Hi.... Whats the normal oil consumption on a stock 103 motor thats been run in and ridden pretty normaly not up it all the time? The bores were honed about 3 or 4 weeks ago during the re-install of the stock pistons replacing the SE hi compression ones that were in it. The motor has 7 thousand ks on it from new. 

Thanks

Everything being normal there should be SFA oil consumption at 7000K

But if yours is using oil, i would think that maybe the hone job wasn't up to scratch and, or, the new rings weren't bedded in correctly. ?

thanks, How does the air cleaner make the bike use oil? I have a heavy breather. I was led to believe that a new motor or a honed and re-ringed motor will use oil till it beds in after a thousand ks or so.....Oh from 7 thousand Ks it should use SFA oil?

oil expander ring overlapped?

pull ya plugs and see which one is fouled up, post a pick of the plugs

I'll check the plugs. I topped it up to the full level and set the trip to zero. I'll check what it used after 1000ks. The dealer said 3 to 4 hundred mil in a thousand ks is cool, but anything up to 500mil per 1000ks is acceptable.

If your rings haven't seated properly in the first 100km, they likely never will.
In normal use, the oil level shouldn't drop to a level that you need to actually add any between services.

So you're saying it will drop on the dip stick in the 8000ks between services but will stay within the low and full level marks?

To clarify, I wouldn't expect the oil level to drop more than 5 mm on the dipstick.
I use 5000km max' service interval.
I like to see the oil level just below the full mark when hot.
Keep in mind, they can be a bit variable as to the level indication, just stick to the same routine each time.

did ya pull the plugs

speedy is right , bores bored and honed ,with correct stones will  run in with in 100 ks or 1 hr running at most loads last , , the 103 pison is very short in lenght compared to bore diametre, so stabilty not good as say 3..500 bore , 4.250 stroke evo , oil burning over time is normal , valve stem seals wil also allow oil usage with out showing blue smoke signs from pipe , i dont run my own engines for longer than 1/2 hr light oil , new filter ,and then tuning and full noise begins , havent had any oil burning issues , then penrite hpr 30 oil for rest of services , no eng isssues in last 18 months , 35 eng builds in that time ,  8000 ks to much , 5000 is what i consider to be limit , just my thoughts , your eng , do as you like , cheers

Hi,

7000kms bored and honed to refit stock pistons amazing, a lot of hands working on the engine

Thanks
Robots

Hi,

I got 1996 toyota lexcen, 252,000kms, change oil every 15,000kms, internal combustion engine going strong as, the motor in bike just the same, or your whipper snipper, chainsaw, lawn mower, 8000kms easy, paranoia

Thanks
Robots

there is getting to drugs on  this site LOLO

Your a legend Robots, 8000kms on your lawn mower ......wow !
I tried to find the oil drain plug on my chainsaw and whipper snipper, but ...........

p.s. I'm sure were all very happy for you that you have a 1996 toyota lexcen

PaulT, So was this engine using excessive oil before the hone and piston re-fit,,, or has it changed since the hone & re-fit ?

I'm assuming the SE Hi Comp pistons were fitted when the engine was new ? and for some reason the stock pistons went back into it.

You asked < .Oh from 7 thousand Ks it should use SFA oil? > what I suggested was that an engine that has only done 7000 k's from new shouldn't use SFA,

comptest, leakdown

My 103 didn't like syn3? Used a couple hundred mills, per 1000km from the start. Switched to standard HD360 mineral oil at about 3500kml and not a dtop used between 4000km services since? Bizarre, yep, but that's the truth. Now at 21000km and doesn't use a drop. All highway kays thiugh???

Good luck, hope you find a fix.

I think I was being paranoid, Ive done 500ks since I topped it up to the full mark and so far it hasn't used a drop. I'll watch it for the next 500ks, then it goes in for its second service. I'll get them to do a comp and leak test for the hell of it just to check. I use Amsoil, mineral or synthetic shouldn't make any difference to oil consumption hey?

Mine tends to use more around town riding, Not long ago did 4000 k's in 5 days and used maybe 2-300 ml.  Can't comment on the difference between Synthetic and mineral. Only ever used mineral. too much witchcraft in synthetics lol.

You're probably right on the paranoid bit, The harder ya look the more you see even if it's not there.

ALL engines use oil NO engine is 100% efficient. If you don't have to put a bit of oil in occasionally something is wrong. Having said that you should not have to fuel up and check your oil every stop.