Hitchcocks Forum

hi,

Just bought a new EFI classic in green and have the alarmingly issue of humming the great escape theme tune whenever I ride it...

On a more curious note, what tyre pressures do you guys run the new efi's on? The manual says 18 front 28 rear (for solo) and the bike from the dealer is around 30psi front, 36 rear...

She handles fine (but i am only pottering about at 40/45 whilst running in).

Thanks for any help.

36 psi is usually associated with the older iron barreled bullets.



Efi's are more like the 18 / 28.

30 in the front seems rather too hard.

I have used 18psi front and 28psi rear without any problems I think the ride is better than with high tyre pressures, I tend to set my tyres at 20 front and 30 rear works ok

Whilst the RE Handbooklet for the EFI-500 Classic does indeed say say 18/28 (Pillion 20/30), Avon the maker of its Roadriders says 27/29.

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http://www.avon-tyres.co.uk/motorbike/5 ... sic-chrome *

I had been using the RE pressures and whilst this seems alright for casual riding I've experienced some difficulties getting her around very, very tight corners, she doesn't want to fall into the turn.

So I raised front pressure to 25 and the problem is gone.

Steering lighter, handling much improved, less tendency to skip sideways on stones, and if anything improved grip especially under braking, more predictable and controllable.



I'm a good 15-stone so 30psi "pillion" suits me solo with the rear bouncers on No.2 soft and comfy setting.

The OEM indian inner tubes seem to be porous and need very regular checking, they're always low.



It seems Avon are correct with 27/29



* you have to enter bike type in the search box

yup, running 27 & 29 and scraping the brake pedal on right handers...

In January jeffrs said,

"Ok but look, tyre pressures are critical for safety. Modern sports bikes are loaded roughly 1:1 front:rear so they have higher front pressures. This is probably why Avon's recommended pressures are higher, they calculate use for sports bikes, I've seen their tables.
Now the RE CGT owner's manuals says F=20/22 R=30/32 running on 100/90-18 and 130/30-18 Pirelli Sport Demon vv the C5 F=18/20 R=28/30 90/90-18 and 110/80-18 Avon Roadrider rubber."

Looks like you have changed your mind yet again jeffrs?. I do have trouble keeping up, are you now saying both myself and Avon were right last month?.

Dennis, if you actually had read what I wrote, you'll have seen I never actually stated Avon or you were wrong. Merely pointed out that we have two sets of valid figures from RE and Avon and that tyre pressure is safety-critical. And I'm not getting into your made up 'black is white' arguments. Jeff.

Jefrs, I did read what you wrote, I have just been back and read the entire thread again very carefully, if you were not insisting that the tyre pressures given by Royal Enfield are correct and the advice of Avon was wrong then I am sorry but really don't have a clue what you were trying to say, it is not made any easier due to all the mumbo jumbo you wrote.

Bazza if you really want to be confused go back six pages and read the thread.

If anyone is interested whether I am saying black is white you can read the original thread here.

www.hitchcocksmotorcycles.com/viewforum ... orumorder=

I still think 18psi is a misprint in the manual, it is worrying low for a front tyre pressure for on road use.

The closest I come to that is 20 PSI on the 5inch by 16inch rear tyre on the CX500 Custom sidecar outfit when the sidecar is empty.