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Runs at 1 /2 choke   Technical-Bikes

Started May-11 by Poppy (R2LL2R); 931 views.
dane1234

From: dane1234

May-31

Okay, no offense, but have you 1) checked your air filter and 2) checked your fuel filter?  I was having backfiring issues on my 2003 1100 cc Silverado with 65K miles, and was thinking about scheduling a visit to my local Yamaha dealer, but thankfully decided to check last time I had replaced air filter and fuel filter.  It had been awhile.  Replaced both.  Problem solved.  So, check basics first (blush).

Poppy (R2LL2R)

From: Poppy (R2LL2R)

Jun-1

None taken.

I have a hyper charger with a K&N filter which I recently cleaned and retooled.

I haven't changed the fuel filter so that I will do.

I think  the carbs are the source of my issue.

Thanks for the input.

All suggestions are welcome. 

DaveK1661

From: DaveK1661

Jun-3

Have you drained the tank and filled it with fresh gas? I run at least 89 octane. Among all the other suggestions made here, you also might pull the plugs and see if they show signs of running lean, or rich. I doubt yours will be as clean as in this picture- but a white residue is often a sign you're running lean, in which case running at 1/2 choke would make the mixture richer.

Signs Of Your Engine Running Lean | Fiix

Poppy (R2LL2R)

From: Poppy (R2LL2R)

Jun-3

The plugs were black from too much fuel.

Fresh gas this spring. 

It has been suggested that a needle popped out. 

Going to take the tops off to see if one did.

Hopefully it's that simple. 

Thanks for your input, appreciate any help

Jekel

From: Jekel

Jul-1

I find it is usually just easier to change the main and pilot jets every few years to avoid issues like this. Even with stabilizer and some seafoam each year. 

I just fired mine up after a couple years last night with clean carbs and it spit, sputtered for a few miles with all new and carb cleaner. Running much better after a few laps around the neighborhood:-)

Sure I thrilled the neighbors. 

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