Triumphrat

yasharnazi@hotmail.com · 01-30-2010, 09:16 PM

I have a 2002 tt600, and i've actually written about his problem before with not much luck. The airbox fills up with so much oil that it leaks out on to the motor down the fairings and onto the ground... and occasionally the oil from the airbox gets into the cylinder chamber causing blue smoke from my tailbike. I spent the morning taking the tank, fairings, and airbox off for the 3rd time to try and find the problem. I found that the oiliest hose of all going to the airbox is the one that goes to the "Reedvalves" on the cylinder head. Item # 24 on bikebandit.com in the cylinder head category for 2002 tt600. I haven't taken the reedvalve off yet as it seems i'll have to maybe drain the cooling system and get the radiator out of the way. Does anyone have any information if a reedvalve can actually leak oil thru if it gets old or something? I'm tired of how messy this bike is with this problem. Any help would be appreciated. thank you.

BombFactory · 01-31-2010, 12:57 AM

No, the secondary air injection (SAI) does not have anything to do with the oiling system. The problem is that the centrifugal breather seal, and possibly the breather itself, has failed, allowing oil to escape past the seal and get into the airbox via the breather hose (located on the right side engine cover by the clutch cover).

yasharnazi@hotmail.com · 02-05-2010, 06:37 PM

http://www.bikebandit.com/showschematic/m17598sch565618

If i wanted to replace everything related to this problem in this photo... which items would i replace... because that oil seal just kinda seems like an engine main seal... no? I'll try and post photos. So Even tho there's oil in the other hoses, I need to remove the right engine cover and replace...

Thank you.

http://i17.photobucket.com/albums/b9.../triumph11.jpg

http://i17.photobucket.com/albums/b9.../triumph12.jpg

http://i17.photobucket.com/albums/b9.../triumph13.jpg

http://i17.photobucket.com/albums/b9.../triumph14.jpg

http://i17.photobucket.com/albums/b9...-0606-2440.gif

http://i17.photobucket.com/albums/b9...4/triumph4.jpg

BombFactory · 02-05-2010, 08:36 PM

Yes, your photos are correct for the breather hose. It doesn't matter how much oil is in/on any of the other hoses, as the oil can only get into the airbox via the breather hose.

The seal is a standard industrial shaft seal. You'll want to replace #18, and you may need to replace the metal gasket, #16. The centrifugal breather may need replacing too, if the shaft is worn or damaged, but I don't know where that is located on Bbandit.com. I know the dealership can get you one, and they are supposedly a better design that the stock one.

JasonPSU20 · 08-31-2010, 09:00 PM

I have the same issue, oil in the airbox, however mine doesnt seem to be as bad. I called the dealer and they have the two gaskets and the breather in stock, $130 total. However they said that oil in the airbox can occur from over reving the bike or riding in extreme heat (they claimed it can vaporize the oil and cause it to enter the airbox). I know that the last time i rode the bike, before taking it apart to fix a seperate leak issue, it was roughly 85-95 degrees out and might have reved up to about 10k on occasion. Is the dealer full of it and i should replace the breather and gaskets? Or would i be ok with just replacing the gaskets, or just put it back together and try driving again?

thank you

BombFactory · 09-01-2010, 12:50 PM

When you say gasket, are you talking about the breather shaft seal? Changing the breather cover gasket will do nothing to stop oil from getting into the airbox. The breather disc and seal stop that from happening.

I think the dealership is throwing around wild advice if they're telling you that the oil can vaporize and pool as liquid in the airbox if you ride in hot temperatures or "over" rev the engine. First off, you cannot over-rev an engine with a rev limiter, assuming that the limiter is set at the appropriate rpm. Also, the temp on these engines rise to 225F and even 230F all the time, which is just about as hot as you will get them with a healthy cooling system (they can see 235F in very hot conditions, but this is less common). Even with hitting those temperatures, there should be no oil pooling in the airbox.

If your dealership is in fact misleading you, I would purchase the parts on bikebandit.com and take your motorcycle to another shop. You may need to have the breather disc changed along with the seal, as some earlier designs have too rough a finish on the shaft for a good seal. It is an easy enough job that any motorcycle mechanic should be able to do it, and it is a system used on other makes.

MatRin · 09-04-2010, 01:33 AM

As crazy as it might seem, I have noticed that on really hot days (we're talking high 90's) my speed four will get oil in the air box. Not a huge amount, but enough to notice. On the cooler days I don't see any signs of it... Just the hot days. Maybe the dealer is correct in some way?

spacebouncer · 09-26-2010, 08:08 AM

I've got an 00 TT600. It always used to have a slight oil leak but wasn't usually too bad so i didn't think too much of it. Eventually, it took its toll and a valve blew. Took the head off etc, couldn't see any damage, so figured it went straight out the exhaust. Replaced the valve. Put her back together, but can't deny the oil leak was a little worse.

So took her apart again. Guessed the crankcase must be being pressurised somewhere. Thought i'd check the rings and liners, make sure there was no gap, but seem perfectly within limits. Mating surfaces and gaskets all seem fine.

So my questions are

1. Has anybody replaced the breather disc? Any improvement over the stock? problem solved?

2. Any other suggestions or common mistakes I may have made taking the engine apart, that may result in a bigger leak?

3. Also happened to notice that the thrust washer that goes under the valve springs (at valve head end) was only present on one of the valves. I figured they're only serving to prevent scratching etc on the cylinder head. They're about $8 each so I wondered how necessary they are.

Thanks a lot for any help.

Will · 09-26-2010, 02:39 PM

1. Yes, this is generally the solution.
2. No, it is probably the breather.
3. Your engine head is aluminum and the springs are steel. The spring will eventually dig a hole in the engine head without the thrust washer.

Those are my answers to your questions, and others may have better answers.

JasonPSU20 · 09-27-2010, 07:39 AM

I have replaced the breather, the breather seal, and gasket, and so far have had no issues. I also used some Toyota FIPG to seal the airbox together (and a little around the cam cover to fix a slight leak there). So far she is dry with a few hundred miles on her.