Z1OwnersClub GB

I just removed the oil cooler, and crankcase feeds from my z1000 A1 as I want to return to the standard oil pressure switch housing.

Is there anything special about the o-rings that seal it to the case ?
I couldn't work out if they had a flat profile because they've been compressed for 30 years, or if they're meant to look like that.

Will any new o-ring of the right size do ?

I was going to buy a 440 piece o-ring kit so I'd always have a stock in the workshop, but I see I can pay from £6 on eBay to £50 for o-rings made from 'viton' .

As far as I can make out cheap = made from 'nitrile' and good to 120c.
Expensive = made from 'viton' and good to 200c.

What are you supposed to use in bike engines ? Can't seem to find the answer anywhere else.

Thanks for reading.

part no 670B2018 still available from kawasaki

Pete, new ones will have a round profile, as you suggest 30 years + will have left them a little flat.....

Surely you wont need 440 O rings to fix the problem??

jimmock wrote:Surely you wont need 440 O rings to fix the problem??

When I saw Jimmock had responded to this question I was afraid to open up the subject especially in work

steve bowdler wrote:

jimmock wrote:Surely you wont need 440 O rings to fix the problem??

When I saw Jimmock had responded to this question I was afraid to open up the subject especially in work

Wise move Steve,

Guys have been sacked for less!!!

As you know, I search the site constantly for engineering problems that I can offer engineering solutions to.

Viton is a flurocarbon rubber and probably 'over engineered' for any standard road going air cooled Z. It's used where maximum resistance to elevated temperatures are required. However it has a low compression set so won't exhibit the problem you describe.

I doubt Kawasaki were using them in the 70's or early 80's though!

StevieT wrote:Viton is a flurocarbon rubber and probably 'over engineered' for any standard road going air cooled Z. It's used where maximum resistance to elevated temperatures are required. However it has a low compression set so won't exhibit the problem you describe.

I doubt Kawasaki were using them in the 70's or early 80's though!

Cheers for that ! - makes a lot of sense. Always happy to save some money

Viton range of 'O' rings, for the most part, are dimensionally the same as OEM whereas rubber ones aren't. You can normally find a rubber "O" ring in a kit with same OD but its CS is not the same normally smaller in Cross sectional diameter.

My two cents, take a look at: http://www.polymax.co.uk/o-rings/rubber ... s284-viton

Mike

Good info but do they work the same ?