STP Complete fuel system cleaner | GTAMotorcycle.com

STP Complete fuel system cleaner

Green Machine

Green Machine

Well-known member
Ok just bought an older bike which was running about 95% as to be expected being 25 years old. then yesterday it wold only start with the throttle fully opened, and would not rev at all, only idle. I thought **** obviously something wrong with the fuel somewhere, or the damn carbs. So , I did some research and found that most people were using seafoam to clean out their system. I went to CT today to pick some up and read the directions- it's a project to use that stuff. so after reading a few products I went with this STP stuff. had the same claims, with less work. I added way less than recommend , ran it for about 4 mins and Blammo!! that thing was purring like beast in heat, it obviously blasted out whatever was blocking the fuel. If I were to guess it hasn't run that well in years. I gave it a little run, the responsiveness increased 100% and just felt clean. I also shut it down and restarted it a few times with no issues. I'm not going to recommend this 100% as of yet until I try to start it again tomorrow, who knows it may totally screw it up over night or fingers crossed will be back to new still. I will update tomorrow. in the meantime here is the stuff or the link to it : http://www.canadiantire.ca/AST/brow...+Fuel+System+Cleaner.jsp?locale=en#product_aa I think if this works it might be a better fix than pulling your carbs off every time there is a problem. wish me luck!
 
What do you mean a project to use seafoam? You either dump it in the gas or the gas + vac line. Quite easy.
 
im not sure about bikes but when using these type of cleaners on car engine you have to look for leaks afterwards. the same gunk that might be causing problems might be holding engine seals together... but using something else with seal conditioners would help the seals. kind of like how our bike chains absorb lube. on my car ive used Gumout which caused a bit of oil leaking but topped off the engine with a high mileage oil that had conditioners.

im not sure whats in the stp stuff but what you want is something with PEA (polyetheramine) stuff like seafoam can cause problems with the cat convertors and o2 sensors since its being blasted with tons of crap..... oh yeah and there might be all the crap going in your engine so change your oil perhaps.
 
silverbullet132 said:
What do you mean a project to use seafoam? You either dump it in the gas or the gas + vac line. Quite easy.
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It's a project for me as I am in underground parking and not really permitted to do automotive work down there. The directions were hook on up to the intake or something. I will check for leaks tonight. Although all the gaskets were just replaced so it should be fine and wasn't leaking this morning.
 
I use this stuff when I can't find Seafoam in liquid form in a hurry. Have had no problems with it.
 
Had an 02 zx6r and the carbs were giving me issues one spring. Poured in a can of Wynn's carb cleaner and a half a tank later, ran like new.
 
Ive used Seafoam in everything now.

It acts as a fuel stabilizer and use it in everything. My old dodge dakota developed idling issues, and poured some in the fuel and the rest through a vacuum line.

It smoked so bad the neighbourhood thought my truck was on fire. After a quick run to clear it out, it ran like a top and got better fuel mileage out of it.
 
^^^ He's talking about seafoam. The can says to pour some in your crankcase to clean any sludge out. But usually you just end up with a bottom end knock due to lack of lubrication.
 
brucewayne said:
what could a person put in there motorcycle oil and why would you advise against it?
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StrickCBR said:
^^^ He's talking about seafoam. The can says to pour some in your crankcase to clean any sludge out. But usually you just end up with a bottom end knock due to lack of lubrication.
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^^ This. And seafoam (and 99 percent of other "cleaners" you put in your oil) is not safe for wet motorcycle clutches so DON'T put ish in your oil.
 
okay fair enough. i was talking about cleaners that you put in the gas tank though, to clean out fuel systems. i don't know much about these oil type of cleaners you're mentioning.
 
hpvchewy said:
^^ This. And seafoam (and 99 percent of other "cleaners" you put in your oil) is not safe for wet motorcycle clutches so DON'T put ish in your oil.
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It works fine! Don't leave it in there for long though, one or two heat cycles and dump it. I used it in my last track bike because the oil would instantly turn black after a change. I used seafoam and did 4 oil changes back to back with a few heat cycles using cheap oil, it was clean as a whistle after with zero negative affects 6 track days later (then sold it to upgrade).

I would try using seafoam but I wouldn't neglect a good carb cleaning expecting the "magic solution" to unplug and clean everything properly.
 
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You said:

brucewayne said:
im not sure about bikes but when using these type of cleaners on car engine you have to look for leaks afterwards. the same gunk that might be causing problems might be holding engine seals together...
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brucewayne said:
okay fair enough. i was talking about cleaners that you put in the gas tank though, to clean out fuel systems.
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Where do you think this gunk that's holding the engine seals together is? Inside the crankcase. How does anyone clean the gunk? By putting cleaning solution in the oil. Putting cleaning solutions in your gas tank will NEVER dislodge the sludge or cause engine seals to leak, ever.


dricked said:
It works fine! Don't leave it in there for long though, one or two heat cycles and dump it. I used it in my last track bike because the oil would instantly turn black after a change. I used seafoam and did 4 oil changes back to back with a few heat cycles using cheap oil, it was clean as a whistle after with zero negative affects 6 track days later (then sold it to upgrade).
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Some bikes (like my Yamaha), it's impossible to get all of the old oil out when you change it (I think 0.5L remains in the pan or something). There's instructions about using the starter to turn the engine over (at full throttle, so it won't start) with no oil in the bike, and the oil pump will suck the last bit out of the pan and squirt it over to the drain plug side, but I'd never do it. I think just some bikes are better at getting the old oil out, so the new stuff stays looking newer, longer.

My friends 2000 zx6r, JohnnyP changed the clutch in it. Even after a track day the oil is still bright red (Motul 7100) and the inside of the engine is spotless, inside of the block is shiny like it just came out of a pressure washer!
 
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hpvchewy said:
You said:



Where do you think this gunk that's holding the engine seals together is? Inside the crankcase. How does anyone clean the gunk? By putting cleaning solution in the oil. Putting cleaning solutions in your gas tank will NEVER dislodge the sludge or cause engine seals to leak, ever.


Some bikes (like my Yamaha), it's impossible to get all of the old oil out when you change it (I think 0.5L remains in the pan or something). There's instructions about using the starter to turn the engine over (at full throttle, so it won't start) with no oil in the bike, and the oil pump will suck the last bit out of the pan and squirt it over to the drain plug side, but I'd never do it. I think just some bikes are better at getting the old oil out, so the new stuff stays looking newer, longer.

My friends 2000 zx6r, JohnnyP changed the clutch in it. Even after a track day the oil is still bright red (Motul 7100) and the inside of the engine is spotless, inside of the block is shiny like it just came out of a pressure washer!
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well im not sure about bikes, but ive put the cleaner Gumout in my car gas tank and its caused leaks since my engine lost oil. i used a high mileage oil with seal conditioners to top it off and the leaks stopped. thats just my experience. from what i understand, the cleaner is for the fuel system and the injectors but no engine is perfectly sealed and so some of it makes its way into the oil... one of the reasons why oil gets dirty. i don't know much about seafoam other than its looks really cool when used and people run into cat and o2 problems
 
brucewayne said:
well im not sure about bikes, but ive put the cleaner Gumout in my car gas tank and its caused leaks since my engine lost oil. i used a high mileage oil with seal conditioners to top it off and the leaks stopped. thats just my experience. from what i understand, the cleaner is for the fuel system and the injectors but no engine is perfectly sealed and so some of it makes its way into the oil... one of the reasons why oil gets dirty. i don't know much about seafoam other than its looks really cool when used and people run into cat and o2 problems
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If your car is blowing that much fuel into the oil you've got more serious problems to worry about than leaks seals :( Pretty crazy though.
 
hpvchewy said:
If your car is blowing that much fuel into the oil you've got more serious problems to worry about than leaks seals :( Pretty crazy though.
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lol. yeah i know its unusual. i don't know if it was coincidence or what. this was some time ago and no problems since. but im just saying that i wouldn't state that it never happens thats all.

i can now see and understand the wet clutches on bikes and the cleaners having problems though.
 
UPDATE: Just fired up the bike, and just like new, more responsive, running better and cleaner NO LEAKS! I am so amazed that I added a bit to the big bike and almost instantly it sounded even better, and was more responsive on the throttle. I must say this stuff is awesome. Reminder that I am adding about half or less what is recommended for cars. I am adding to the gas not to the oil folks. Although I really don't see the issue with adding some dura lube to the oil, not that I have. but really, wouldn't it rub off of the clutch plates as they are not metal and it is meant to treat metal? although my engine is aluminum so I guess there is no point of adding it.
 
Green Machine said:
wouldn't it rub off of the clutch plates as they are not metal and it is meant to treat metal? although my engine is aluminum so I guess there is no point of adding it.
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My clutch has metal plates between the fiber friction plates, not sure if all clutches do, but those are what usually gets burnt and warped :(
 
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