Tire Pressure??

[outdoor]

So i set f
My front to 33 and rear to 42. I understood that if they are set to the correct pressure the pressure should not rise too much. By too much i believe 4 psi.

Well my front rose to 40 and rear to 50.

Should i have a lower cold pressure so when they increase it is not so far out?

 

[Sierra1]

. . . . Should i have a lower cold pressure so when they increase it is not so far out?

Nope. Chances are when you checked it "cold", it was colder than the day that you rode. I usually lose 2-3lbs/week. If I set my cold air pressure the week it was 50°, and the air temp rises 10° by next week, it will show that I didn't lose any air that week. The pressure increased on its own just by the ambient air temperature rising. And aren't y'all having a heat wave this week?

 

[WJBertrand]

Setting the pressure lower will actually cause a larger proportional rise in pressure, not lower. The extra flexing of the tire will cause it to run hotter increasing hot tire pressure.


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[OldRider]

The number I've always heard was 10% rise from cold to hot. Any more and the tire is underinflated.

 

[TenereGUY]

I run a TPMS system that gives me constant read out and my tires can go up 2-3 pounds for riding sedately at the speed limit. Go fast and they go up to 4-5. The rear is usually more when I am working it or if the day becomes hot they will rise more as has been mentioned by Sierra1, also the flexing of your tire has been mentioned. Thise are the reasons unless you weigh your bike down with another rider and gear for a trip. If going two up raise your pressures by 2#. Loaded maybe another pound on the back.
Many times a gas station gage isn't very accurate so be sure to use the same gage for measurement.

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[Eville Rich]

So i set f
My front to 33 and rear to 42. I understood that if they are set to the correct pressure the pressure should not rise too much. By too much i believe 4 psi.

Well my front rose to 40 and rear to 50.

Should i have a lower cold pressure so when they increase it is not so far out?

I wouldn't worry too much about that pressure rise from cold to hot. There are lots of things that cause variance in tire pressure:
-how you ride
-the air temp when you set it (cold) compare to when you check it (hot)
-changes in ambient air temp will lead to roughly a 1 psi change per 10 F change. So if you set pressure at 50 F and the bike just sits, with air temp rising to 60 F, you'll gain a psi.

There's nothing specifically magical about the manual's tire pressure recommendation. I probably wouldn't go below that intentionally. Higher is generally fine, to a point. I'm not sure what that point is. But a higher psi helps reduce the temp of the tire, which is a good thing.

Eville Rich
2016 S10

 

[TenereGUY]

I wouldn't worry too much about that pressure rise from cold to hot. There are lots of things that cause variance in tire pressure:
-how you ride
-the air temp when you set it (cold) compare to when you check it (hot)
-changes in ambient air temp will lead to roughly a 1 psi change per 10 F change. So if you set pressure at 50 F and the bike just sits, with air temp rising to 60 F, you'll gain a psi.

There's nothing specifically magical about the manual's tire pressure recommendation. I probably wouldn't go below that intentionally. Higher is generally fine, to a point. I'm not sure what that point is. But a higher psi helps reduce the temp of the tire, which is a good thing.

Eville Rich
2016 S10

Get to high and traction actually will go down as the contact patch becomes smaller and less compliant with the road surface and even with ABS you can lock up the front wheel.

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[Cycledude]

Recommended tire pressure is printed on a very easy to read sticker that can be seen when the seat is removed.
As others have said it’s normal for the pressure to go up as the tire heats up from use, supposedly the maximum heated up pressure should not go over 52 psi , higher than that the tire is in danger of exploding.

 

[OldRider]

"Recommended tire pressure" is a sort of fit all number they came up when the bike was built and for the tires available at that time. A 2013 model will now to be running tires that are ten years better than when the bike was built. Let's say Big Bob weighs in at 240lb and the little woman adds another 180lb along with 40lb of necessary junk in the bags, Big Bob is going to need a lot more tire pressure than Little Billy riding solo at 135lb and no junk. Tire pressure are like a box of chocolates and no flavor suits everyone. Run them too low and the outside edges of the tires are going to wear too fast and run too much air and the centers will wear out. Find out what fits you and remember, if you're riding in the states, you will wear the left side off first and if you're circling around a bunch of Castles across the pond, you will wear the right side first.

 

[Eville Rich]

Get to high and traction actually will go down as the contact patch becomes smaller and less compliant with the road surface and even with ABS you can lock up the front wheel.

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Agreed. You can too high, but you really have to try. I do think it's advisable to consider the range of weather that expected over a day. If you set things high and it's 30 F outside, but ride where it's 80, you could be in trouble. But a few psi on the high side won't make that much difference, in terms of max pressure when the tire is hot. Some people increase their tire pressure above spec to reduce tire cupping. Seems to be OK.

And if you are off-road, then some of the lower pressure concerns change, with airing down OK, so long as you don't forget to air-up for extended road riding.

 

[outdoor]

The number I've always heard was 10% rise from cold to hot. Any more and the tire is underinflated.

Exactly, and mine rose more than 10%. That is starting at a fairly high beggining cold pressure 33/42

 

[OldRider]

Exactly, and mine rose more than 10%. That is starting at a fairly high beggining cold pressure 33/42

IMO, 33 in the front isn't enough for highway riding.

 

[SkunkWorks]

I typically run 38-front, 40-rear (cold) unless I'm loaded with a lot of luggage, then I run 42-rear.
I never lower tire pressure "off-pavement" either for a few reasons, but that's just my style.

 

[TenereGUY]

IMO, 33 in the front isn't enough for highway riding.

Depends on the tire. I put on a set of MotoZ Tractionator Adventure tires and the max pressure is 35. I'm riding it at 31F, 33 R. Feels great and no problems

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[Longdog Cymru]

Why all the discussion over tyre pressures? Just consult Yamaha’s recommended pressures from the manual.

Tire Air Pressure/Inspection; Tires - Yamaha SUPER TENERE XT1200Z Owner's Manual [Page 74]

Yamaha SUPER TENERE XT1200Z Manual Online: tire air pressure/inspection, Tires. 0–90 Kg (0–198 Lb): Front: 225 Kpa (2.25 Kgf/Cm, 33 Psi) Rear: 250 Kpa (2.50 Kgf/Cm, 36 Psi) 90–209 Kg (198–461 Lb): Front: 225 Kpa (2.25 Kgf/Cm, 33 Psi) Rear: 290 Kpa (2.90 Kgf/Cm, 42 Psi) Maximum Load*:...

www.manualslib.com

 

[StefanOnHisS10]

 

[SkunkWorks]

Why all the discussion over tyre pressures? Just consult Yamaha’s recommended pressures from the manual.

Tire Air Pressure/Inspection; Tires - Yamaha SUPER TENERE XT1200Z Owner's Manual [Page 74]

Yamaha SUPER TENERE XT1200Z Manual Online: tire air pressure/inspection, Tires. 0–90 Kg (0–198 Lb): Front: 225 Kpa (2.25 Kgf/Cm, 33 Psi) Rear: 250 Kpa (2.50 Kgf/Cm, 36 Psi) 90–209 Kg (198–461 Lb): Front: 225 Kpa (2.25 Kgf/Cm, 33 Psi) Rear: 290 Kpa (2.90 Kgf/Cm, 42 Psi) Maximum Load*:...

www.manualslib.com

Because there are a great number of riders who are not running the factory Yamaha tires.

 

[TenereGUY]

Because there are a great number of riders who are not running the factory Yamaha tires.

Or are the weight of said Yamaha ideal rider...

 

[Longdog Cymru]

Because there are a great number of riders who are not running the factory Yamaha tires.

The manual gives you pressures for a range of respective weights or loading. There is a damn good reason for this, but if you choose to go your own way on tyre pressures, then that’s fine by me. I just think Yamaha know best. I trust Yamaha, but there are a lot of opinions that I dont trust or agree with.

 

[OldRider]

The manual gives you pressures for a range of respective weights or loading. There is a damn good reason for this, but if you choose to go your own way on tyre pressures, then that’s fine by me. I just think Yamaha know best. I trust Yamaha, but there are a lot of opinions that I dont trust or agree with.

I didn't know that we had a member on this forum with your knowledge and wisdom. Do you mind if anytime I need to know anything, I contact you for the correct info? I'm going to check my tire pressure next week and look foreword to your advice.