| Author | Message | ||
     Andersonhdj |
Hi guys, i recently acquired a xb9 lightning, with a knock, which seems to get worse when ridden round the block, now, i have'nt stripped it as yet cos im busy with another project but i've been looking, changed the oil, but not the filter as yet, checked out the primary drive etc. Checked out the oil lines for crush/damage and traced the feed direction etc, now here's the thing, it would appear the oil is pumped thru the cooler and returned back to the filter housing at the same site as the pressure switch. This is my question, the way i see it, from that point it's passed thru the filter to the oil gallery. So if the filter is blocked for some or other reason, most likely lack of change-out for whatever reason, you will still register oil pressure? right or not? | ||
| Andersonhdj |
Okay, so i've removed the filter and it appears i am right. So blocked filter = plenty pressure to the filter and not much after it = knackered crankshaft etc. Yes,one shouldnt have a blocked filter, but, there's no accounting for stupidity etc. | ||
| Reepicheep |
If it's a pre 07 lightning, you might want to check the oil pump and oil pump pinion gear as well. They can wear. The new fancy race part that was standard in 07 and up fixed the problem (or maybe it was 06 and up...) | ||
| Andersonhdj |
Thanks fella, will look into that, i'm going to have to gut it anyway, there's traces of metals in the oil that indicate brinneling on a needle race so i'm expecting to have to do crank pin assy and probably rod set as well. It's an 03 btw. history unknown. | ||
| Andersonhdj |
Hi Guys, just another question, I have been told that an XB crank is only supplied complete ex factory, now this I find hard to believe because I was under the impression that this is basically an 883 motor reworked in terms of design and therefore shares similar if not the same mechanicals internally in some instances - the crank? | ||
| Andersonhdj |
So i have refitted the old filter, mainly cos i havent had a chance to go out and hunt another one down here in the arse end of nowhere, and lo, the oil light definetely takes way too long to indicate low pressure when the motor has been stopped. this tells me that my analysis appears to be correct, the sender unit is actually on the wrong side of the filter, by design, mind you! | ||
| Andersonhdj |
So i source a new filter, fram, cos its obout the only thing easily available here, fit it to the xb9 and fire it up, fresh oil of course too. Oil light goes out instantly, cool, cut the motor, wait,wait,no oil light. switch off and on again,no oil light, repeat,no oil light. switch off, wait about a minute,switch on again, oil light on, start,oil light off instantly, repeat as before! So now i start thinking, okay, obviously we are retaining pressure here, the filter is not blocked, iv checked the supply and that is good. ok filter off, lets check the check valve, fetch socket, hangabout, the adapter isnt tight at all, unscrew and the checkball/bung and spring end up in my hand along with the adapter. Pattern on the bung shows that it was seated skew to the adapter at some stage, but i rather suspect that somehow some idiot managed to reverse the check ball on top of the adapter. So i removed the checkball temporarily, the filter has a check valve in it anyway and repeat the previous test, LO, when the motor is cut the light in back on within a second, as it should be. Unfortunately it's too late for the crank, will still have to open and inspect the damage nad make good! Comments please! | ||
| Ericz |
Do you know the oil pressure switch is good? You could be getting funny oil light behavior due to a bad switch. Verify the switch operation before you make too many other assumptions. They go bad all the time! | ||
| Andersonhdj |
It's not the switch and i'me not making assumptions, I've seen the inside of too many motorcycle motors not to know a bad design when I see one! Besides, I have tested my theory and probed and prodded exhaustively, but thanks for the input anyway! Actually, I've never seen a failed oil pressure switch on a jap bike or any other for that matter and it may be that, if it is as you say, it's because the switch is seeing unfiltered oil which could block it with sludge, which is one of the primary engine killers on bikes beside the usual stupidity of the use of silicon sealer instead of the correct grey sealer.Have seen lotsa jap motors destroyed by silicon.And lack of proper maintenance! |
