TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: PORTED R on September 13, 2014, 12:19:58 PM
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Im starting to believe my motor is cursed
Well not really but its always something
I went out to fire up the old girl for a quick ride just to shake off the dust
And it won't stay running after I turn the choke off
Just bogs out and dies
It starts first kick every time
I thought I got rid of this issue ,my 310 would do this from time to time
And now the 370 is doing it
Would air bubbles in the fuel line cause this ?
Reeds not Workin properly ?
I always use the best fuel,oils ,spark plugs ,hardware on my bikes
But for some reason this motor hates me
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Could it be an unforeseen reason? Like some bugs made nests in the carb vent line holes? As gas dries up it does leave oil behind. Take it for a good ride and get all that unused oil out of their. Replace spark plug if you have too.
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Check your gas cap vent.
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Sounds like a gummed up carb. from sitting. Do you use any fuel additives like Sta-bil to prevent this? I would check the quick and easy things mentioned above and if no luck clean the carb and start using a fuel stabilizer to prevent it from happening again.
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Are you using the same carb on the 370 that you had on the 310? Disassemble it & shoot carb cleaner into every hole & make sure its coming out the other end.
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I will check all soon
Yes same carb
I'm thinking its a gummed up carb
When I installed the 370 I pulled the carb ,cleaned it ,ran fine at the drags then a beach trip
My last trip out was 4th of July ,so the carb could be dirty from oil residue
So my next question is ,anybody else have issues with klotz super tech gumming up carbs in a desert climate
Fuel is vp 110 sealed can
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Im starting to believe my motor is cursed
Well not really but its always something
I went out to fire up the old girl for a quick ride just to shake off the dust
And it won't stay running after I turn the choke off
Just bogs out and dies
It starts first kick every time
I thought I got rid of this issue ,my 310 would do this from time to time
And now the 370 is doing it
Would air bubbles in the fuel line cause this ?
Reeds not Workin properly ?
I always use the best fuel,oils ,spark plugs ,hardware on my bikes
But for some reason this motor hates me
It sounds to me like the pilot jet or the transition holes the pilot jet feeds is plugged up or partially restricted.
This is a common problem when using castor based two stroke oils.
The carburetor should be drained if the bike is going to set more than a week or so to help minimize the problem from occurring.
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yes i would say the pilot hole is restricted. same thing was happening to mine when the fuel sits in the carb for a while. for what ever reason its viscosity is increasing. remove the pilot and blow some air through it and the pilot carb passage. it should run fine again after that. what ive found to eliminate this problem is turn the fuel valve off and run the bowl mostly out of fuel.
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some advice for the new guys or old guys. if the engine wont run with the choke off you can be sure the pilot is not allowing enough fuel to pass. either its clogged from the fuel sitting in the carb like the problem i was having or possibly from debris but if you have a good inline filter youll never have a debris problem or the pilot is simply just way to small. it should be easy to figure out which of the problems you have
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Klotz in the dry hot climate, can't say. Klotz in the hot humid climate, never a issue for me. What type of air filter do you run?
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fred, klotz is a broad term as they make several different oils. with the castor stuff and some types of fuel i can gaurantee youll see syrup in your float bowl after a short period of sitting. which makes the engine not run with the choke off. sounds like jerry has seen this as well. didnt take long to figure out the best aproach for this situation is not let the fuel sit in the carb. problem solved
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I was referring to the super techniplate. I respect Jerry's opinion. Maybe out west you see those results. I personally have never had my mixed Sunoco 112 and super techniplate produce a syrup, after sitting for long periods of time. Peace! :Boobies2:
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Found a blocked pilot
,I need to start draining the carb for storage
Airfilter is a Esr eliminator k&n style with outerwear
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And thanks for the help guys
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Found a blocked pilot
,I need to start draining the carb for storage
Airfilter is a Esr eliminator k&n style with outerwear
A blocked pilot will run like chiat. My R was smokin worse than having a choke on when running. Jut a lil piece of rubber from the fuel line made its way down there.
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im not sure that it matters if you live north ,south, east or west. super tech is only a small portion castor so it may sit indefinatly with no problems. not much experience with that oil so ill take your word for it. the moral of the story is this: if your engine works fine one day and sits a month and wont run with the choke off , there shouldnt be much question where the problem is. pilot orifice simply isnt allowing fuel to pass
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Found a blocked pilot
,I need to start draining the carb for storage
Airfilter is a Esr eliminator k&n style with outerwear
if you put it away for the winter i suppose you could drain the carb and blow air through the orifices etc. but if you know youll ride again in a few weeks just shut the fuel valve off and let the engine run it out. youll hear when its getting empty and shut er down. ive had good luck with this method and the engine fires right up next time
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but if you know youll ride again in a few weeks just shut the fuel valve off and let the engine run it out. youll hear when its getting empty and shut er down. ive had good luck with this method and the engine fires right up next time
I do the same thing after washing the bike after a dune trip. Seems a little lean though when you start her back up.
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just shut the fuel valve off and let the engine run it out. youll hear when its getting empty and shut er down. ive had good luck with this method and the engine fires right up next time
This is what I've done on my bike after every ride for over 20 years, weather it's going to sit over night or for 6 months & my carb always looks clean as new whenever I open it up.
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When your done riding and you are going to put the bike away for a week or so, try to kill an engine with the choke. This will wet the lower end with a little more fuel and oil. This helps prevent rust especially if you just washed it and the pipe may have some moisture in it.
If it is going to be more than a couple of weeks the carburetor needs ALL of the fuel removed from the float bowl. If you shut off the fuel and let it idle until the engine runs out of fuel, your carb is not dry. The fuel level is just lowered to the bottom of the pilot jet and the lower end is a little "dryer than normal". A bottom end that is dryer than normal will be more apt to rust especially in the summer when the humidity is real high. The remaining fuel in the float bowl will eventually leave a slug of oil in the main jet and possibly reduce the effective main jet size the next time you run the engine.
Every time the fuel is allowed to evaporate from the float bowl there is potential for every jet in the carburetor to become slightly smaller because of this small film of varnish coating everything inside the float bowl. Depending upon the type of two stroke oil, this film of varnish that forms inside the jets can eventually lead to lean conditions that will burn pistons.
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Jerry, it sounds like the easy solution is ride these SOBs instead if letting them sit.