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Thread: Tyre pressure?

  1. #16
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    Quote Originally Posted by Oliver12345 View Post
    according the servo reader.
    Get yourself a good quality gauge and stick it under your seat. Ignore what the servo gauge says, they're all different anyway and some are out by enough to be dangerous.
    Go soothingly on the grease mud, as there lurks the skid demon

  2. #17
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    Quote Originally Posted by Ocean1 View Post
    Get yourself a good quality gauge and stick it under your seat. Ignore what the servo gauge says, they're all different anyway and some are out by enough to be dangerous.
    +1 Pay the money for a decent gauge.

  3. #18
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    Quote Originally Posted by Maha View Post
    I have always run at 42 rear and 36 front. Checked the psi yesterday and the rear was around the 36 mark front at 32. First time I have checked the tyre pressure since owning the bike, a little remiss of me I know, should have done that the day I go it.
    And I think that demonstrates the answer I would have given ...

    That depends on the rider ... I certainly notice when my tyre pressures are down by that much ... especially on the front end. The handling is just not quite there. but I have seen a rider who's tyres looked soft ... he had no idea it would affect the handling because he hadn't noticed any difference. The tyre pressure on the front of his bike was 15psi. I couldn't believe he could corner with that low a pressure - but he did.

    So - that depends on the rider - and probably on the bike .. A cruiser rider might not notice but a sportsbike rider is more likely to ..
    "So if you meet me, have some sympathy, have some courtesy, have some taste ..."

  4. #19
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    Quote Originally Posted by 5ive View Post
    I reckon it depends on the size of your tyre mostly.

    After 10000kms my stock tyres were in need of replacement, so decided to get new ones the same day of heading off on my bike for a holiday. After the new tyres were fitted I noticed a massive difference in handling, cornering was a lot harder as the bike would not 'turn in' as easy on tighter corners. I was taking it easy to scrub the tyres in, and the roads were pretty smooth as well, so I thought maybe it was just the new (better quality) brand of tryes. It did not feel like they would have been safe at higher speeds or in sharper cornering.

    So I decided to check the pressure when I got back and found that the person who had fitted them had inflated them more than what my stock ones were: 6psi over on the front, 8 psi over on the rear. Tyres were the exact same size as stock: 110/70 R17 front, 140/70 R17 rear.

    I'm guessing they don't pay much attention to tyre pressures when fitting tyres, one psi for all

    I deflated them to the stock pressures listed on the psi chart on my swingarm: 28 front, 32 rear, and handling was immediately improved again.

    I don't know for sure what effect being under-inflated by 6psi would have on handling, but on my smaller tyres I'm guessing it would be soft and worse than over-inflation. Bigger bikes with larger tyres would probably be slightly softer, but still manageable.
    Yeah - over-inflating is just as bad as under-inflated .. makes the bike skippy and hoppy (I dunno the proper technical words) ... feels horrid !!! At speed they feel really horrid .. and cornering is scarey ...
    "So if you meet me, have some sympathy, have some courtesy, have some taste ..."

  5. #20
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    Quote Originally Posted by Oscar View Post
    +1 Pay the money for a decent gauge.
    Yip. I have an air gauge that connects to my compressor to add air, but I use a pen gauge for the reading. The two are always different but I trust the pen gauge over the inflation one.

  6. #21
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    I can tell right away if my tyres are a couple of psi out. I run quite low pressures on the road ~30psi cold front and rear (tyre depending). So even 6 psi equates to a 20% pressure change.
    I recently put on a pilot power 3 on the rear and was constantly searching for a preferred tyre pressure, a couple of psi lower would cause the bike to squirm and wallow around. A couple of psi higher would cause it's to skip easily on slightly uneven road and cause really annoying chatter

  7. #22
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    Skipping is set up not rubber , it will slide if its too hard not bounce . Gas station guages can differ by up to 15 psi , Recommended tyre pressures are ball park only , the softer ,the hotter therefore grippier but too soft they wallow and wear quicker .The oppisite for harder . Get your own guage and find what works for what your riding and how your riding it .

  8. #23
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    imho yes greatly

    But personally I have always been quite sensitive to tyre pressure especially the front. Has a large effect on handling imho.

    I remember jumping on my mates 996 once the fucken thing was a pig and that was after he had ridden it 400k on a trip.
    Sluggish, fell into corners, wouldn't turn well.
    Stopped at Turangi to pump it the extra 5 psi it should have had, completely different bike, bloody nice handling actually

    Same thing with another mates new VFR800

    Also Maha you may remember my SV1000 when it was delivered to your place.
    Felt like a pig to me till I stopped at the first gas station, same problem tyre pressures quite low.
    Thats no slight on who rode it there from Hastings, but just the difference in rider feel.
    It took new tyres, fork revalve and a bit of time fucking round with the fork heights to get that right.

    Even if the old Z1R is a few psi down annoys the hell out of me. I always check my pressures with my gauge before I leave for every ride even on the shitbox handling Bonnie.

    So I guess some dont mind, some do??
    On a Motorcycle you're penetrating distance, right along with the machine!! In a car you're just a spectator, the windshields like a TV!!

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  9. #24
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    Worth noting that modern tubeless bike tyres can lose pressure through the tyre carcase quite quickly.

    A couple of psi per month isn't unusual.
    Go soothingly on the grease mud, as there lurks the skid demon

  10. #25
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    Quote Originally Posted by Maha View Post
    Would tyre pressure of around 5-6 psi down on what you would normally run at, cause a notable difference on the bikes handling?
    From my own seat of my pants trials.

    Yes most definitely.

    My bike does not tip in as easily, it walks around the tyre carcass more readily, and generally feels spongy, not sharp and crisp.



    "No matter what bike you ride. It's all the same wind in your face"

  11. #26
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    Quote Originally Posted by Banditbandit View Post
    Yeah - over-inflating is just as bad as under-inflated .. makes the bike skippy and hoppy (I dunno the proper technical words) ... feels horrid !!! At speed they feel really horrid .. and cornering is scarey ...
    I am interested in what tyres and pressure you run on the bandit.
    I have the PR3 GT? Suzuki book says 42 seems way higher than what everyone is saying here.
    any suggestions?

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  12. #27
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    Quote Originally Posted by eldog View Post
    I am interested in what tyres and pressure you run on the bandit.
    I have the PR3 GT? Suzuki book says 42 seems way higher than what everyone is saying here.
    any suggestions?
    36 & 42 is pretty much the universal recommendation. If I was touring that's what I'd run.

    Triumph say 34 (tyre manufacturer says 36) in the front so if I check the tyre and it says 34 and I'm staying local that's OK.

    The Ducati manual went lower, 32 or even 30 in the front, I can't remember now, but there was a warning. if the roads were rough you could damage your rims. NZ roads are rough, so I didn't go below 34.

    I'll run as low as 38 rear locally. Apart from handling considerations, if your pressures are down you are accelerating tyre wear and costing yourself money. Tyres are expensive enough as is.
    There is a grey blur, and a green blur. I try to stay on the grey one. - Joey Dunlop

  13. #28
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    Quote Originally Posted by eldog View Post
    I am interested in what tyres and pressure you run on the bandit.
    I have the PR3 GT? Suzuki book says 42 seems way higher than what everyone is saying here.
    any suggestions?
    On my 650 Bandit I run Continental Road Attacks - at 38 and 42 psi ... (psi as suggested by Conti - Suzuki recommendation is less - and they work at that psi) I love them .. very grippy .. most fun tyres I had on it.

    On the 1250 I run Pilot Roads (currently 4 on the front, probably 3 on the back tomorrow as they don't have a 4) . Same PSI - 38 and 42. Anything less and I can notice the difference ..

    I ride for my own safety (well, sometimes and fun) - and I don't care what anyone else is saying - the tyres work at those pressures, on these bikes, the way I ride them ..
    "So if you meet me, have some sympathy, have some courtesy, have some taste ..."

  14. #29
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    Quote Originally Posted by Banditbandit View Post
    On my 650 Bandit I run Continental Road Attacks - at 38 and 42 psi ... (psi as suggested by Conti - Suzuki recommendation is less - and they work at that psi) I love them .. very grippy .. most fun tyres I had on it.

    On the 1250 I run Pilot Roads (currently 4 on the front, probably 3 on the back tomorrow as they don't have a 4) . Same PSI - 38 and 42. Anything less and I can notice the difference ..

    I ride for my own safety (well, sometimes and fun - and I don't care what anyone else is saying - the tyres work at those pressures, on these bikes, the way I ride them ..
    Pretty much where I run the 1250 too, and yes the handling is noticably sluggish and wallowie if they go under, specially the front.
    Every day above ground is a good day!:

  15. #30
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    Quote Originally Posted by Banditbandit View Post
    On my 650 Bandit I run Continental Road Attacks - at 38 and 42 psi ... (psi as suggested by Conti - Suzuki recommendation is less - and they work at that psi) I love them .. very grippy .. most fun tyres I had on it.

    On the 1250 I run Pilot Roads (currently 4 on the front, probably 3 on the back tomorrow as they don't have a 4) . Same PSI - 38 and 42. Anything less and I can notice the difference ..

    I ride for my own safety (well, sometimes and fun - and I don't care what anyone else is saying - the tyres work at those pressures, on these bikes, the way I ride them ..

    and Caseye - exactly the info i need.
    Been wondering about fork brace as the front seems to me to twist about, wondered if this would help too. Yeah I know I got to get the sag adjusted for me first. and maybe the suspension too.
    thanks for that

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