1992 750ss compression test

[Dennis menace]

Does anyone know what the cylinder pressure should be for a 1992 750ss engine?
I measured mine at about 100 psi in each cylinder but I can't find out what the maximum should be. Google didn't turn up any results and I do not have a manual. Thanks.

[Dennis menace]

Also, is the in-line fuel filter in the tank standard and where can I get one?

[Kato]

Should be around 140 with a less than 10% diferential between cyls, should be done with the engine warm

[Dennis menace]

Kato, many thanks - a bit low then, though the engine was cold. No change in pressure with a squirt of oil in the barrel but the pressure was holding so no obvious leaks.

[Dukedesmo]

The hot/cold test can make quite a difference, My M900 (high-comp pistons) reads around 20psi less when cold.

For the record I got 213psi front and 208psi rear with the rear showing the greatest drop on a cold reading.

[Dennis menace]

Dukedesmo, good to know thanks.
If and when I get the engine to run for a while (carb problems I think) I'll do a test on a warm engine!

[Mr Gazza]

The fuel filter on the injection Monsters, which lives inside the tank is a Mahle 145 If I remember correctly...Probably the same for an SS ?.

I found the cheapest to be Opie Oils. That particular one is also common to a lot of BMWs and is sold as a replacement BMW part.

[DrD]

Also, is the in-line fuel filter in the tank standard and where can I get one?

If its a carb your filter is on the RHS of the bike - outside of the tank

[Mr Gazza]

The SS models with carbs have an internal fuel pump with a filter perched on to of it.

My haynes manual shows a plastic cased filter which looks to be exactly the same size as the Mahle 145. The Mahle one has a metal case and is important to get the right one for the Monster as it fits in a clip fixed inside the tank.
The SS one appears to be quite ridgidly fixed to the pump by a short piece of rubber tube. whether or not it is clipped inside the tank I do not know.
Without being certain I would say the "145" would work, but if not, there are plenty on here who would take it off your hands..

[Dennis menace]

Mr Gaza, it is the one inside the tank and I found one on fleabay - many thanks. Not the Mahle 145 but a 'Ducati' one from Portugal at a reasonable price.