How many km before an engine rebuild?

[peanuteater]

just curious as to what sort of milagae peoples jave gotton out off 2 stroke 50 cc scooters before the engines need to get a re build?

[Spearfish]

I did 10,000 in a bit over a year and pulled the head and cylinder off. It was all mint except a bit of carbon.
At 30,000 isn't unusual for a Minarelli/Yamaha based one
Probably more for a geared one?
From the container to the landfill station for Chinese ones.

The 50s are so choked up with restrictions that they are fairly under stressed.

[SS90]

I concur with Spearfish on that one, 10,000km is nothing, and, with good oil I would expect to see even at 30,000km, only needing a set of rings, but with the price of a complete set of rings, piston and gaskets for the Yamaha/minarelli engines (aftermarket parts) at less that $120NZ, it is silly not just to throw a complete kit it.

As far as the bottom end goes (crank, mains), they will go for (at least) double that before needing attention.

The only thing you need to keep an eye on is the drive belts, pullies and rollers, often forgotteen, the are the second most important service item on an automatic scooter (the first being a good quality 2 stroke oil)

[davereid]

My TGB has just had a set of rings at 44,000 km. I run it on TOTAL T2 synthetic. Other maintenance includes regular air filter oiling, and exhaust dekoking. I have also had to ignore a fork oil leak for 20,000 km.

[DangerMice]

I run it on TOTAL T2 synthetic.

That's one you'd recommend? Where do you get it from?

I'm never really sure what to get. So far I've used the Yamaha branded stuff from the dealership and a couple of different ones from Supercheap/Repco. Has Castrol Activ in it at the moment cause that's all the Supercheap had when the oil light cast it's baleful glare at me as I was going past.

[UberRhys]

My TGB has just had a set of rings at 44,000 km. I run it on TOTAL T2 synthetic. Other maintenance includes regular air filter oiling, and exhaust dekoking. I have also had to ignore a fork oil leak for 20,000 km.

When I upgraded my cylinder kit, piston etc... I was reccommended by a few to run it in on natural oil rather then a semi-synthetic/synthetic. And to be honest I haven't ceased to use it. The Repsol Natural 2T oils has served me we so far...

[Dave Lobster]

Can we start a what two stroke oil do you use thread? :)

[Spearfish]

That's one you'd recommend? Where do you get it from?

I'm never really sure what to get. So far I've used the Yamaha branded stuff from the dealership and a couple of different ones from Supercheap/Repco. Has Castrol Activ in it at the moment cause that's all the Supercheap had when the oil light cast it's baleful glare at me as I was going past.

If your engine is standard use any JASO FC rated synthetic oil FD is better.(I'm not sure if the FD has more to do with smoke?)
The Yamaha oil is pretty good but being badged is seemed expensive for what it is.
44k out of The Golden Bee scoot says something for what davereid is using and how its looked after.
Don't use castor oil unless you drain your oil tank first it doesn't mix but your scoot will smell like the TQ midgets at western springs any others seem to be ok to mix.

[davereid]

That's one you'd recommend? Where do you get it from?

I'm never really sure what to get. So far I've used the Yamaha branded stuff from the dealership and a couple of different ones from Supercheap/Repco. Has Castrol Activ in it at the moment cause that's all the Supercheap had when the oil light cast it's baleful glare at me as I was going past.

I used to have a scooter shop. The shop is closed, although we still have the workshop going, but I put Total oil in as we were in the same building as the Total Oil guy, and we are mates.

I must say, I still use Total oil in all my vehicles, and I have never had an oil related failure - (except for a there is no oil failure).

Total Oil have outlets all over the place. http://www.totaloilsolutions.co.nz/contacts.php

I think that any quality oil is fine.

But as you will go 1000 km on a litre, synthetic is cheap enough to use every day.

I don't credit the synthetic oil with my bikes long life, it did the first half with an asian immigrant family, who actually had a baby seat on the back and a basket on the front when it came into the shop.

I sold it, then the fella came back saying "hey its done 20,000 km my mate say it must be fucked" So we gave him his money back, and he got a brand new Chinese scooter off trade me. It lasted 2000 km - one of the better ones. I will still service Chinese scooters that we didn't sell - one of the few workshops that will, but it quickly gets un-economic.

So the bike became a "loaner" and I have kept it ever since, cos I enjoy riding it.

[Spearfish]

I used to have a scooter shop. The shop is closed, although we still have the workshop going, but I put Total oil in as we were in the same building as the Total Oil guy, and we are mates.

I must say, I still use Total oil in all my vehicles, and I have never had an oil related failure - (except for a there is no oil failure).

Total Oil have outlets all over the place. http://www.totaloilsolutions.co.nz/contacts.php

I think that any quality oil is fine.

But as you will go 1000 km on a litre, synthetic is cheap enough to use every day.

I don't credit the synthetic oil with my bikes long life, it did the first half with an asian immigrant family, who actually had a baby seat on the back and a basket on the front when it came into the shop.

I sold it, then the fella came back saying "hey its done 20,000 km my mate say it must be fucked" So we gave him his money back, and he got a brand new Chinese scooter off trade me. It lasted 2000 km - one of the better ones. I will still service Chinese scooters that we didn't sell - one of the few workshops that will, but it quickly gets un-economic.

So the bike became a "loaner" and I have kept it ever since, cos I enjoy riding it.

You must have had a lot of repeat sales with an easy going attitude like that, I bet it tested your patience at times though.

[davereid]

You must have had a lot of repeat sales with an easy going attitude like that, I bet it tested your patience at times though.

We sold Peugeot and TGB... I dare say every one we sold is still going just fine unless its been crashed.

[Slicksta]

33000kms on my jog still going strong had a transmission rebuild only because it was ridden down 90 mile beach

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[5150]

so would 31K on a 4 stroke 125cc scooter be too much? How much would you expect out of this engine before rebuild needed?

[SS90]

so would 31K on a 4 stroke 125cc scooter be too much? How much would you expect out of this engine before rebuild needed?

Again, it depends on it's mainainance (or lack of) if it has had regular oil changes (many,but not all Honda,Suzuki,Yamaha (and most chinese) 125cc 4 stroke scooters have no replaceable oil filters ), so oil changes need to be often, and with quality oil.

If it has been maintained like this, and valve clearances are maintained as needed (light valve springs mean any carbon under valve heads will leak, making hard starting from hot, eventually burring valves out.

If all this is ok, and it doesn't burn too much oil (say 300ml very 1000km), then leave the damned thing alone, and just get it serviced as required.

[ICE180]

My 180sp 2T runner dropped a ring at 51,000km so at a total cost of $250NZD i got a NGF172 kit and put it in.

This was cheaper than a set of original piston and rings

and my scoot has been thrashed pretty much its while life Running Semi synth 2T oils of all sorts
so If you do Basic Maintenance on them they should last a long time mine did