Question about 2008 HM CRE F450R

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Pipe hey i am doing a project for school and my question is how does a 4-stroke pipe give the dirtbike added power? anyone that can help me out i will really apreciate it thanks alot

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This should help you out. http://www.challengers101.com/IntakeTuning.html

Posted on Nov 10, 2008

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49cc 2 stroke dirtbike runs great on flat land but not good on hills


Hi, Gadgetmen53 for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. If necessary, transport your bike to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your issue. For more information about your issue please visit the website below. Good luck and have a nice day.
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Whats most likely the prob if I filled my dirtbike oil level to full and within 1 hr of riding low on oil with white smoke and oio blowing out of exhaust


it would be helpful if you would give us details like what kind of oil, etc. and tell us if it is a 2 stroke or 4 stroke, off road only or dual purpose

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02 yz 250 not reving up


Check the compression. It should have at least 100 psi,..if not,then its time to rebuild the top end..IE piston,rings,bore cylinder. If compression checks out,i would start with the power valve. Two stroke dirtbikes power valves are notorius for gumming up and sticking,causing them to not rev correctly.

Aug 31, 2012 | 2003 Yamaha YZ 250

1 Answer

When my dirtbike is finally warmed up it begins to spit and sputter. I wrecked and bent my head pipe slightly. Would this cause my bike to want to die? When it is cold it runs just fine.


Hi, you dont say what this bike is, is it. Two or four stroke engine,
On a 2stroke this type of problem could simply be carbon jumping around between the gap on the plug,
Or a crankshaft oil seal leaking,

Feb 23, 2011 | kawasaki KX 250 Motorcycles

1 Answer

2000 kx80 dirtbike and need to know what the gas to oil ratio is for this


32 to 1. That means 4 ounces of engine oil per gallon of gas. Be sure to use 2 stroke ENGINE oil, not standard Motor oil. Please rate my answer. Thanks.

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How do you change the sparkplug?


I have a suzuki 2005 dirtbike 250 4 stroke I can't find my manual anyone have that i can download or do you know where the spark plug is? it won't start

Apr 15, 2010 | 2004 Yamaha YZ 250 F

1 Answer

1999 ttr250 exhaust pipe


supertrapp sounds well nice not sure if they do them for your bike though. where are you in the world?

Apr 12, 2009 | 2002 Yamaha TT-R 250

1 Answer

Catalytic Converters


Motorbikes built since the 1990's more often have catalytic converters than those prior to this time. In countries throughout the world there have been studies regarding the impact of 2-stroke and 4-stroke motorbike exhaust contaminants into the air. The conclusion has pretty much been a change in policy requiring the inclusion of catalytic converters be an added feature on these motorbikes. From all I read it appears most manufacturers have included catalytic converters on 2-stroke and 4 stroked motorbikes for quite sometime. The majority of these motorbikes sold today, will have a catalytic converter. In the event you find one without a converter, if would probably not be a good idea to purchase it. An older 2-stroke or 4-stroke motorbike, probably could have a catalytic converter added, although it might be expensive to do this.,,,

Nov 10, 2008 | 2005 Qianjiang QJ125-4

1 Answer

Catalytic Converters


Motorbikes built since the 1990's more often have catalytic converters than those prior to this time. In countries throughout the world there have been studies regarding the impact of 2-stroke and 4-stroke motorbike exhaust contaminants into the air. The conclusion has pretty much been a change in policy requiring the inclusion of catalytic converters be an added feature on these motorbikes. From all I read it appears most manufacturers have included catalytic converters on 2-stroke and 4 stroked motorbikes for quite sometime. The majority of these motorbikes sold today, will have a catalytic converter. In the event you find one without a converter, if would probably not be a good idea to purchase it. An older 2-stroke or 4-stroke motorbike, probably could have a catalytic converter added, although it might be expensive to do this.,,,

Nov 10, 2008 | 2005 Qianjiang QJ100-4

1 Answer

Help with self-diagnosis/repair


Hey there, do you have the service manual? I can't help you with the specific technical stuff, but the manual says, 2-2 error code: Short Protect circuit.

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