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I read on here that a few people were cutting their carb spring, so I went and did the same thing. I cut 5 rings off and that didn't seem to make much of a difference. Where are the 2 holes that people are drilling out? I know how to change the jet from like the 180, down to 160 or so on. I didn't do the jet kit the first time, my buddy did it while I was at work. I used a Dynojet kit. When you put the stage 3 jet kit in, do you automatically change the main jet to the 50, or is that extra? I want the most I can get out of my predator, os it would be appreciated if anyone can help me out. Thanks

Brian
 

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Note to self: never let a buddy rip my carb apart when I not around.

The two holes are the black plastic piece in the middle of the carb. Drill two outside holes one size bigger. If you had a 180 main, start with a 170, then if you have to keep going down to 160 if need be.
 

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what exactly does drilling the two holes do?? By the black plastic piece do you mean the throttle slide???

THanks
Sean
 

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It increases the volume of vacum that goes to the diaphram. By allowing a greater volume of vacum to get to the diaphram it makes it react faster, which makes it open quicker.
 

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does anyone have a picture of this where youre drilling? will it do me any good, will be running a clamp on filter and stock pipe,, i plan to get a pipe, but im working on getting the $$ for it first
 

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everyone - just use caution when doing this mod. you can go over board. cutting the spring does give quiker reaction but to much can make it unreact slower. another words if you let off the throttle you may have a split second for the carb to unreact. make sense? and if you over drill the holes you can have a negitive affect in the vacuum area. just do everything in moderation
 

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What if you get the same size spring but a softer one instead of the stock one it would do about the same thing rigt?I went with the softer one got better responce with it i think that i will go one size bigger with the holes on sunday try to get a little better responce and see how that gos

Tom
 
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