Author Topic: Wr 250 1991 3rb  (Read 551 times)

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Offline DODGY555

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Wr 250 1991 3rb
« on: September 03, 2016, 07:20:59 AM »
just want to know if any one knows the correct oil mixture im using motorex cross power 2t synthetic mixing 20ml per litre of fuel should i use a non synthetic and if so any ideas??
Swm Rs300r
Yamaha IT 490
Wr 250ZB
Ducati Hyperstrada 821

Offline glen4

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Re: Wr 250 1991 3rb
« Reply #1 on: September 03, 2016, 07:29:29 AM »
I use 25ml per litre in my 98 WR, that's 40:1, I also use Motorex fully synth

Offline DODGY555

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Re: Wr 250 1991 3rb preferred oil
« Reply #2 on: September 03, 2016, 07:37:31 AM »
Thanks glen i was not sure if the modern synthetics effect the running.
Swm Rs300r
Yamaha IT 490
Wr 250ZB
Ducati Hyperstrada 821

Offline fred99999au

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Re: Wr 250 1991 3rb
« Reply #3 on: September 04, 2016, 11:12:09 AM »
The oil mix will affect the tune based on the oil that doesn’t burn displacing the fuel that does. It will have an effect on the jetting but at those ratios you may not notice.

Offline Jim Archer

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Re: Wr 250 1991 3rb
« Reply #4 on: September 06, 2016, 08:36:36 PM »
The oil doesn't really displace much in the way of fuel, and it does mostly burn these days.

What it does do is increase the 'weight'/viscosity of the fuel and make it less easy to pull off the jets. Some oils are worse than others for this.

Jim
It's not so much a question of IF, more WHEN and how HARD.