Hey all,
My kids 2004 90 started having an oil leak out of the exhaust pipe where it attaches to the motor.
Took it to the dealer, they said it had a bad gasket..... ok, they ordered the part and said it was done.
Picked it up today, it is down on low end power and there is alot of oil pooling up at the tip of the muffler.
When I picked up the front end to look underneath it, there was oil coming out of the muffler.
It also won't idle hardly at all.
Loaded it back up and took it back to the dealer.
They said it just needed to be ridden and it was "loaded up". I said I understand 2 strokes and how they can load up. I had ridden this one for 30 minutes and made sure it was cleaned out.
It was still running like crap.
I suggested it might be something wrong with the oil injection.?
Any thoughts?
I have 2 months left on the warranty, want to get it fixed.
Sorry about long post, just wanted to give all the details.
Thanks,
Linc

 

If you are also using 50:1 pre-mix for the 1st tank of gas in addition to Oil injection, then its engine and pipe could "gum up" with oil very quickly. Especially if your young driver is only "put-putting" around your yard. If wondering, 50:1 for 1st tank of gas is the suggested burn-in formula for our Pred-90. If running normal gas with oil injection and you want to get a fresh engine baseline, you may want to change its plug and do a plug reading every 15 minutes. If the new plug starts out as "beer bottle brown" and gets darker and darker, the oil injection system is probably pumping in too much oil.

To learn more about reading plugs, surf - Press Here -


If your young rider is "put putting" around the yard, its engine may NOT build up enough heat or "high" air flow to blow the carbon out of its engine & pipe. As a suggestion, replace with a Spark Plug that has a "P" within its coding. Could also go with a little hotter plug as well. The "P" & hotter plug is great for those city driving type of conditions. If your round rider is reving its engine up / down a lot, then stay with the non-P and normal heat range plug. Using a "P" and high heat plug in high reving engines does more harm in the long run...


Hope this helps...

 

Thanks for the advice.
We ride at the dunes so it is wide open all the time and in sand. Sand sucks ALOT of power, so I can definetly say it was running nice and hot.
The bike is on its 2nd fill of injector oil and also it has been through about 4-5 tanks of gas.
We will see what the dealer says.

 

Yes, sand (and deep mud) does suck the power out of any engine. Once your unit is off warranty, its time for engine upgrades. There's lots of things you can do to an engine to give it more bottom end power. I'm sure you're already planning a few performance upgrades.

Since your young rider is doing lots of reving up/down (on the sand dunes) and you're still getting too much oil into its pipe, I would suspect its factory oil injection system is pumping out too much. Hopefully, your dealer can tweak its injection flow rate and get your unit's spark plug to return to a nice beer bottle brown.

If wondering, I removed the oil injection system (and white wheel) from my son's Pred-90. Now, I control the amount of oil that goes into its engine. This removal also gave me a giant "piece of mind". re: If it's getting gas, I know its also getting the proper amount of oil. Perhaps after your warranty is over, you may want to consider removing its oil injection system as well?

.

 

There's got to be a problem with the oil injection,even idleing around slowly there shouldn't be oil dripping out the pipe.There is no way if your riding flat out most of the time that oil should be dripping off the pipe.The pipe should be hot enough to burn it all away.Also make sure the pipe is sealed properly at the head.Backpressure is critical to how well a two stroke runs and a leak at the cylinder will affect performance,it may even lean out the bike enough to sieze it up.If you remove the plastic cooling shroud that covers the engine on the right hand side(its easy only two screws and loosen the fender bracket) you will be able to see the injection pump and its cable.Perhaps the cable is stuck at the connector with the throttle cable or something keeping the pump wide open.Just one other thought.Is it just oil thats leaking out or could it be fuel as well? I'm wondering if maybe you have a carb problem and its running way too rich?Put your hand behind the pipe when its running.Is the exhaust flow coming out good and strong?(I'm curious if the dealer put the gasket on correctly or if the pipe has a blockage).There is also a bolt in the bottom of the muffler you can remove if you suspect the pipe may be blocked up.I have a pic of our Vipers engine with the shroud off showing the oil injection pump if you need it.

 

Talked to the dealer today, they don't think that there is any adjustment for the oil injection system. The guy that sold it to me is a regional Eton Rep and gave the dealership the name of a mechanic on the east cost that builds these bikes. They are going to give him a call in the am.
They tried to give me a line saying it was because I had the throttle turned down for my kid.
I didn't buy it.
Eton Rep said worse comes to worse, he will give me a CDI box off of an 05 which I guess you can adjust?
Heck, I might see how much cash + my 04 he wants and just get an 05. I understand they added alot more stuff on anyway.
Or I could keep my 04 and get rid of the oil injection all together and use premix that I use in my Banshee.

 

Sounds to me like you've got a crappy dealer.You can ride that thing around at an idle all day so don't let them try to tell you that its because you have the throttle screw turned in.No the oil injection does not appear to be adjustable but what your describing is certainly not normal behaviour for one of these bikes.If you want to remove the oil injection that is your choice but you shouldn't be forced into it as a fix for your malfunctioning engine.There aren't any differences on the standard 2005 90s that I'm aware of other than the adjustable CDI box so I wouldn't pay a whole lot more for that.I'm still having a hard time believing that there is so much oil going into the engine that it is dripping out the tailpipe.Is the bike smoking like crazy?Fouling spark plugs by the truckload?Is your oil level dropping very quickly?The oil injection cable is not threaded and secured by nuts like you'd normally see on larger bikes or snowmobiles.It just sits in a little collar and the spring tension from the pump lever holds it in place and then it is protected from harm by the plastic cooling shroud.It could easily have been pulled out of place and maybe now has the pump cranked wide open at all times,did they have the shroud off when they replaced the exhaust gasket for some reason?I have heard of pumps on snowmobiles occasionally malfunctioning and pumping way to much oil,or sometimes not enough but it is pretty rare.If you are sure that the problem really is too much oil and the cable is in the proper place and moving the pump lever the correct way(pump arm isn't sticking or something) then I would insist on a new pump.Remember this right side plastic cooling shroud is only held in place with two screws so you can remove it and investigate the pump and cable in about two minutes.Tell the dealer you would like to take a look when he takes the shroud off.Don't let the dealer talk you into some other mickey mouse fix.Make them fix the bike properly the way it was supposed to run from the factory(unless he will replace your bike with a new one).

 

oldyeller,
Thanks for the input.
Dealer just called and said that the guy from Eton on the east coast is not recommending adjusting the pump at all and says that it is probably due to the throttle screw being turned in.
I doubt the dealer even called and talked to him.
Dealer is trying to tell me that I should turn the screw out and ride it myself to burn off the excess oil.

Does anyone have any pix they could send me to point to what I am looking for?
I have no problem taking the shroud off and taking a look.

I might haul the bike to another dealer and see what they say.

No, the bike does not smoke alot once it is running.
I haven't pulled the plug yet, figured the dealer could fix it.
I will pick it up and take my kid out over the weekend and see how it does.

Keep the input coming.
Thanks
Linc

 

Lincster check out my pics at http://community.webshots.com/user/oldyeller106 Look in the pictures of the viper.There is a picture of the engine with the shroud all removed as I was exchanging the cylinder head for racing purposes.In the picture titled"engine" you can see the cable looping down into the pump.Look closely at how the outer cable just sits in the bracket and the inside cable loops around the little arm.Make sure the spring is in place that pulls the arm back.Have someone work the throttle or you might be able to do it yourself and make sure that everything looks to be moving smoothly and returning all the way.If the bike is really getting that much oil it should be smoking like crazy.I'm wondering if you have some kind of carburetor problem and the bike is getting way too much fuel.The choke isn't on is it?This one can be a little tricky until you get used to which way it goes.It goes to the left as you sit on the bike to turn it on and to the right to shut it off.By all means turn the screw out and drive the snot out of the little thing but I don't think the screw is your problem.The pump is not adjustable.If it was the cable would be threaded so you could pull it out or in further.If you have another dealer close I would take it to him.There are three screws that I mentioned that hold the side cover on(I forgot about one in my other post).There is a big sort of self tapper type screw that joins the two plastic parts of the shrould together and then two more around where it sucks in the air for the cooling fan.It also kind of clips into the other part of the shroud that goes over the cylinder from underneath(take a look and you'll see what I mean once you loosen the screws.You may want to take the screw out of the back of the front fender to give you some more room to take the shroud out of your way.Good luck and keep us informed what going on.

 

You gotta be kiddin me!!!!
I pick the bike up tomorrow, but I know the choke was all the way to the left. That means it is on!!!! No wonder it wouldn't run right. It has been like that for a while.
Darn good little motor to run like that.
I will post back tomorrow after I pick it up, but I am sure that is it.
I feel like an idiot.
Thanks for the help oldyeller.
I do plan some upgrades and will be contacting you about them.
Thanks again.
Linc