Are all xj750's created equal?

Will the carbs off of a 1983 XJ750 Midnight Maxim fit a 1982 XJ750 Seca? Is there somewhere that has a XJ parts crossover list? :?:

 

Yes, they will!

 

So am I correct in saying that all XJ750's are compatible (at least the engine) between the years of 1981-1983

 

120 main jets and 40 pilots
a y-13 needle, i think.

 

The best way to check, part by part, is to use an online microfiche, and compare part numbers between the "R" and the other XJ750 models in that year (or years.) If it's the same, it will have the same part number (most of the time.)

 

Maxim's have slightly milder cams and a tad taller overall gearing.
I think a Maxim motor in a Seca would be a good swap for better fuel economy, or a Seca rear rim installed on a Maxim.

 

While I agree with this, i have to say... I'll take the bad gas mileage on a bike that'll pop the nose Now if only I can figure out how to consistantly clutch it up....

 

What kind of gas milage are you getting on your bike? (should this be another thread?)

 

I never fill my bike all the way up (skeered of splashing gas on my tank), so I'm not sure how to get an accurate calculation. Would keeping tabs on the GPM help in recognizing a problem? Do you factor in the engine warm up time (choke on) in your calculation?

I've started a habit. I put the bike in Neutral, start it with the choke on, perform a walk around looking for dripping fluid, listen to the engine, check the exhaust, the lights, turn signals, and tires. Put my gear on, turn off the choke, then get on the bike and go.

 

So what you are saying is if I put a Seca final drive on my Maxim I will get more top end. Will it be noticeable?

 

nope grim I have checked same p/n between the two bikes

 

The Seca's rear wheel is a 120/90/18. Maxim runs a 130/90/16. That's about a 5% difference, which gives the Seca a bit more top end. On the other hand, the 120/90/18 tire is almost an inch narrower, so you don't have quite as much rubber on the ground.

 

I swap out a Maxim rear wheel for the Seca wheel when I go for short rides around here. The Seca wheel is for longer trips and better top end (less rpm) and better fuel mileage. The 650 Maxim wheel fits perfect onto a 750 Seca.

 

You can put a 130 width tire on the Seca.

I have a 130 dunlop GT501 on mine.

 

Ease,

You got a 130 on a 18 in. rim? no clearance issues with the driveshaft? 8O

 

Yup, it just makes it past the differential housing with a litttle push. Plenty of room next to the drive shaft too.

 

cool! then I can go back to the Seca rim... I just always thought the 18 in. rim was too narrow for a 130.

 

I think if you dig deep enough into the Technical Data you'll find that the Seca is a faster bike.

Although I wouldn't swear to it under Oath ... I think the Seca's have a little bit hotter Cam.

In lane one ... the 750 Max
In lane two ... the 750 Seca.

White, white
Red
Red
Yellow
Green

Looks like the Seca edged-out the Max after the quarter-mile run.
Gotta be a reason.
Must be those Cams.

 

Aw, damn... Sorry, seems I was wrong... Had to check b/c I could have sowrn it was a 130.

It's a 120...

Hope noone ran out and bought a 130 on my advice.

Anyway there is a decent amount of space between the shaft now, but looks like a 130 wouldn't fit without some modification.

 

umm...guys...RIMS come in different widths too, and limit how wide a tire can be fitted. Your rim has its width number (ie; 2.15) cast onto it.

 

I noticed that the 16" rim is about an inch wider than the 18" Seca variant... I also found out today that some Cheng Shin 120/90/18 tires are actually almost as wide as 130's. Apparently following standards is optional in Taiwan...