carb issue??

BLAST-IT

New Member
Mar 13, 2012
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bliarsville, ga
hey guys took blaster out for a 45 min ride today and all seemed fine. while sitting at my house it just died. after kicking for a min i got it to start with the throttle wide open but it struggled to run. pretty fresh standard bore 32:1 premix fmf fatty and silencer with tors unhooked. havent got to check it out yet. any ideas
 
i have only the basic wires to run, no lights, and a push button kill switch and uni filter. i did a quick check on fuel and spark and i have both. plug has little over a hour NGK BR9ES any idea where to begin. carb was off and cleaned saturday night
 
Like I always say. Standard Practice is to do a compression test and a leak down test. If it passes, clean air filter and carb. Take a good look at the reeds when you take the carb off.
 
didnt have chance to check compression and i'll be making a leak tester soon. carb was soaked in dip and cleaned with spray. i did notice a few air bubbles in the fuel line. is that of any concern
 
Reeds could be the problem.

I am interested to why you are running a BR9ES, when a B8ES is the correct heat range for a Blaster motor.
 
a plug can foul immedietly, try a new plug then check the reeds
 
I never listen to the radio when I ride so I dont need to use a BR8ES resistor plug.

I just use the plain old B8ES.

I know you aussies havent yet discovered radio waves but please dont mock the enlightened world...LOL;)

My bad, ya I dont use BR8ES either, just for some reason that came to mind when I was typing and didnt realise
 
Just found this write up::

Q: When should I use a resistor spark plug?

A: NGK "R" or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking.

NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.

They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.

In fact, using a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion.
 
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so im going to check the reeds now that im home. bike had br9es from previous owner so i guess a trip to the parts store is in my future too. thanx for the imput guys. ive used this site with lots of help so i figured i would join since i have a pair of blastys again
 
one side of my reed cage the reeds are gapped open. tried flipping them and the are still gapped when tightened down. guess i will be getting a new set soon.