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Red Line Fuel System Cleaner

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Absolutely not. Never use any fuel cleaners in a 2-stroke no matter what the bottle says as it will remove the oil lubrication.

On top of that there is absolutely nothing in these fuel systems or carbs that a additive can celan. To do it correctly you need to remove and replace parts.
 
Thanks for the quick response. My SPX carbs were rebuilt 10 years ago and the bike has run Great with no fuel problems. I let it sit up for about 7 weeks without cranking and now hard to crank. After it cranks it revs up and runs for few seconds then bogs down almost quits. I seem to remember that is how it acted before the rebuild. I guess it is time to rebuild again. Thanks again...
 
I wouldn't either. A real problem with fuel system cleaners is they can cause fuel quality issues leading to detonation.

ONLY burn fresh clean high quality fuels in marine engines b/c the duty cycle is high unlike most any other application damage can occur quickly where it wouldn't happen otherwise, especially 2-strokes, anything older than a few months is suspect.

I feel so strongly about this, I avoid fuel stabilizer, I completely empty my boat tank for winter. If my fuel is beyond a few months old for whatever reason, I'll remove it and burn it in something else like an old lawnmower. If the fuel is really old and smells stale don't even do that, see if your local junkyard can recycle it.

Plan accordingly, use the fuel up last of season so it's easier to remove the remainder. Don't let those last few gallons sit in the tank over winter. If you cannot do this for winter storage in your case then add stabilizer and fill tank with fresh fuel to minimize air space in the tank. The problem with this is if the fuel sits there a couple years for whatever reason you have a complete tank full of questionable fuel that must be disposed of.
 
Fuel selector, fuel strainer, fuel lines if they are not soft and/or grey, carb kits including needle and seats.

Only use verified Genuine Mikuni parts and absolutely no aftermarket carb parts. Also a good time to do oil filter and service jet pump.
 
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