Question about Yamaha YZF 600 R thunder cat Motorcycles

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My 1999 thundercat back fires and not giving the right amount a power

Put gas line antifreeze in the gas tank still back firing and not giving the amount a power as it did before

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  • Expert
  • 133 Answers

Check for any air leaks around the intakes.

Posted on Dec 30, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 6 Answers

SOURCE: honda cbr 600 wont start

hi, each lead has the specific number on it. if you do this correctly then they genrally give you an idea to where the sit in the coils( the way they bend :-) ) also i believe the coils are better off been attached to the frame once you are sure leads are in corect order and possitioned correctly in the coils.i just presumed the coils neaded earthing. make sure battery is pleny charged as a bad battery can just hinder. it is also very easy to flood the bike so just check the plugs again. if they are unusually wet then dry them off and try again . otherwise maybe try cleaning all electics.

hope this somehow helped
gavin barraclough

Posted on Apr 26, 2009

  • 15 Answers

SOURCE: running rough. no gas going to front plug.

If your plug is dry, then there is no fuel. This can happen for two reasons: No compression - be sure to get a compression tester and ensure that there is enough compression produced by the engine to enable the engine to run. More than likely, though, there is no fuel getting to the engine. When cleaning carburetors, it is important that you use a chemical dip. Spraying carb cleaner through it is not enough. Be sure to disassemble completely: fuel float and its needle and seat, all jets, all emulsion tubes, all air cut off systems and accelerator pumps, all enrichment circuits (choke), vaccum slide and diaphragm, all air jets, and last but not least - the idle air/fuel screw. If this is the first time the carb has been taken apart you have to drill the cap to get to the screw. once everything is apart, soak all metal parts in the Berryman or equivalent chemical dip solution for at least several hours. After, run hot water, as hot as you can stand over all dipped components and blow out with compressed air. reassemble and enjoy.

Posted on Sep 25, 2009

ollie reece
  • 1167 Answers

SOURCE: 1997 Honda vt750 magna

wow that a heleva lot off fuel buddy right is the jets standard also on the carb is a screw turn this mixture screw in 1/2 a turn or till it stops back firing and get back to me 40b9700.jpg

Posted on Sep 26, 2009

  • 23 Answers

SOURCE: gas is pumpin through the petcock through the line

If you have fuel going to the carb, it would suggest that the fuel is not passing through it into the cylinder for the spark plug to ignite. Would suggest stripping and cleaning the carbs. Also check the rubber boots if they are CV carbs and check that the vaccum pipes are fitted correctly.

Posted on Feb 22, 2010

SOURCE: just bought a honda cr 100, yes i got it started

Your timing is off. Try backing the timing up to 4 degrees before top dead center!

Posted on Mar 22, 2010

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-5 outside, very little gas, car will not start, frozen gas line


This is a tough situation if you cannot get the vehicle indoors. That is the best course of action to unfreeze the lines. You can use an electric blanket or heating pad where practical but i would caution against any kind of open flame like a kerosene heater or even using a blow dryer.
It may not help right now but in the future if you know the temp is going to be low filling your fuel tank at least 1/2 and using a fuel line antifreeze is the best solution. In the absence of actual fuel line antifreeze, you can use 90% rubbing alcohol in small amounts (depending on fuel level but likely no more than 8oz for a full tank) to prevent freezing.

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1 Answer

Just will not start


You have most likely done this but lets go back to the basics.

Do you have spark at the plug?
Check to see if the plug is fouled - pull the plug connect to the plug wire- ground the metal part of the plug to the metal body of the engine - as you turn the engine over it should fire cleanly from the center to the electrode, if it fires off to the side or has an orange colored spark it is fouled - replace it.

Once we have spark check for gas is it getting to the carb?

90+ % of all small engines not running are due to the fuel line or in tank screen being plugged with garbage. Remove the fuel line from the carb, point it down and using a small container to catch the gas it should flow freely.
If you have good gas flow reconnect the fuel line to the carb and put about 1 CC of gas in the plug hole reinstall the plug and fire it - almost all small engines use a bit of vacuum to pull the fuel from the carb into the cylinder, jump starting them with a very small amount of gas directly in to the cylinder can help them get going.
A VERY SMALL AMOUNT OF GAS AND CLEAN UP ANY SPILLS BEFORE YOU TRY TO START !!
Burning down the house will upset the other half

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Hesitation


buy a couple bottles of gas line antifreeze and put them in the gas tank.... sounds like water in your fuel.


Robert

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Bucking during normal driving


at first blush i would say water in the gas... buy a couple bottles of gas line antifreeze. put them in the tank and let it set overnite if you can tho sometimes it works faster then that. gas line antifreeze is alcohol (NOT the kind you would drink).
if that solution doesn't work the next alternative is that the coil pack is going.

Robert

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