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Van Jacobs Posted on Dec 27, 2012

Just put billet intake and 34mm carbs mikuni on rz and it bogs down every time I take off ? Before I added these it ran faster with stock carbs and intake.. What's the problem?

1 Answer

Tyrone Jeffries

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  • Contributor 17 Answers
  • Posted on Dec 28, 2012
Tyrone Jeffries
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Joined: Dec 26, 2012
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Check main needle clip position on top of needle. May need to lower clip 1 notch or make sure all vacuum hoses and lines are connected properly. Also make sure intake is seated properly, sounds like it could be losing vacuum somewhere.

5 Related Answers

joughton

John Oughton

  • 40 Answers
  • Posted on Jul 07, 2009

SOURCE: Air Filter Pods

Check the K&NFilters Website and you'll probably find the right size for your bike. Be aware, though, that changing air filters can lead to less performance as a result of carburetor jetting problems that can take some time to solve, and get your bike running well gain. Usually the manufacturer's set-up works better than home-fiddled-with ones.

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Anonymous

  • 377 Answers
  • Posted on Dec 19, 2009

SOURCE: when I hit the gas on my bike it bogs out? how can

sounds like its running to weak, check you air filter is clean,your fuel filter is not blocked, adjust your carb mixture,turn the mixture screws in untill they bottom out , but dont force them they have a fine needle pint and are easily broken making adjustment impossible,back them out 1.5- 2 turns and adjust from there..

Anonymous

  • 2050 Answers
  • Posted on Feb 11, 2010

SOURCE: brand new 24MM MIKUNI CARBURETOR that floods out the bowl...

Carb's can be cleaned, hope you didn't throw money away on a new one for dirt.
You may have dirt in the gas tank getting to the carb. If you can, remove the bowl drain, (At the bottom) and see if there is sediment in it.(dirt)

Anonymous

  • 20 Answers
  • Posted on Aug 26, 2010

SOURCE: have a suzuki 900 rf 900 when you give it gas it

This is probably the emulsion tubes, they get worn quite quickly and by about 30k miles need replacing. They cause rich running at low throttle openings and that is what bogs you down. If you find very progressive throttle opening reduces the problem but taking a handful at low revs bogs you down then this'll be the cause. I assume the rest of the system carbs, valve clearances etc are clean and spot on.

Anonymous

  • 8 Answers
  • Posted on Oct 14, 2010

SOURCE: twin mikuni carb adjustment

You can make a duel carb sync tool for about $2

Here is a link to a walkthrough for making the sync tool

CARB SYNC TOOL

Here is a link to a walkthrough for doing the carb sync

CARB SYNCHRONIZATION

Don't worry about the air-fuel mixture. It doesn't need to get adjusted.

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Yours is a Mikuni BDSR34 which is also a 34mm carburetor.
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It sounds like one of two things. One, the jets in the carb may be clogged. The way you're describing it, it sounds like the main jet in the carb is clogged. You're running off the slow speed jet. When you open the choke (enricher) you're adding a bit more fuel and air improving the performance a bit. If it's te carb, it needs to be completely disassembled and soaked in a professional quality carb cleaner and thoroughly gone through to ensure all passageways are clear.

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Hi and welcome to FixYa,

Jet size would depend which carb is installed, a Dellorto 34mm?

Initially, check the sparkplug tip colors. If very light brown to almost whitish, then lean mix; too much air, too little gas. Try raising the needle if if has notches and moving the e-clip. If fixed, use small thin washers. The basic idea is to make the needle rise early on throttle movement.

If an aftermarket open breather air filter is installed, then it would be causing the lean mix, too much air. Restrict the filter by adding temporarily upholstery foam to experiment at which thickness the flatspot would disappear.

Good luck and thank you for asking FixYa. Happy Holidays.
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