Assuming my diagnosis is correct how much will it cost to fix. My oil leak turns out to be a seal buried in the bell housing between the engine and gear box. I can now see oil stains all around the bellhousing seam and get more drops forming on the sump. Its got worse so does this mean engine/gear box out separate to replace the seal? Any ideas how many manhours and what a dealer would charge to fix? I guess this work would be similar to older guzzis so any garage could do it or would it need dealer special tools?