how many hours until crank replacement on '09 crf450r?

[mattbmx]

At 110 hours now. I've run a JE 13.5:1 piston since day one and replaced that at 50 hrs. How long for a crank? What else should be done if i open it up?

[dtha70]

i usually do bottom ends at 200hrs. and i strongly believe that if youre gonna have the cases apart, do it all! crank, trans and countershaft bearings, all gaskets and seals, rebuild water pump etc....

[mattbmx]

200 hours on which year crf450? I usually put 60+ hours a year on the bike and would rather replace before any real chance of having a failure.

[CamP]

The crank replacement schedule varies depending on the skill of the rider and the type of soil you ride on. Money making pros should do them at 100 hours. Competitive amateur racers should replace them at 200 hours. Non-racers can often go several 100 hours. If you ride hardpack, your crank will last longer than if you ride sand.

[mattbmx]

Sand and deep loom. I ride southwick a lot. Am level rider

[CamP]

Sand and deep loom. I ride southwick a lot. Am level rider

Probably another 50 hours then.

[nesc103y]

We race all the New England tracks and some Pro events, and replace cranks at 30hrs in our bikes. They usually fail at 45 when ridden hard.

[MELK-MAN]

huge debatable issue.. as some have said, depends on many variables. There is an old thread that was titled something like "how many hours do you have! post up!" ..

[gotwings]

I'm a Vet Expert and mine made it to 120 hrs., barely! When it started getting loud, I finally did it and was glad I did. I waited too long, and it was loose. Crank bearings, too. And don't use the Hotcams(hotrods) seals, if you go that route, they suck!

[mattbmx]

got wings, did you go with honda parts? any special things to know about or is it pretty straight foward?

[nesc103y]

200 hours on which year crf450? I usually put 60+ hours a year on the bike and would rather replace before any real chance of having a failure.

You certainly want to catch it before it fails. Because there is such tight clearance inside these motors, there is potential for destruction to the center cases, cylinder, and piston.

[dtha70]

200 hours on which year crf450? I usually put 60+ hours a year on the bike and would rather replace before any real chance of having a failure.

06, it has about 500 hours on it now, but you'd never know by looking at it or riding it. i ride ALOT and at mid pack B level mx.