Yamaha 2004 Blaster Base Logo

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David Marr Posted on Apr 19, 2015

What's a good starting point for adjusting my carb jets and air intke

2001 200cc yamaha blaster bored 40 over

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3answers

2004 Yamaha Beartracker, new carb. Runs OK at idle but bogs down when I hit the throttle and won't reach higher RPM.

Sounds to me like your not getting enough fuel change fuel filter and tak gas out of tank and clean it out a few times as the screen in the tank may be clogged also if you have an electronic fuel pump make sure it is working properly
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New carb idles good but will not throttle up with out choke misses and backfire 07 grizzly 450

either the float height is wrong, the main jet needle needs lifted or there's an air leak somewhere.
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My 2000 Yamaha blaster 200 runs good at half throttle but bogs after half throttle

check for air leaks around the air filter and/or clean the carb
Dec 09, 2016 • ATVs
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What are the carb adjustment for a 98 Yamaha Big Bear 350cc atv

http://www.partzilla.com/parts/search/Yamaha/ATV/1998/BIG+BEAR+4WD+-+YFM350FWBKC/CARBURETOR/parts.html this page shows the carb all pieces including air mixture pilot and main jets
Oct 07, 2014 • ATVs
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2answers

Why does my yamaha 660 only run if the choke is on? What causes it to backfire?

Most of the time it's because the Pilot/Idle jet is clogged in the carburetor. This most often happens because of old fuel sitting in the carburetor during long periods of sitting and non-use. The fuel forms a varnish - a gummy layer inside of your carburetor and clogs the tiny holes in the idle jet. Since fuel can't get through, the engine dies. The hole for the choke is larger, therefore the fuel can still get through it.

clogged carb jets Google Search
0helpful
1answer

My blaster runs good but once it gets hot it revs up and wont stop i cant stop it with the run switch or the key i block the air to turn it off i put a new plug in it it has the oil pump off i mix the gas...

Sounds like an air leak... either at the base gasket or the reed valve gasket. or the carb/reed intake boot...MAYBE THE HEAD GASKET...

...AND ... get a qualified pro to look at your carb..tell him which parts you replaced...
1helpful
1answer

How do u adjust the throttle and fine tune carb also how do you know that injection pump that mixes with oil is working

a lot of people that take these apart put them back together backwards. make sure it is right. most of those carbs are not adjustable other than the jet itself. make sure your fuel tank is clean and fuel lines are clear/ fuel filters are clear or new.

If you need further help, reach me via phone at https://www.6ya.com/expert/ray_6d6dc1dfa6f18dc1

0helpful
1answer

Blaster stuck on full throttle

I would check the plastic heat isolator between the carb and cylinder head for leak.
0helpful
1answer

Raptor 660 starting problem...new plug, new hoses, new oil, new radiator, rebuilt water pump, rebuilt thermostat, cleaned carb, cleaned all jets, cleaned petcock, cleaned fuel filter, turns over fine,...

Hey Josh,
Cleaning a carb is a little more that most people realize..it takes someone with knowledge and training to really do one right... take it to a professional..
13helpful
4answers

250 Polaris Trailblazer wont start- new spark new filiter help

Did u choke it ? -stroke are very cold blooded Mine(2003) needs a choke after sitting 1/2 hr at 70 degrees.
Mar 31, 2010 • Polaris ATV
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