want bigger tank 4 a 83 xj650

i have a 83 xj650 and i want a xj750 maxim tank. it is a bigger tank that will just bolt on.

 

Maxim or Seca?

If you have a Maxim, I believe you can swap in a tank from a 750 and gain almost a gallon. I could be wrong though, so make sure to measure well before you run out and buy one...

 

maxim

 

I have a 1981 XJ650J Maxim and I bought a 1982 XJ750 tank to replace mine. You gain a gallon on the top, and I think 1/4 gallon on the reserve. I will tell you this...it makes the bike more top-heavy after a fillup. An extra 8-10lbs. up there makes a difference.

Anyhow, I get roughly 120 miles on the top and 30-40 miles on the reserve. The farthest I've ever ridden on a single tank was 165 miles. I've never been able to duplicate that so I've written it down to my spring fill-up of 94 octane. I work at the refinery and fill up at our flagship station. I know that sometimes we have to dump octane to get rid of it. It always goes to the 94 octane tanks and can sometimes get as high as 98.

 

Too bad you'd have to have a custom tank made for a Seca or I'd consider a swap. (The Maxim tank would look all wrong on a Seca.)

Now I don't feel so bad because that's about what I get out of my Seca. I thought I was doing poorly because other people, like a guy at work with a CBR600, are getting 180+ on a tank of gas.

What I wouldn't give for a bolt-on aftermarket EFI system. Hmm....

*starts doodling ideas*

It would be an awful lot of work but you could do it using something like this kit:

http://www.megasquirt.info/

 

Don't forget the loss in efficiency resulting from the shaft drive. The CBR600 is chain driven.

 

My dad's had chain drive bikes for years and to tell you the truth I don't miss having a chain one bit.