crank case seals and exhaust? QUESTION

[CadillacBanshee]

My friend is a bike mechanic and he told me that my crank seals are leaking and causing my bike to lose power. He said he can tell by the way my exhaust sounds...WTF is he talking about? He also said something about a vacuum in a crank case leaking and all kinds of other bs... Can any one tell me what the heck he is talking about?

[Wallrat]

Anytime you've got the cases split its a good idea to put in new seals. You can purchase a leakdown tester to see if you case is tight.

[HI TECH HORSEPOWER]

My friend is a bike mechanic and he told me that my crank seals are leaking and causing my bike to lose power.  He said he can tell by the way my exhaust sounds...WTF is he talking about?  He also said something about a vacuum in a crank case leaking and all kinds of other bs...  Can any one tell me what the heck he is talking about?

455806[/snapback]

 

WITH YOUR ENGINE RUNNING DOES IT SEEM TO IDLE HIGHER THAN USUAL?

MAG SIDE, REMOVE COVER WITH MOTOR RUNNING SPRAY A LITTLE BIT OF CARB.CLEANER BY THE SEAL. IF MOTOR REV'S UP WHEN APPLING CARB. CLEANER THEN YOUR SEAL IS SHOT----IF IT DOESNT REV.UP YOUR OK.

YOUR RIGHT SEAL(CLUTCH) USUALLY DOESNT GO OUT UNLESS YOU HAVE A BAD BEARING OR IF YOUR CRANK HAS ALOT AND I DO MEAN ALOT OF TIME ON IT AND THE CRANK WEB HAS A SEAL GROVE WORN ON IT OR IF YOUR RIGHT CYLINDER/PIPE IS SMOKING MORE THAN USUAL.

 

WHEN HE SAID HE CAN HERE IT ,WHAT DOES HE HERE?

[CadillacBanshee]

I wish i knew...I still think hes full of shit.