Hello, today I was talking with a co worker who asked me about my bike. I told him it's an 82cm450c but has a smaller(3gal) tank on it. He said he has an extra tank from his cb750 i think it was and it sounds as though it's the same to attach both tanks. He looked at mine and said that's how his tank fits on and said he would sell it for 75.00. Needless to say I'm interested but wondering if the bigger tank will really fit on my bike. Anyone know if this will work. I really need a larger tank as I travel 105 miles round trip each day for work and that little 3gal tank is annoying. Aslo if anyone knows for sure what bigger tanks would fit for sure could you please list which ones. Sorry for the lengthy post but at work and trying to hurry before break is over.