[HONDA_20]

I have a 2005 crf450r and i think my tranny oil is somehow leaking into my engine if this is even possible. I use the same oil on both sides but my tranny keeps going low and my engine is gaining oil and coming out my airbox. Please help me try to fix the problem...Thanks!

[motosicko]

There's most likely a right crank seal bad. Need to take right crankcase cover off, disassemble clutch to access seal. # 19 in drawing.

Good news is you don't need to split cases.

[HONDA_20]

thanks brotha man

[lvanduyn]

Does anyone know if the CRF 250r's have this same exact problem? Is the fix the same? My 250 also seems to be gaining oil on the motor side and losing some on the tranny side.

[amaviper]

Looks like it. Check the parts fiche. Crankcase section.

http://www.cyclepartsnation.com/pages/parts/viewbybrand/7/Honda.aspx

[kayesport]

I forgot to reply to this after I finish the work

Yes I replace the seal in between the engine and the gearbox and the problem disappeared

20 minute job no problem at all

Thanks for the help everybody on this one