20 Most Recent 2003 Honda CRF 450 R Questions & Answers

Is this a CRF450 single-cylinder off-road bike? If so: If it's coming out an overflow, it may be overfull. Not sure on that--haven't seen it before.To check engine/trans, drain, refill with (670cc w/o filter change; 690cc with filter change), start engine, shut off engine, check sight glass on side of engine. If it's low, add oil and repeat start/shutoff/sight glass routine until it's full. Engine and trans share oil.If it's still pumping oil out the overflow after you're sure it has the correct amount in it, be sure it's oil and not coolant, battery acid, or gasoline (there is a gas overflow tube on the carb for when the float sticks).

if it has a battery fit a good battery as the system may require 12 volts to energize the ignition system properly

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

None. This is a very reliable bike and I don't sell them.

3rd from top unless your in high elevation then 2nd.

Can get a bolt insert to repair the damage thread

go buy an over sized oil drain bolt

big end bearings on way out strip engine and rebuild with new bearings

The choke lever(?).

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.