Author Topic: Proper tire pressure 500 classic  (Read 180 times)

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Gian4

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on: June 10, 2021, 07:43:52 pm
Need the brain trust again.  So I had a slow leak in my front tire.  I took off the wheel and brought it to a local shop....KTM dealer to change out the tube.  Brought it there because nearest RE dealer is 90 miles away.  They found a small hole where the tube had been pinched most likely at the factory.  Anyway they told me the manual recommendation of 20 psi front and 30 psi rear was way to low.  They showed me on the tire where the manufacture ( Avon ) recommends 42 psi cold front and rear.  What say you all?  I will say on the ride back home it rode better.  I'm just a little worried about going against the RE spec by so much. 
Thanks again for taking my questions
Gian4 


Guaire

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Reply #1 on: June 10, 2021, 07:48:13 pm
I go with 28 fr and 32 rear.
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Keef Sparrow

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Reply #2 on: June 10, 2021, 07:51:25 pm
I find 30 front and 36 rear works well on UK roads on my Bullet Trials.
Past: CB125-T2, T500, GT500, Speed Triple, 955i Daytona. Now: Royal Enfield Bullet Trials 500


Haggis

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Reply #3 on: June 10, 2021, 07:57:38 pm
42psi is the max load pressure not your everyday running around pressure.
28 front and 30 rear will be absolutely fine.
Just found a reply from Avon tech,

Thank you for the below information.
With regards to the Royal Enfield Classic 500 we recommend 90/90-19 Roadrider with either 110/80V18 or 120/80-
18 Roadrider at the same pressures 28psi front/ 29psi rear.
When riding with pillion or luggage we recommend to increase the pressure by 1-2psi.
Hope this helps.
Many thanks,
Avon Motorcycle Technical
« Last Edit: June 10, 2021, 08:03:16 pm by Haggis »
Off route, recalculate?


Richard230

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Reply #4 on: June 10, 2021, 08:46:06 pm
Dunlop recommends 24 psi front and 32 psi rear for their 19" K70 tires as used on the older Bullets.

My 2011 RE Bullet owner's manual recommends 18 psi front and 28 psi rear for solo riding.  20 psi front and 30 psi rear when carrying a passenger. Those pressures are likely fine for slow speed riding on a rough road, but seem too low for highway speeds, especially when compared with other motorcycle models of similar 418 pounds wet weight.

Haggis is correct that the pressure printed on tire sidewalls is the maximum recommended pressure for that tire and has nothing to do with the actual pressure needed for safe riding.
2011 Royal Enfield B5 500, 2018 16.6 kWh Zero S, 2016 BMW R1200RS, 2009 BMW F650GS, 2020 KTM Duke 390, 2002 Yamaha FZ1


Carlsberg Wordsworth

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Reply #5 on: June 10, 2021, 09:21:02 pm
It does irk me somewhat that RE still haven't updated their manual on tyre pressure. Those old pressures are even in the Haynes manual.

Avon do RoadRider MKII now which I didn't know until I looked.

What's interesting is that the 90/90 is 4psi ish more than a 3.25 -19.


Richie

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Reply #6 on: June 10, 2021, 09:28:42 pm
I like 28 & 30 as well.
!8 in the front per their manual always did seem low and squishy to me.
If less is more, nothing at all is the most.
More or less.


gizzo

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Reply #7 on: June 10, 2021, 09:57:06 pm
42psi is the max load pressure not your everyday running around pressure.


You'd think that someone who's repairing tyres for a job would know that,  huh? Guess not.
simon from south Australia
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Ove

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Reply #8 on: June 10, 2021, 10:56:05 pm
I go with 28 fr and 32 rear.
Same here, but on a Trials 500. Lower than this and the handling was too vague, higher than this didn't seem to improve handling any, but introduced a mild jittery sensation on poorer roads.


Gian4

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Reply #9 on: June 11, 2021, 03:28:22 am
Thanks to all that replied.  Appreciate the help.
Gian4