Boggy off idle and can't pull high gears

[YFS101]

just because they are the same does not mean they will need the same jetting.
lack of power and a soggy powerband is usually a sign of a rich mixture.
try a 280 and 270

 

[darederek]

im not understanding tht i mean they r as identical as possible. but either way we had 280 in it and it did same thing so since they r same we figured wed try same jet as mine. prob try some lower ones if 20 inch tires dont help

 

[JoshHockey95]

just because they are the same does not mean they will need the same jetting.
lack of power and a soggy powerband is usually a sign of a rich mixture.
try a 280 and 270

If that's the case how come all of our blasters came from the factory with the same jetting and they all ran fine.... Honestly we have the same setup in the same place at the same time how different could they possibly be. And this isn't to argue like everyone seems to love to do so much so don't do it

 

[super noober]

If that's the case how come all of our blasters came from the factory with the same jetting and they all ran fine.... Honestly we have the same setup in the same place at the same time how different could they possibly be. And this isn't to argue like everyone seems to love to do so much so don't do it

you gotta remember when they come from the factory they are all brand new from bumper to grab bar, exactly identical.

 

[hudack]

If that's the case how come all of our blasters came from the factory with the same jetting and they all ran fine.... Honestly we have the same setup in the same place at the same time how different could they possibly be. And this isn't to argue like everyone seems to love to do so much so don't do it

came from the facotry......new everything was as close to the same as possible you need to do plug chops to find out leakdown test would be good is the air filter clean and oiled when was the last time the carb was cleaned

 

[Awk08]

clean that carb completely, pull everything out of it and clean,
check the needle clip setting, is the brass washer under the main jet ????

 

[hudack]

you gotta remember when they come from the factory they are all brand new from bumper to grab bar, exactly identical.

ya beat me to that ya crazy fool

 

[YFS101]

If that's the case how come all of our blasters came from the factory with the same jetting and they all ran fine.... Honestly we have the same setup in the same place at the same time how different could they possibly be. And this isn't to argue like everyone seems to love to do so much so don't do it

Actually they dont.
but keep in mind the cylinder bore, piston, reeds etc everything is identical from the factory. That is not the case on a used engine.
Yamaha shipped blaster to thier dealerships with several jets, mixing bottle, and extra parts etc.
a 230 comes in the carb from the factory as a BASE setting but they are all shipped from Yamaha with 210, 220 230 jets as well as a jetting chart for local avaerage temps and jet sizes. However most dealerships just run that fattest jet, for the most reliability with no care as far as performance.
this is what the chart looks like

220 main jet, needle in 2nd groove for temps above 32o F
230 main and needle in the 2nd groove for 5o to 41o F
230 main and needle in the 3rd groove for 14o- -22o F

Canadian Models
220 main, 2nd groove for above 0o C
230 main, 2nd groove for -15 to 5o C
230 main, 3rd groove for -10 to -30o C


A lean mixture is powerful but HOT if too lean it will knock and suffer from detonation and pre-ignition.
A rich mixture lacks power, they have a soggy powerdand and have a hard time pulling higher PRMs.

If you want to test your jetting start rich, and work your way down. usually 2 sizes at a time. First find out what your needle setting is and whaqt kind of reeds are in it. Remember aftermarket reeds can make it much richer.
290 sounds rich to me.
On some of my customers bike I have run boyesen reeds, fmf pipe and no lid on a 260-270 mains.

 

[JoshHockey95]

you gotta remember when they come from the factory they are all brand new from bumper to grab bar, exactly identical.

Everything that I would think should affect jetting is the same though. Have same bore, pipe, we even tried putting his air filter on mine. I can see it being off a little bit but it seems like theres more to it than what is apparant

 

[JoshHockey95]

came from the facotry......new everything was as close to the same as possible you need to do plug chops to find out leakdown test would be good is the air filter clean and oiled when was the last time the carb was cleaned

Carb was cleaned end of summer, his wasn't cleaned since he owned it that I know of. I cleaned and oiled both of our filters the night before this. I'll chop a plug next weekend when I go back over. I didn't have the plugs or time to go get them this weekend.

 

[JoshHockey95]

clean that carb completely, pull everything out of it and clean,
check the needle clip setting, is the brass washer under the main jet ????

Washer is there. The one thing I haven't checked is the clip position, but I doubt it was ever changed since the previous owner was running a 230 with no lid, a filter with holes in it and a full fmf pipe. Don't worry that motor is blown up sitting in the corner of my basement waiting for a rebuild and a chassis to go in.

 

[JoshHockey95]

Actually they dont.
but keep in mind the cylinder bore, piston, reeds etc everything is identical from the factory. That is not the case on a used engine.
Yamaha shipped blaster to thier dealerships with several jets, mixing bottle, and extra parts etc.
a 230 comes in the carb from the factory as a BASE setting but they are all shipped from Yamaha with 210, 220 230 jets as well as a jetting chart for local avaerage temps and jet sizes. However most dealerships just run that fattest jet, for the most reliability with no care as far as performance.
this is what the chart looks like

220 main jet, needle in 2nd groove for temps above 32o F
230 main and needle in the 2nd groove for 5o to 41o F
230 main and needle in the 3rd groove for 14o- -22o F

Canadian Models
220 main, 2nd groove for above 0o C
230 main, 2nd groove for -15 to 5o C
230 main, 3rd groove for -10 to -30o C


A lean mixture is powerful but HOT if too lean it will knock and suffer from detonation and pre-ignition.
A rich mixture lacks power, they have a soggy powerdand and have a hard time pulling higher PRMs.

If you want to test your jetting start rich, and work your way down. usually 2 sizes at a time. First find out what your needle setting is and whaqt kind of reeds are in it. Remember aftermarket reeds can make it much richer.
290 sounds rich to me.
On some of my customers bike I have run boyesen reeds, fmf pipe and no lid on a 260-270 mains.

Everything on our quads that isn't factory is exactly the same, pipe, filter, no lid, and 290 main. Same compression even. I had a 280 in it saturday and switched to the 290 sunday, it did the same stuff both ways. I would think if it being too rich was the problem it would be breaking up even more now than it did with the 280. I understand the quads could be slightly different but they seem too close to be running this differently. If ours needed different jets I would think there aren't enough jets for all the different possible setups.

 

[99LRDblaster]

Did you guys actually do a leakdown test?

 

[JoshHockey95]

Did you guys actually do a leakdown test?

Yes. .

 

[darederek]

Actually they dont.
but keep in mind the cylinder bore, piston, reeds etc everything is identical from the factory. That is not the case on a used engine.
Yamaha shipped blaster to thier dealerships with several jets, mixing bottle, and extra parts etc.
a 230 comes in the carb from the factory as a BASE setting but they are all shipped from Yamaha with 210, 220 230 jets as well as a jetting chart for local avaerage temps and jet sizes. However most dealerships just run that fattest jet, for the most reliability with no care as far as performance.
this is what the chart looks like

220 main jet, needle in 2nd groove for temps above 32o F
230 main and needle in the 2nd groove for 5o to 41o F
230 main and needle in the 3rd groove for 14o- -22o F

Canadian Models
220 main, 2nd groove for above 0o C
230 main, 2nd groove for -15 to 5o C
230 main, 3rd groove for -10 to -30o C


A lean mixture is powerful but HOT if too lean it will knock and suffer from detonation and pre-ignition.
A rich mixture lacks power, they have a soggy powerdand and have a hard time pulling higher PRMs.

If you want to test your jetting start rich, and work your way down. usually 2 sizes at a time. First find out what your needle setting is and whaqt kind of reeds are in it. Remember aftermarket reeds can make it much richer.
290 sounds rich to me.
On some of my customers bike I have run boyesen reeds, fmf pipe and no lid on a 260-270 mains.

actually hey do have all that stuff the same. they both have stock bore, with stock cast piston, and 120psi of comp. they also both have stock reeds. also mine is jetted pretty spot on with 290 when checking jetting in the same place and same temp if you would read. maybe a 270 or 280 in summer. i can guarentee you that 260 was lean people run 260 with just no airbox lid and stock pipe.

 

[Awk08]

has derek done a leakdown test ??? or is it possible his rich jetting is a cover up for an airleak ???? possibly on the carb itself, which doesnt get tested with the leak testers ???
put the clip on the middle position on the needle and throw a 270 in there.
270 has proven to be the most popular with the fmf pipe, forget what derek has and just jet yours, boggy past mid throttle and not pulling the upper gears is rich, period.

 

[darederek]

no i havent done a leakdown. and i dont have any symptoms i would imagine that if i do it is small and i am just covering it up. but you also have to remember that mine is jetted for like 30 degrees or so so once it gets up 60's 70's and 80's when people ride most and put on here what they run i might very well be back down to a 280 or 270. only time will tell. i would have borrowed josh's leakdown tester and done it when i put the pipe one but 1 i forgot and 2 his leakdown tester from holeshot has a leak that we need to fix

 

[Awk08]

just tryin to help you guys diagnose this, on my sons i'm running a 300 main in a stock carb with an f7 then lrd right bend pipe < which flows way more and is known to require a way bigger jet than an fmf, so needing a 290 is tellin me something isnt right with dereks bike ????? leak test, and check the carb cap gasket, and is the little rubber boot on the throttle cable ??? hows the oil injection port blocked off ???
just try the 270 josh

 

[darederek]

is that what ur son runs in the winter? and ya sounds like this weekend were gonna try a 270 and he'll also have his 20 inch tires

 

[darederek]

also thats what hudack runs and hes close to us

summer i run a 290 with a vented lid and fmf plug looked perfect a 270 with fmf and two tiny little holes in the lid the lid i have now has like 8 holes with vents id start with a 290-300 in summer no lid winter mabey 310 but thats me