Poll - Torque limiter failures on 449/511

I have 73.2hp at the crankshaft and I have not been able to spin the TL as of yet. I will see if I have time tomorrow when I run by the shop.

Do you have the BMW fixture for testing your torque limiters?

#2 & #3 in the image below.



You'd be suprised how many shops have these and don't even know what they are used for...

Please forgive these bad questions ...but this is turning into a Herlings thing to me now ...What is this TL?

--

You are insinuating that your TL is not slipping but it might slip and that is OK if it does slip ... ...What is actually being protected when slippage occurs?

Sounds a little bit like car insurance ... We all gotta have it but you can't use it very often...

Oh man, you missed out on some good Mckay bashing Tinken in past and telling everyone I was crazy and the TL never slipped...

The torque limiter, the limited slip differential for the Kymco engine. It's a good thing and it keeps us from breaking. But adding more than double the load and without proper cooling, causes it to fail. There is no direct oil cooling for the device, only oil level and splashing makes contact with cool oil. The crankshaft compartment is another oiling hurdle. Modifications have been made to the engine in this area by Kymco, but there just isn't enough flow. Running the thinner oils really increases the survival of these components in this area.

After about 500 miles of racing we would loose either a rod bearing and/or the torque limiter. After removing the TL for inspection, the pressure disks had lost all of their tension and were bendable like soft aluminum. The combination of blow by gasses and friction from slipping - heats the disks well into the annealing range. If left unchecked, the torque limiter eventually looses it's head spacing and flies apart (such as Malcolm Smith's did at the NORRA2012).

http://www.cafehusky.com/threads/449-511-torque-limiter-failures.32792/

Unable to rectify this issue and with no help from BMW, Ty gave up on racing the 449 early on due to the TL failure rates while racing and focused mainly on the 310s. This is where I came in.

I invented this and everything changed for the Kymco 449.

With the addition of the correct oil quantity and storage height in the right clutch area, the torque limiter was able to run at cooler operating temperatures from increased oil splash. Thinner M1 0W40 flows almost twice the quantity at ambient temperatures, almost double at higher temperatures compared to the 10W50/60 oils that many people were using when I joined CafeHusky. And this is without internal oil mods such as the Zipty crankshaft gallery mod which nearly bullet proofs the Kymco engine from further failure.

How often does Ty have these break after the mods? Obviously there is a servicable life on these, just wondering how long that life is extended after the mods.

When should I keep an eye out for mine breaking with these mods done from almost new?

How about a picture of one of those Torque Limiters that you have that everybody who ever owned a G450X or 449/511 has been waiting for that has the acid etched Newton Meter rating upwards of 320 NM like you were saying. Please. I'm aware that they did have a later revised part number for the later so called upgraded replacement Torque Limiters.

Like I've said and included pictures of myself. I've never seen one with that high of a number and they are all acid etched marked with the breakaway point right on them when assembled.

You can almost read the marking on one of them that is pictured in your boxes of them from your earlier posts on the torque Limiter failures. What gives? Picture please. So we all don't go to the dealers and buy these parts with low Newton Meter rating numbers. Like we all would have to accept what ever comes out of the box when buying a new one.

I'm not at work yet and I have no idea what is etched on the torque limiters. The numbers I quoted you were from measuring them myself in the torque limiter jig.

IF it is slipping constantly it will cause it to wear out like riding the clutch all the time.

If you get it to have a higher holding force, it will slip less, thus less heat generated and will last much longer.

Right? Also the specs on the torque limiters are definitely not etched on after being tested. These things do not cost nowhere near enough to warrant individual testing and marking like they are "hand aseembled". These parts are pumped out by the thousands and they likely batch test them. I would assume the number posted on the torque limiter is the minimum service rating of the torque limiter for the particular application that it is intended for.

Sound good? Or am I totally off base here.

My new design is not a limited slip clutch, contains no clutch plates and will not be effected by heat.

Its a dampened compound flex/shock absorbing joint...like the back of a clutch basket.....................( I have no ffffing idea what it is)

whoa.. tinken likes?? hmmmm

Cush-drive off a DT175?
Lol

I'd say the higher the torque limiters holding force, or breakaway setting. The more damage could be actually done to the transmission gears then with regard to shock to the 6 spd. boxes especially.

I'm not the Lone Ranger!

I have 5 spd gear boxes.

Tinkens "WR 511" does too.