2002 Honda CRF 450 R "piston" Questions

Why is my crf450 burning oil? Sounds like worn piston rings,oil passing rings(blow by),have to check piston to wall claerance to make sure its within spec,usually .002 to .004,if more, next size ...

Top-end rattling after it heats up, assume its piston slap. Is it time for rebuild? Do you recommend to rebuild head as well (valves and seats)? First, let's assume that the valve tappet clearances ...

...the top of the right center case half is a hose. The hose is to vent the buildup of pressure from piston blow-by into the gearbox. The vent hose is routed to the rear of the gearbox and the oil is ...

...is true top to bottom within .0008'' and clean,and the valve guides pass also. , With new std piston specs to what the bore is at, a snug .002'' is what i have.So first: what are the recomended ...

spewing oil out of the air filter when running That is usually a sign of "blowby, due to excessive wear either piston rings, or valve issues. Get a compression test done.

...my bike and it stald and would not start and the kick starter was hard to kick over It sounds like piston seizure - uncommon on a 4-stroke engine, but entirely possible. Causes could be:

...have a problem starting my 2002 Honda 450R. I replaced the old gas, jets. Should I look at valves, piston? Valves are your culprit, check your plug first, but if it has progressively gotten harder

i ran my 2005 trx450r low on oil it shut down and kick start wont budge ive been told piston could be siezed or the crank went ive also been told i should replace the crank regardless. i dont know if ...

...the bike might have to much oil in the bike so when you try to kickstart it, it sends oil to the piston and soaks the spark plug in oil. But when you push start it the spark plug is going alot so ...

...will start after 30 or so kicks, any ideas? Could be low compression due to head gasket leak, worn piston rings. Or bad spark due to dirty plug, wrong gap, plug breaking down, lead or cap breaking ...