I have read a few posts on here about ppl changing their fuel injectors from 8s to like 25s could someone explane this to me are the 25s richer or what can you fool the 02 sencers like this,like the lower voltage inline capasitors do?

 

Both injectors flow at a rate of 3.91 gm/sec., I do believe.

It is my understanding that the difference is in the spray pattern.

I don't know anything about inline capasitors, but,

With the SERT, you don't have to fool anything.
Simply adjust the fuel up or down.

mud

 

Daniel, As mud has said the difference being is the spray pattern. The Number 8* has 3 outlet holes and atomizes the fuel at a narower (sp) angle. The 25* has 6 outlet holes which results in a wider spray and better fuel atomization.
Other members have had good results by changing the stock 8* injectors to 25* purchasing a SERT and the using a 8* map to run on the richer side of the canned map. using the 25* map with 25* injectors is still leaner than using the 8*.
Of course the whole reason behind all of this injector swapping is related to a stage 1 upgrade. Air cleaner, Pipes / slip ons and remapping the ECM.

 

Daniel, The following Members; Mud Puddle, Trotterand WS6 Formulaare well versed in this area with a LOT of experience to back up their posts.
Mud has sent me a Few maps that are about as close as you can get to a rockin setup. Members helping members, These guys are TOP!

 

according to your bio your bike is an 07 it should have the 25 in it stock

 

Thanks for the info dynaflyer,I asked because i race a yamaha banshee 4 wheeler on a 300 ft track,and i have seen guys bring those fuel injected 600 honda crotch rockets with a banshee rearend under them,to the track with no muffler and race them for 3 or 4 years and believe me they punish them and seem to never have a problem with mapping.