for pressures.

[Hammerstrike]

It is a Hyusong Aquila 125. Will have a check of the tyres.

Cheers guys
____________________
Hammerstrike

[c_dug]

[Hammerstrike]

Apparently I couldnt find any psi info on the tyres.. tried googling but not much luck. Just got some info that for the front is 110/90-16 G9P it says 25 PSI and for the rear 130/90 -15 M/C G6P should be 28 PSI. As mentioned I drive 35 miles one way to work. should I fill 2-3 PSI above this recommendation?

Cheers
____________________
Hammerstrike

[Andy_Pagin]

Unless you're carrying huge amounts of weight just keep them at the factory recommended pressures. Upping the pressure will slightly reduce the amount of rubber in contact with the road which isn't a good idea.
____________________
They're coming to take me away, ho-ho, hee-hee, ha-haaa, hey-hey,
the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer

[c_dug]

Distance shouldn't make any difference to the psi, you would only up the pressure to keep the tyre cool and prevent deforming under weight (they're sort of linked properties).

What is the bike? That will be the decider on pressure rather than the tyre. Start at the manufacturers recommended pressure and work from there.
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[Commuter_Tim]

My CG is like 25PSI/28PSI Front/Rear IIRC.
I usually inflate to 1 PSI above rather than below, as it deflates slowly over time anyway.
Not done it any harm in years (However that's not to say it will not)
____________________
The above post is most likely nonsensical.

I ride a Bandit 600... badly.

[iooi]

[Kickstart]

[Hammerstrike]

Cheers guys. Big help this....
____________________
Hammerstrike