Scooterotica

a.j wrote:I dunno..al I know is Halfords do sae30 two minutes down the road from me & its a lot cheaper than st90 from our local dealer 30 miles away.

Found this from another forum ''sae30 is nearly the same viscosity as st90 (about st85), sae 90 and st 90 are different
you want a jasoMA rated oil, im led to believe 10w40 is fine''

Jaso MA is accredited to motorcycle engine oil, for use with a wet clutch. So you could use a 10w/40 engine oil in a lambretta or Vespa as long as it is MA or MA2. It isn't preffered because the additional additives would serve no purpose. SAE30 engine oil is classed as classic engine oil, because it is lacking a lot of modern engine oil additives. As important as the viscosity is the additive pack in the gear oil, this is shown on the bottle by a GL number. For example St90 Rovck Oil is a GL1, which is very basic additive pack, anti foam, anti oxidant. Maxima MTL and Castrol ST90 are GL 3, which offer a more chemical protection to gears etc. GL3 is probably the limit in scooters as any higher could effect yellow and silver metal parts, not clutches.

a.j wrote:http://www.scooterhelp.com/genmaintain/ ... hange.html

Says different here mate.

I know, it's wrong.

Ok fair enough. lol.

Have a look on the same scenario for the vespa page at http://www.scooterhelp.com/genmaintain/ ... hange.html

you'll see it says St 90 for the vespa too :-/

Jazzy wrote:It seems there's nothing more emotive than oil.
Heaven forbid you mention a view different from that the Innocentis.
I did hear some use transmission fluid but when I repeated this out loud
a Fatwa was served on me.
Be carful out there.

Doubt it the Indian SIL engines used to arrive with transmission fluid in the chaincase so they are hardly likely to invoke a F*twah (don't want a visit from team America world police) As far as the viscosity of SAE 30 and ST90 is concerned, I'll take the 5th on that having been shouted down before on this subject. Just try buying some of each and see which you think is thickest

I have been informed that in the karting world, it is common practise to use Automatic Transmission Fluid/power Steering fluid in the engines that use wet clutches, it is thinner and will find even the smallest gap to eascape from, but makes for smoother and better gear changes and clutch use.

Or at least, that is what I have been told,
Any Karters on here??

Shaun.

Just found that some bike racers use it as well,

"ATF +4 is for Chrysler vehicles. The ATF +4 specification works the best. I know some of you are already freaking out. I have run automatic transmission fluid in two strokes transmissions since 1975. The factory teams used ATF too. The gearsets and clutch are a big rotating mass, and the thinner weight ATF will add some power. In 4th and 5th gear, you can feel your bike pulling stronger. Shifting in cold weather will improve too. You can abuse your clutch all day long without it singing. The YZ clutch friction plates are a lot like the clutch bands used in car automatic transmissions. Car transmissions take 10 times more abuse than a bike! The ATF will run cooler and provide excellent shifting and clutch performance. Change the ATF every other weekend of racing. I always use quality brands of ATF like Quaker State or Pennzoil. Do not use synthetic ATF! "


Google reveals that quite a few people use ATF in there gearbox's.

Just wondering what I should try it in.
Got a 135 Malossi thats due an oilchange

..SAE30 was a printing error...? A well established dealer I know puts SAE90 non EP in every G'box...

Have to admit I have put automatic transmission fluid in a vespa gearbox before