Question about 2002 Honda CRF 450 R

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Hard to start back fires

After riding a while or the bike is on for 10 min it will take 20 to 30 kicks to start some times it back fires and throws flames out of the muffler

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Try checking the hotstart lever. mine would get stuck and had almost same symptoms.
cre 450 f

Posted on Aug 22, 2009

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Change the plug check the compression

Posted on Jun 23, 2009

  • thomas foster
    thomas foster Jun 24, 2009

    2002 model hondas had valve problems you need to check your valve clearance intake valves get wore out quick if your plug is not fouled then you have a valve problem my sponsored riders rode hondas and we had the same problem good luck....

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I think there is problem in ur fuel pump or the pipe check it out 1st

Posted on Jun 19, 2009

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1 Answer

Bike will sit and idle for over hour but if u ride it after ten 15 min it will lock up back tire and die then hard to kick after cooling down will fire back up


1. idle speed is a "no-load" situation.
2. Riding is a "load" situation. - This is when the problem occurs!

This could be something simple or very complicated to diagnose ... its time for a top notch professional... not just some parts replacer!!!!!

I gave seen a quad that would idle fine, even when warmed up, but try and race it and it would overheat and lock up. The problem was a BENT connecting rod, from forcing the engine to turn over when the engine was FULL of gasoline! (Forcing past a hydraulic lock situation!)

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Kawazaki kdx 125 wont start


KICK HARDER TRY PULL STARTING IT..IN SECOND GEAR..DOES IT HAVE ENOUGH COMPRESSION TO START?IT SHOULD START PULLING IT...START OFF WITH NO THROTTLE THAN IF NOT STARTING CRACK THE THROTTLE SO LIGHTLY AND SHE SHOULD FIRE OFF WHILE IN GEAR BEING PULLED OF COURSE BE CARE FUL NOT TO RUN INTO. WHO EVERS PULLING YOU..USE A LONG TOW ROPE..IF YOUR NOT A SEASONDED RIDER AND KNOW YOUR BIKE VERY WELL I WOULD NOT ATTEMPT THE PULL START...IF NOT CHECK YOUR COMPRESSION AND TIMING..MAJOR VACUUM LEAK MAYBE AT BASE GASKET..IS ENGINE SUCKING TO MUCH AIR? GOOD LUCK..

Mar 02, 2013 | kawasaki KDX 125 Motorcycles

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Would a misadjusted clutch cause my motor to back fire threw the carborator?


No, a misadjusted clutch would not mess with your carburetor. You more than likely have a dirty carb or some ignition gremlins.

Apr 29, 2012 | 2002 Buell M2 Cyclone

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04 Gsxr600 jerking and engine dies after riding for awhile.


I have an 05 with the same problem. Sounds like your STVA went out. Do you still have your butterflies wired open? I know how to repair the stva fixed mine, and saved hundreds....if your still on this post email me so we can get our bikes fixed. also check your kick stand sensor! This can malfunction and cause same stalling problems.

Apr 22, 2012 | 2004 Suzuki GSX-R 600

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Hey guys just bought a 426 was running gud. started 2nd kick almost every time.they guy i got it off said never been serviced in long time so i changed oil pug and filter..the bike was perfect put it back...


did the guy give you the starting method. if not you have flooded the plug and it will only start if you replace the plug or dry it out.
method. dont touch the throttle. pull decom lever and kick over 10 times.
release lever get topwith kick start. pull decom lever slightly to allow kick start to drop 1 notch. release lever and let kick start back up and kick hard.
repeat should start second go.

Feb 14, 2012 | 2002 Yamaha YZ 426 F

1 Answer

Hi i just got a 1990 xr600 ! it starts 1st kick when cold but even after just 10 mins of riding she is red hot and is immpossible to start ! why or what causes this ?


Too lean!

Carburation is more than likely set too lean, or like one of my buys, had a cracked inlet manifold..letting in air.

The site below shows the carby in all it's glory with every part and name. The list of jets size# are for the range of riding conditions for that bike. Get jets at least one increment UP in size. They're available from all bike make dealers.

Exhaust, cam or valve timing/modifications will efect jetting to some degree, as will the need of a top end service.

Cheers.

http://www.cmsnl.com/honda-xr600r-90-us_model7779/partslist/E++1601.html

May 19, 2010 | Motorcycles

2 Answers

Dirt bike thats hard to start..


needle and seat are worn out in carb, to much fuel is flooding cylinder. remove carb, clean, get new needle and seat, set float. problem goes away. pull your plug after kicking. its probably wet.
When you push, or pull start you evacuate excessive fuel, when engine is warm, easier to start extra fuel burns easier.

Mar 15, 2009 | Yamaha YZ 250 Motorcycles

1 Answer

Hard to start yz250 dirt bike 2001 4stroke


i used to own a yz426f and it had the exact problem... a fresh plug will fix your problem. change the plug and the bike will run great. also don't start the bike and shut it off , my bike would be fine if i started it and rode for a while getting to the proper heat range help save the plug. if my bike didn't start in one or two kicks it was usually the plug.



hope this helps

Mar 10, 2009 | 2003 Yamaha YZ 250 F

1 Answer

Squeak from the back end.


but hoping I could get a little help.I get a very loud squeak from what seems to be the back end of the bike under power. I don't notice it in first gear but 2nd and up I hear the squeak that is very loud. It is not a constant squeak but a jumpy one that seems to match the engine vibrations (as in it seems to squeak every time a cylinder fires) but only under power.I just put on new rubber on the back end last night and I left every guard off and it didn't change assuming that I have guards rubbing and squeaking but apparently not the case.Now what I find to be very interesting is that it is not always there. Case in point: Almost a month ago, I got caught in a pretty good rain storm. It didn't squeak again until I washed it. After I washed the bike, it never really went away until I ride for a while. Oh yeah, almost forgot to mention that the squeaking never really stays for a whole ride, just the start of it (10-20 minutes?)Is this a symptom of the wheel bearings going or do I have a problem with my belt drive? The bike is a 2003 XB9R and I know that there have been problems with the belt on some (not being strong enough) but from what I can tell, the belt looks imaculate for being 5 years old.Any ideas before I start throwing money at it until it gets figured out?,1. the belt will not squeak, so it's not that. 2. this is hard to figure out online.3. is it while riding constant or during normal/hard acceleration?,,,

Nov 10, 2008 | 2005 Buell Firebolt XB9R

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