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June 2nd, 2017, 03:55 PM   #11
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JBS high volume oil pump. Had one of those but it did not rotate smoothly
ended up using a ktm one with the JBS cover.
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June 2nd, 2017, 11:18 PM   #12
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Originally Posted by spanner View Post
JBS high volume oil pump. Had one of those but it did not rotate smoothly
ended up using a ktm one with the JBS cover.
Hi Spanner,
Which KTM did you use? Straight fit?
Did either increase pressure significantly?
Do you use the standard relief spring?
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June 3rd, 2017, 06:48 PM   #13
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77038011000 is 15mm wide, I think the JBS was 14mm?
so I surface ground it down to suite the JBS cover.

The JBS cover was causing some binding and I had to move the
hole the shaft goes through to stop that. Yours may be OK.

I added a 3mm packer as Bushie suggests to increase the oil
pressure. I do not have a gauge fitted so can`t give any figures
for the pressure.

I did a bit of work to the inlet and outlet ports with a 1/8 ball burr
and a pencil grinder to help the flow. A steady hand is required.

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June 15th, 2017, 12:37 AM   #14
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What's the easiest way to test that the pump is working? A mechanical guage tapped straight into the filter cover? If anyone has a gauge plumbed in permanently what did you use?
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June 15th, 2017, 05:59 AM   #15
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I Ride: 2008 700FK, 2002 628FST
I use a spare filter cover with an automotive guage screwed into it

I just put it on for the first few start ups after a rebuild
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June 23rd, 2017, 08:58 AM   #16
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OK, I borrowed a gauge, oil heating 0-300psi, a bit heavy duty but needs must. Tapped it into a spare cover, 1/8 bsp.
Around 15psi on fire up around 1800rpm, bring the revs up 3000rpm+ around 35psi...all good?
Left it ticking over until she was good and hot and the pressure drops, 10psi tickover and 25-ish with a blip. That would be due to hot thin oil?
Am I being a bit paranoid?
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June 23rd, 2017, 01:08 PM   #17
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That's about what I get on the 628 with no oil feed to the head

Plenty of pressure id be happy with it canolman
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