Question about 2005 Bajaj Pulsar 150

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Engine race and new spark plug is rust carbon every 5-10km

Engine heating problem every 5-10km running.and bike is stop running spark plug is black carbon on combustion point(spark plug is new),without cleaning sp engine is not start.

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1.check your engine oil level. 2.check the silencer whether black smoke or blue smoke? in case black smoke, airfilter is blocked and improper air/fuel screw adjustment in carburetor. in case blue smoke,the oil burns inside the cylinder, check the valve clearance or the cylinder need to reboring or replacement along with piston....

Posted on Apr 17, 2014

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Sounds like to much back pressure, pipes may be clogged from oil and need burnt out.

Posted on Apr 15, 2014

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Check your air filter an then if that does not clear it up you may have a dirty inlet needle on the float a carb cleaning will go a long way I would say dirty needle if it does not fix look at coils weak coils can cause plug fouling but not that often

Posted on Apr 15, 2014

Testimonial: "tkanku sir but i has already clean air filter and carburator..but same problem face 1-plug fouling beacuse oil come on spark plug burning point, 2-engine very heat every 5-10 km"

  • pradip Apr 16, 2014

    3- and engine is racing..before on gear..after on gear engine is normalise

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Posted on Jan 02, 2017

sachin0161
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SOURCE: I have a bajaj Pulsar

please change the spark plug first as its life is over...dont listen to the mechanic and the battery should be in good condition

Posted on May 05, 2011

czaa
  • 4514 Answers

SOURCE: bajaj wind miss firing after engine bore

timing cud be messed up--chec flywheel marks for top dead cnter--also float level or jets of carb need service--test for rite compression

Posted on Aug 20, 2012

Testimonial: "Thanks a lot sir ,really it was due to timing chain, it is corrected upto 95% but still some times my bike mis fires bt it is not accountable. 1 more problem is there when i m increasing speed above 40-45 km/h ,it gives little jerk(as we feels when byk is going from main to reserve mode ).can u confirm wat is the reason behind this."

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Spark plugs carboning up


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I Have a 1978 Honda xl125 dirt bike .... my problem is that i have to change the spark plug ever second or third ride.. it will not make any spark after. the spark plug gap will be all black ( the side...


Your plug is telling you the answer here. Look at this chart.
http://www.hioutput.com/tech/plug.html
i have seen engine produce the dry, black soot deposit on plugs when the timing is just a little off. Run some Seafoam thru your fuel system and it will clean the carb, the carbon, the valves...everything.

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81 yamaha xj 650 spark plugs fire when engine isn't running


If you are saying the bike still continues to want to run, (rough running I am sure ), after the key is shut off then the engine is "dieseling". Carbon buildup on the piston / valves/ cylinder head is getting red hot from running. The hot spot(s) serve to ignite the fuel much the same as the spark plugs would. Burn only premium gas, be sure the cylinder is clean and not caked with mud or such, and change to a colder spark plug like NGK BP-8es or BP-9es ( BP-7es is the stock plug ). This may keep the engine cooler and stop the problem. The only other way is to pull the head then de-carbon it and the pistons. While the head is off, re-seat the valves using valve grinding compound. Check out Babbitts for parts. Go to www.babbittsonline.com/parts/viewbybrand/parts.aspx Please rate my answer.

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Wont start has spark , new fuel, new oil.


Is the spark plug black?
It won't run well with a carbonized plug.

Is the main jet in the carb plugged?
If the plug is dry after trying to start it.....your fuel is not getting into the engine and most likely a plugged carb jet..
Also.....Is the fuel switch working...is it in run position?

If the generator has sat for a while with fuel left in the carb/fuel tank.......the most common problem is a plugged varnished dirty carburetor in need of a good cleaning.
Always shut the fuel off and let the carb run dry (run until the engine stops)before storing.
Add fuel stabilizer to any remaining fuel or drain the tank before storing.

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Really black spark plug on 2002 wr426 irregular spark and runs fine when new plug in engine . only getting 5hrs use to a plug. running far too rich maybe any ideas ?


If this bike has a two cycle engine and auto lube or auto mix you might need to have the oil to gas mixture adjusted by a good motorcycle shop. It is not a very expensive adjustment, and running to much oil can carbon up the rings which can damage the cylinder wall.

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Noise from engine


A gearbox problem is possible but not likely. You are probably hearing pre-ignition aka; engine knock and detonation. Hot carbon deposits on the piston and head are igniting the gas before the spark plug does. Use premium gas instead of regular. Change gearbox oil (10w40). Get a new spark plug one heat range colder than the stock plug for your bike. Chances are the problem will go away once you are using premium gas and have the new plug.

Please rate this solution. Thanks Rashid!

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