Carbie cleaners? – OLD Bull Trailriders

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March 4, 2012 at 10:37 pm #101129

Mick D
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My sister inlaw has asked me to sort out her GPX250 that wont start. It has been sitting in the shed for about 2 years. I have narrowed the problem to it not getting fuel. (it starts on ether) So I am going to have to pull the carbies out and give them a clean. Anyone got some recommendation as to a good carbie cleaner to get rid of the varnish or what ever ails the carbies?

March 4, 2012 at 10:46 pm #217616

glenn
Member

theres a good brake cleaner around,,I think its called shellite or something like that Mick,, might work?

March 4, 2012 at 11:04 pm #217619

Greg
Member

Brake clean is better for removing brake dust, oil, grease and generally doing brake conponents Boony. it is brake clean after all. It will do a clean carby well but to remove the wax and varnish left by stale old fuel you are better off using carby cleaner.
Try Valvoline “Heavy Duty Carb & Throttle Body Cleaner” or Loctite “Pro-Strength Varnish Remover”

TB

March 5, 2012 at 8:54 am #217622

Mick D
Member

Thanks TB, now I just gotta work out how to get the carbies out. Man road bikes are a pain in the arse to work on!! Fairings and all that shit to come off before you even get to see what you are up against!

March 5, 2012 at 9:24 am #217652

Geoff Forshaw
Member

Another really good carbie and throttle body cleaner is CRC brand. Just don’t get it in your eyes. :blink: Cause it does get your attention eh! 😆

Lefty

March 5, 2012 at 10:57 am #217653

Mark Bunting
Member

Lefty wrote:

Another really good carbie and throttle body cleaner is CRC brand. Just don’t get it in your eyes. :blink: Cause it does get your attention eh! 😆

Lefty

:laugh: :laugh:

Your supposed to point the nozzle away from you Lefty. Not look into it :laugh: :laugh:

And I thought you were a pretty clever bloke :whistle:

Kram

March 5, 2012 at 12:21 pm #217663

Jeffrey Smith
Member

I used Wynnes Carby and Throttle Body cleaner just recently on the DRZ. Didn’t even take the carby out, just took the top cover off and removed the drain plug then gave it a good spray. Then wound it over to flush it it through with petrol, sprayed it and flushed it again then fired it up and gave it a couple of squirts while it was running (it doesn’t like that part though).

March 5, 2012 at 12:54 pm #217664

Mick D
Member

Hey Jeffro, was it starting and running OK prior to you cleaning the carbie and you were just doing preventitive maintainence or had it given you some indication it wasn’t happy?

March 6, 2012 at 9:17 am #217665

Mick D
Member

Got the carbies out and stripped down, hit them with the magic spray and after my head stopped spinning from the fumes, I put the carbies back in the bike. Hit the button and it fired straight up! My excitement was short lived though, as it is still bogging at low revs and wont run with out the choke on , although it revs out fine up to 14,000 rpm. So it appears there is still an issue down low and the revs fluctuate at idle. Any ideas were to go from here?

March 6, 2012 at 10:04 am #217737

Greg
Member

micknmeld wrote:

Got the carbies out and stripped down, hit them with the magic spray and after my head stopped spinning from the fumes, I put the carbies back in the bike. Hit the button and it fired straight up! My excitement was short lived though, as it is still bogging at low revs and won’t run without the choke on , although it revs out fine up to 14,000 rpm. So it appears there is still an issue down low and the revs fluctuate at idle. Any ideas were to go from here?

If you leave your bike sitting with fuel in the carburetor for any length of time the fuel evaporates and leaves a residue which hardens and sets like glue. Carby clean will clean the components but isn’t a magic fix for all that is wrong. The choke is richening the mixture if you think about the operation of the carb the pilot jet feeds fuel from idle up to 1/4 throttle then the main jet needle takes over fron 1/4-3/4 throttle and the main jet handles 3/4-full throttle. The airways have been blocked in the body of the carb and because they are so narrow the pilot circut is always the first thing to block. The jets are extremely small and carb cleaner alone will not clean out a gummed up jet, soaking in fuel injector cleaner or something similar then high air pressure will help. Try high pressure air through all of the jets and carb body . If this doesnt work try acetone and soak the carb to soften the residue and then hit it with the air again. One problem with the acetone though, it will wreck all of the rubber gaskets your carby may have , so remove them first. If you have it out make, sure you can see through it and even run a very small wire through it, but be careful not to use the wire to score or scratch the inside area of the jet.
If you have the mixture screws out, wind them in first count it till it bottoms (write it down) and when putting back together bottom then and wind them out the same amount as you will have to balance them otherwise. For the amount of use the lady that rides this you will get away with the mixtures close enough.

TB

March 6, 2012 at 10:21 am #217738

Mick D
Member

Thanks TB, I will rip the carbs out again this arvo and give it another go. Getting the carbs out isn’t as hard as it first looked and now I have sussed out how to get them back in with minimal dramas. I am getting close to the money, as at least it starts and runs now! Just not quite running right though. :unsure:

March 6, 2012 at 11:09 am #217620

corey heather
Member

Boony wrote:

theres a good brake cleaner around,,I think its called shellite or something like that Mick,, might work?

Just so you know Boony Shellite is not a brake clean it is just an unreal alround cleaner when working on internals of all kinds, Will clean off grease and oils and dirts really easy. I sell it at work in a 20lt for about $80 and alot of mechanics and farmers use it. Top product

March 6, 2012 at 11:31 am #217740

Mick D
Member

It is a bit of a pain in the arse to get to the carbies and then get them back in, only to find that it all has to come apart again. It isn’t a 5 minute job to even get to the carbies, let alone get them out! The carbs on this bike are even hooked up to the bikes cooling system and you have to disconnect water lines as well as the myriad of other rubber hoses.

March 6, 2012 at 12:56 pm #217666

Jeffrey Smith
Member

micknmeld wrote:

Hey Jeffro, was it starting and running OK prior to you cleaning the carbie and you were just doing preventitive maintainence or had it given you some indication it wasn’t happy?

Moine wouldn’t idle and would cough and fart going up steep hills or on rough ground.

March 6, 2012 at 11:11 pm #217745

Mick D
Member

Well I “snapped” the carbies out of it again this arvo, armed with TB’s advise and low and behold I discovered that one of the pilot jets was indeed blocked. I soaked the pilot jets in carby cleaner in a small container. Had a beer then blew them through with an air gun.Put the jets back in. Jammed the carbies back in and she fired first kick and ran sweet.

Carbies aren’t that hard to work out, so if your bike is running like a hairy goat after being left for a while. It might pay to get a tin of carby cleaner and give it a touch up.

Thanks TB, what you posted was right on the money.
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