Rich Brute - Kawasaki Brute Forum
 
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post #1 of 5 Old September 8th, 2019, 02:44 PM Thread Starter
 
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Rich Brute

My first time posting and new to forums in general. Our 2007 750 Brute has started running rich. To date have checked valve clearance (found to be ok), replaced spark plugs and air filter. I assume the next step is to go into carbs, but don't know what I should be looking for. Should mention I'm a retired auto mechanic and not afraid of carbs. I've seen posts referring to a dynajet kit. Looks to me like this kit just makes it richer - am I right? I ride at about 1200 ft altitude during the cooler months here in AZ and 7000 ft during the summer. Currently the machine is surging at about 15 mph and popping out the tailpipe. Pulling choke just makes it worse. Smooths out a little at 25mph and is scarry fast at full throttle. Bought it used, so don't know what has been done for sure although there is a hand written note in back of owners manual stating dynojet kit installed in 2014. Unknown if still there. Sorry about the long post, just need a little hand holding. BTW I also have the factory service manual for this machine. Thanks in advance for any info.
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post #2 of 5 Old September 8th, 2019, 03:47 PM
 
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There are four things that happens to these ...and none are exempt. #1- The carb boots split at or under the head-side clamp making it suck raw air in and lean way out. #2- The for one of several reasons the choke plunger(s) stop seating allowing the choke port to pull fuel through it all the time making it run rich. Could be a twist in a cable, rusted cable, corrosion in the bore or a dissolving O-ring or trash in the seat. #3- One or both float valves wear out and start leaking. First sign of that is gas dripping from the bowl overflows. Those are the ones that have the tubes that go down to the plastic thing on the left side. #4- the CV slide diaphragms develop cracks that cause them not to operate at all or as well.

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post #3 of 5 Old September 8th, 2019, 05:36 PM Thread Starter
 
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Thanks for the quick reply. Sounds like I'll be learning all about Kawasaki carbs!! Is there such a thing as carb overhaul kits or do I just ask for individual parts?
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post #4 of 5 Old September 8th, 2019, 07:14 PM
 
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Quote:
Originally Posted by tflite View Post
Thanks for the quick reply. Sounds like I'll be learning all about Kawasaki carbs!! Is there such a thing as carb overhaul kits or do I just ask for individual parts?
There are kits..but it's harder and harder to find then in this age of EFI. I always relied on PJ Motorsports for all my carb needs.

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post #5 of 5 Old September 11th, 2019, 12:59 PM
 
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6SIGMA HAS JET KITS AS WELL, BUT ONLY JET KITS - NO GASKETS.

05 Brute 750i Stock engine/Muzzy Pro exhaust,Vision Bruiser 14" wheels, 26" Kenda Bear Claw HTR, 3" intake snorkel w/ restriction,2" CVT snorkels,automotive 10" fan,ASR a-arm bushings,sway bar removed,buss connector mod,rejetted at #40 pilots,2 3/4 out on A/F screws,stock needles shimmed .030",# 160/# 160 main jets Keihin
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