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Author Topic: lt 500 runs rough and throws some oil  (Read 677 times)

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lt 500 runs rough and throws some oil
« on: June 02, 2015, 11:06:19 am »
Hello I'm michael

I'm brand new to this site was wanting some help figuring out things and have a few questions.

I'm not real familure with everything on these bikes in fact my as well say I hardly know anything I know what the basic parts are but I want to ask some stuff and location of stuff just to be safe and make sure I don't put the wrong things in wrong places.

1.  There is not a place to put engine oil in correct since it 2 stroke I mix it in the gas I say this because a buddy tried to tell me it needed oil I didn't agree their is gear oil thowe does it go in the screw off part on right side of bike toward the rear I say right meaning if you were standing behind it looking forward and on the left side their is a switch knob looking thing I wonder what it's for I'll take pics and share them in a bit.

2.  The site gauge is for power valve correct?  How do I look and see if it works what do I look for?

3.  And now for issues bike starts fine 2 or 3 kicks not matter how long it sits I found it sweet spot  but in neutral does not Rev much and stutters when trying to fully open throttle in gear if I just gun it it sputters a little in first.   

In 2nd It starts to clear up and power band opens then it goes from a stutter to you better hold on or die up through the rest of gears for most part but it still doesn't scream like I think it would but it does still haul ass but their is a delay when opened up and I don't think it's rpms are nearly as high as it should.

I say this because when it gets low on gas It becomes crazy scary when it low on gas if I barley give it throttle meaning just a mere tweak in the twist throttle it's like screaming cheetah ready to eat me it becomes very sensitive to touch it revs extremely high and eventually starts idling up to where it sounds opened up but if I twist throttle screams even more at this point I'm holding clutch and killing it because I don't want to blow it up or me ...

4. There is lots of oil in pipe and seems to leak some where fatty pipe connects to front of engine the pipe is brand new has been ridden 5 short times with it on its already showing lots of oil in it and where silencer new as well meets pipe the connection point has oil around it I have the stock rubber sleeve over it it wore out I resorted to zip ties holding it in place if not it goes sliding back and forth.

5.  I don't know anything about jetting or fuel to air mix where do I have to go at on it to adjust these I know where jets are don't know which jet is Which. Thowe usally the main is the big one.   That's all I know.

I'm sorry for insanely long message I like to explain everything at once thowe and will appreciate any advice I'm Given.   I live in texas and these quads are rare around hear which means good mechanics are rare too.   I don't trust a lot of people with this quad unless they have good experience on these quads I took my other quad to someone hear in town it sit for 1 yr and became a damn parts quad for him and came back worse then when I sent it.   Still haven't got it strait either.  I also wonder if I may need ignition coil and spark plug maybe even reeds ignition coil the part that plugs on spark plug the metal piece falls out,  I have to shove it in the right place but every time I remove it, it falls off so I think it could be cot ribbing to problem.  Have not checked reeds was gonna take them out to look when I changed exhaust but those bolts were in tight and did not want to break them but any ways any advice would help thanks

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Re: lt 500 runs rough and throws some oil
« Reply #1 on: June 02, 2015, 01:05:20 pm »
If your spark plug wire is falling off that is a problem and should be replaced.
Check the compression.
Clean the carb and check the main and pilot jet sizes.
06 Raptor 700 (EFI)
Lexx 46mm race tip
pro design air filter mod
Power Commander V

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Re: lt 500 runs rough and throws some oil
« Reply #2 on: June 02, 2015, 01:57:49 pm »
How do I check compression the right way I know when I kick it wrong and it backfires the kicker tries to kick my foot off

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Re: lt 500 runs rough and throws some oil
« Reply #3 on: June 03, 2015, 06:30:16 am »
Remove spark plug, use a good compression tester (where the valve is in the tip), thread in tester the same depth as the plug. hold throttle wide open and kick till tester stops moving.

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Re: lt 500 runs rough and throws some oil
« Reply #4 on: June 03, 2015, 06:33:32 am »
The back firing issue could also be an issue with timing.

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Re: lt 500 runs rough and throws some oil
« Reply #5 on: June 03, 2015, 10:08:55 am »
Lewdog, i did some formatting to help make reading it easier.  I'll also move the thread for you to it's appropriate section.

We will need to know more specs about your bike.

What aftermarket items do you have on your bike?

what oil/gas ratio are you using?  What oil do you use?  What type of gas?

What jet sizes are in the carb now?  Needle position?

What air filter?  Are you using the airbox?  Does it have it's lid?

What's the compression?

Im sure im forgetting to ask some things too.

 +k2 D?


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Re: lt 500 runs rough and throws some oil
« Reply #6 on: June 03, 2015, 04:46:22 pm »
Well thanks for reformation it does make it easier I'll try to not bunch up any more ..


OK as far as after market it don't have much
It has a twist throttle . And fmf pro series pipe and fmf turbine core exaust/silencer .
I think it's a kn air filter really not 100% sure it came with bike when I bought it will post in pics I'll come up with more answers later

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Re: lt 500 runs rough and throws some oil
« Reply #7 on: June 03, 2015, 04:59:31 pm »
I put in super unleaded gas 93 octane I don't have a place with 103 racing gas so it's what I kinda am stuck with I have seen octane boosters but have not added to gas didn't know if they hurt or help engine for these quads

OK the oil I use right now is actually I think meant for for more water craft 2 strokes like my seadoo but it does show picture of quad and dirt bike and states for high output  2 cycles I'll have to get a bottle and see exactly what it is I read somewhere someone using something simular I have not found the one most people say they use on these quads at Wal mart or the auto places the closest quad place is 40 miles or online. I've mixed 100 to 1. 75 to 1 and 50 to 1 even 30 to one  100 to 1 seemed to work best performance wise and smoked less 75 to 1 was good to the rest it smokes alot

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Re: lt 500 runs rough and throws some oil
« Reply #8 on: June 03, 2015, 10:00:00 pm »
I put in super unleaded gas 93 octane I don't have a place with 103 racing gas so it's what I kinda am stuck with I have seen octane boosters but have not added to gas didn't know if they hurt or help engine for these quads

OK the oil I use right now is actually I think meant for for more water craft 2 strokes like my seadoo but it does show picture of quad and dirt bike and states for high output  2 cycles I'll have to get a bottle and see exactly what it is I read somewhere someone using something simular I have not found the one most people say they use on these quads at Wal mart or the auto places the closest quad place is 40 miles or online. I've mixed 100 to 1. 75 to 1 and 50 to 1 even 30 to one  100 to 1 seemed to work best performance wise and smoked less 75 to 1 was good to the rest it smokes alot

A two stroke is suppose to smoke.  The only oil the piston, cylinder wall, connecting rod bearing and main bearings get is what you put in the gasoline.  No smoke means very little lubrication for the engine.  Why not run the transmission without the drain plug, I guarantee the engine will make more power until the transmission seizes up. :))

If you get your carburetor working correctly you can run the fuel to oil ratio 20:1 without plug fouling problems if you ride it hard all of the time.  There are some good articles about oil ratios on this forum.  If you want to learn about oil ratios and dispel the folklore I think you may have been taught.  Do some searches on this forum. ;)


Oil ratios is a common topic for those that do not have much experience with two strokes.  The high fuel to oil ratios is going to eventually create some expensive repairs.  We are just trying to keep you from making the mistakes most of us have learned the hard way.

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Re: lt 500 runs rough and throws some oil
« Reply #9 on: June 08, 2015, 02:12:18 pm »
Do yourself a favor and get the best advice from the source, get a factory service manual, 1 mistake will easily cost more than the manual which you will have to get anyways when you blow up the engine because of misunderstood advice. Maybe a short read of 2 stroke engine basics to get the "big picture", it will help you understand why your engine failed if you don't get a service manual. At least the manual will help your engine vocabulary when asking questions online, remember.... people can only answer what they "think" you are asking whether the advice is correct or not. Lee

 

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