i have a 2004 blaster with a fmf fatty pipe and fmf power core 2 silencer. what is the standard jetting required to run this set up?
standard jetting required to run a fmf set-up
- Thread starter miks
- Start date
Most FMF'rs are in the 260-300 (for stock carb) range depends on weather, altitude, airlid on or off? Other mods?
i am now running a 240 jet, what i dont understand is that my bike was over fueling with a 290 jet but now it burns perfectly with the 240 in. would i risk melting my piston if i keep the 240 jet in
The only way to be sure is to plug chop!
Warm up motor to operating temp.
Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.
Switch off the motor and pull in the clutch, roll to a stop.
Take the plug out and replace the old one for the ride home.
Carefully cut the threaded end off the plug to expose the insulator.
There should be a smoke ring of a cardboard or biscuit colour around the insulator.
If it is non existant or a very light colour, you are lean and require a larger main jet.
If it is a lot darker you are rich and may go down a size in main.
I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/
http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/
This is a good to go plug.
This one is a little rich, but I would run it, I like to be on the safe side.
Warm up motor to operating temp.
Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.
Switch off the motor and pull in the clutch, roll to a stop.
Take the plug out and replace the old one for the ride home.
Carefully cut the threaded end off the plug to expose the insulator.
There should be a smoke ring of a cardboard or biscuit colour around the insulator.
If it is non existant or a very light colour, you are lean and require a larger main jet.
If it is a lot darker you are rich and may go down a size in main.
I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/
http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/
This is a good to go plug.
This one is a little rich, but I would run it, I like to be on the safe side.
FMF recommends a #260 main jet, as a starting point, I would be putting in a #270 with the air box lid on, and a #290 with it off.
If it runs well with a #240, I would suspect a needle and seat or a float level problem, or a filthy air cleaner.
Does the carby drip any fuel?
If it runs well with a #240, I would suspect a needle and seat or a float level problem, or a filthy air cleaner.
Does the carby drip any fuel?
i have a 2001 yamaha blaster with and fmf gold series fatty pipe with an fmf power core 2 silencer why do i have a #210 jet? what should it be? and it is also bored 40 0ver
I will play your game, why do you have a #210, maybe it is because you wish to fry the piston.
Get a #260 or bigger depending on your mods before the almighty lean monster eats up your piston and bore.
Get a #260 or bigger depending on your mods before the almighty lean monster eats up your piston and bore.
i just bought the machine all ik is that it isnt righ. while it is running i have gas dripping out of the bottom of the carb and it is really boggy but if i pull out the choke my throttle response is a lot better
Usually best to start your own thread for a problem rather than dig one up that's 4 mo or 4yrs old, that way we concentrate ONLY on your set-up/problem. It's good that you have been at least searching and reading.
Check this:http://www.blasterforum.com/do-yourself-20/easy-almost-free-way-stop-leaky-carbs-33335/
might need this:http://www.blasterforum.com/general-support-17/downloadable-yamaha-blaster-manual-17325/
Or this:http://www.blasterforum.com/engine-13/troubleshooting-maintenance-guide-30347/
Double check your main jet size, even if you have to use a magnifying glass.
Clean the carb, set the float, list jet sizes, needle setting, number of turns on air screw.
Then list ALL your mods (modifications), snorkle? box lid? holes in lid or box? Type of air cleaner, type of pipe? silencer? type & number of plug? premix or inj? type of oil?
As already mentioned a 210 is WAY LEAN, bone stock is 220-230 depending. Having to pull choke out is good indication that it's WAY LEAN ON EDGE OF MELTING DOWN.X(