Question about 2003 Honda CRF 450 R

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Cant tighting the cam chain no more 2003 honda 450 r

2003 honda crf 450 r

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Have the dealer replace the worn chain. On this new of a bike I think the chain may be okay. Ask the dealer if you are adjusting the chain properly.

Posted on Mar 12, 2009

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A cracked head or blown gasket
ether one has to be replaced.
Good luck........

Jan 26, 2014 | 2003 Honda CRF 450 R

1 Answer

Are the cam sprocket marks parrellel with the head ?

Are the cam sprocket marks parrellel with the head? - - - Yes and no. It is a bit complicated. Reply with your email address and I will email back a PDF of the factory service manual.

May 13, 2011 | 2003 Honda CRF 450 R

1 Answer

How do I change my cam chain

You should order a Haines Repair Manual or any other service book for you particular model. Your cam chain is driven of the crank shaft. I have changed them in on Honda and Yamaha and Suzuki multiple cylinder engines, single and double overhead cam both. This is a task you should be cable of doing if you follow the instructions exactly. There are alignment settings for your cam that have to be exact to get the best performance. Your crankshaft and cam have to be in the proper position. The alignment directly is related to your timing. In a car you would hear a common term timing chain. It is the same just your cam is is overhead not buried in the engine. I hope this gives you some insight. If you have a good mechanical aptitude and proper tools and the right instructions you should be able to do this task. Oh and use torque wrenches when called for.

May 11, 2011 | 2005 Honda CRF 450 X

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I dropped a valve shim into the cam chain hole on my 2003 crf 450. How can I get it out

You have three choices; 1) get an extending magnet and fish for the shim 2) turn the engine upside down, shake it and hope the shim falls out 3) split the case and manually remove the shim. On the second method, it would help if you drained the oil and then put two or three quarts of gasoline in the crankcase then shake the engine for a minute, ( so the gas can mix with the remaining oil ), THEN quickly turn the engine upside down, with the back of the engine pointing well forward, and hope the shim flows out with the gas. If you don't add the gas, the remaining oil will tend to hold on to the shim. When Please rate my answer. Thanks. tombones49_82.gif

Apr 15, 2011 | 2003 Honda CRF 450 R

1 Answer

Just got a 2003 crf 450 what oils do i need theres two sides

Use 10/40 in the motor with the moly additive from honda. Use a 85w motorcycle trans oil in the trans. I use Maxima 85w MTL and Blen 4 or the suggested Honda oil in the Motor.

Aug 03, 2010 | 2003 Honda CRF 450 R

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Do i need to put the clutch discs and steel plates in a certain position when replacing my clutch? 2003 Honda CRF 450

one friction plate and then one steel plate and so on until the stack is built, sand/roughen the steels for best clutch grip.

Jun 14, 2010 | 2003 Honda CRF 450 R

2 Answers

My 2003 Honda CRF 450 R Motorcycle won't start at all and the thing is it keeps giving of these explosions.

This sounds like it is out of time. You can remove the cam cover on the left hand side of the cylinder, remove the spark plug, rotate the motor to top dead center, this is when both valves are closed and the piston is at the top. confirm now that the two dots on the cam gear line up with the each other. If not, loosen the cam gear, remove the timing chain, line up the dots and rotate the cam til the two screw holes line up, reassemble. This should take care of your problem. I hope this helps.

Aug 05, 2009 | 2003 Honda CRF 450 R

1 Answer

Valve Adjustment for 2003 Honda CRF 450 R

This should help.
Please rate this answer, thanks.

Jul 25, 2009 | 2003 Honda CRF 450 R

1 Answer

Same problem hard to start using kick start

sounds right, but shims dont really wear the valve sits in or the lobe wears, hence the need for re-shimming

Jul 22, 2009 | 2005 Honda CRF 450 R

2 Answers

2002 crf450, rough running, back firing, hard start

Classic valve train issues. Sounds like the valves are tight. One thing that concerns me is the "sudden onset". Valves usually tighten over time.
Make sure you also tighten the cam chain as well.

Dec 26, 2008 | 2002 Honda CRF 450 R

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