Boost bottle questions

switchback0410 · Jan 30, 2013

So I have a 04 switchback 700 with about 2200 miles on it and ever since i have owned it it has always kinda had a sputter when you crack on the throttle and i could never totally get to go away, ive cleaned carbs many times, replace floats and needles, replaced fuel lines, put new gas tank on it, with new filter, adjusted air screw. It is all stock besides a can, and a boost bottle, it had reed spaces which i took out because all they did was make it a pain to get the carbs out of the sled, my question is does anyone know if the boost bottles ever have this effect on these sleds like if there not sealed right or something or what else should i be checking for.

Kraven · Feb 1, 2013

switchback0410 said:
So I have a 04 switchback 700 with about 2200 miles on it and ever since i have owned it it has always kinda had a sputter when you crack on the throttle and i could never totally get to go away, ive cleaned carbs many times, replace floats and needles, replaced fuel lines, put new gas tank on it, with new filter, adjusted air screw. It is all stock besides a can, and a boost bottle, it had reed spaces which i took out because all they did was make it a pain to get the carbs out of the sled, my question is does anyone know if the boost bottles ever have this effect on these sleds like if there not sealed right or something or what else should i be checking for.

Sometimes it's difficult to diagnose whether you're RICH or LEAN.

Next time out on the snow, bring a metric Allen wrench and some needle nose pliers with you along with a Phillips screwdriver

RICHEN: Try picking up (lower the E-Clips) the needles (1) ONE groove at a time.

Test drive it and see if that improves.

If not, go the other direction with the E-Clips.

BTW, I've NEVER been a fan of boost bottles, but I don't think that's the problem.

To rule out a vacuum leak, spray some starting either around the Boost bottle connections while the sled is running and see if it affects idle speed.

Hope this helps diagnose your problem

MARV1 · Feb 4, 2013

40 pilots clean up the bottom end on these. Boost bottles do nothing for the VES engines, helped a ton with the Keihin equipped sleds though... And needles #2 from top...

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Boost bottle questions

switchback0410

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Kraven

Well-known member

MARV1

Well-known member

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