The great debate, boost bottle???

[Nolimits]

I know this has been covered many times on the old site but I want to hear everyones opinion on it now. I have a 98 700 rmk stock I am looking at putting the slp power packs on, Their ad says to use in conjunction with the boost bottle. Are they just trying to sell parts or should I have one? I mostly hear the boost bottles are just a sales gimick but the power packs work. Lets hear your opinion!

 

[JET FUEL]

Here's a link to the thread I started about the boost bottle, some good stuff, maybe some smarter guys can add to it

http://www.snowest.com/fusetalk/messageview.cfm?catid=3&threadid=272522&highlight_key=y

 

[Razors Edge]

They cant hurt my 97 Yamaha came with one stock and i had one on my 800xc there like $25 BIG DEAL

 

[bowtieboy]

I have one on my 99, seemed to make a little better response. Not to sure, i partially gutted the airbox and put a can on it at the same time. But it seemed like it has less of a bog.

 

[Trenchmaster]

I installed one on my 02 800 RMK after adding an slp pipe, v-force reeds, and air box mods. The addition of the boost bottle required me to turn out the idle screw about 2 turns, I then needed to increase the idle jets one size.I believe the bottle works in my application as advertized, because the air flow on the bottom end increased by quite a bit.
Scott

 

[Nolimits]

So basicly I can get the same benefits of a boost bottle by just doing a little tuning?

 

[FurryCURT]

Put one on an 01 800 with SLP twin pipes airbox and heads. Having a bugger of a time trying to get it dialed in. Sled had no stutter before but does now. The tech guy at SLP apologized when I spoke to him at the show. Said they didn't work as advertised on the 01s. Might work better on your Keihin carbs though.

 

[Trenchmaster]

Furrycurt, have you opened your fuel screws? 5 turns out max, if it still has a bog try the next size larger pilot jets, worked good for me.
Scott

 

[FEZ]

So basicly I can get the same benefits of a boost bottle by just doing a little tuning?

YES! The Keihens can be tuned to work very well and deliver excellent fuel economy for a 700. 38 Pilots, 1371G needle in #3 for below 6K, #2 for above 6K and 2 sizes leaner than what Polaris says for mains and set the air screw 1 turn out for starters. This is for a stocker anyways. I do not think a boost bottle can improve on this set-up IMO.

 

[Old700]

in my experience, the Kehins are an excellent carb when properly tuned. I run the pwer packs and a boost bottle and did notice an improvement. Better response and slightly better mileage. Good upgrades just my 2 cents.

 

[Nolimits]

I just installed power packs in it but haven't ran it yet(still waiting on springs for the clutches). FEZ, thanks for the tuning info, I have been waiting for someone to share their tuning specs. I think I am going to pass on the boost bottle and just tune to the power packs now.

Thanks!

 

[MARV1]

Back then when I owned a '98 700 I installed a boost bottle on it and never been happier. Gained a couple mpg and throttle response. It works on the Keihins, but not so on the Mikuni's.

 

[puckered]

Was gonna put one on my 05 800 rmk, SLP said it doesn't make much diff on 800s. The 6s and 7s seemed to respond more. Not my word, theirs, so I spent the same $ on prefilters.

 

[GMCRMK]

I had favorable results on my '00 RMK 700 combo'd with the Power Packs.

Don't know if the bottle had anything to do with it though.

No additional tuning was needed.

 

[raysxc700]

i had spme on my 97 700 worked good no boots bottle tho but i think the sucked if you ride in the midrange so i skiped a few steps and went right for the TM 40mm flat slides the best thing i have ever done

 

[Nolimits]

I have read of a few people putting on the tm carbs. Why are they so much better than the Keihn's? Is it that more people have them on other sleds and are more familiar on tuning them?

 

[FEZ]

IMO it is because they did not spend the time on the Keihens to get them right. It took me a few seasons and recommendations from others that have also spent the time.

 

[icr]

a boost bottle can crack your carb boots causing a lean burn down. I've personally seen it on 2 different sleds. I don't know if it creates any performance gains, but I'll never run one.

 

[Nolimits]

Fez, those were my thoughts on why alot of people were doing the swap.