Seca/Maxim Difference?

Ok i'm just wondering (being new to the XJ) what is the diff between the Seca and the Maxim.

 

Seca "sport tourer", Maxim "chopper"

 

Thanks that's what i figured. But what diff parts do they have. I've noticed diff bars, chrome fenders, seats.

 

One I recently was enlightened by - Secas have dual front brakes and Maxims have a single - at least for the 82 model year.

The seats and tanks also differ.

 

I don't think "chopper" is the right term. Maybe "cruiser" is a better fit.

 

The seca 550 still had a single brake rotor up front and a drum in the rear.
Sean

 

Noted. Sorry I should have clarified the 82 year 650 model.

 

i also have had a little confusion with this one. as far as i know i have an 82 xj750 maxim, but it has dual front disk brakes. from the pics i've seen, it looks like a maxim, rounded tank, not the one with the indent on the sides. am i mistaken?

 

No, your not mistaken, that is a Maxim. The 750's had dual front disc brakes. Seca's use the exact same engine as the maxim with I have heard a difference in the final drive gear ratio in the tranny and a different mounting system. The Seca engine is directly mounted to it's double cradle racing frame. The Maxim uses rubber bushings. Yet both bikes use the exact same case. It is just the mounting hardware and frame mounts that are different. So a Maxim engine will go right in a Seca frame as long as you have the mounting bolts from the Seca and vise/versa.
I have also suspected that the timing curve in the Seca TCI is different than the Maxim but I don't know for sure. The Seca hides the front brake master cylinder behind the headlight where the Maxim mounts it on the handlebar. The Maxim also uses the 16 inch rear wheel for that cruiser look.

 

I have heard that the cam's are different also for different HP aspects

Sean

 

The 1982 Seca 650 has 4 degrees more duratind.3 mmm more lift, but was still a bit slower than the 1981 maxim 650? I believe 12.68 vs 12.61 Seca vs maxim. Might be a bit higher geared also. The bike that Cycle guide had only made 48 hp and 32 lb/ft torque and ran the 1/4 in 13.16, so i believe it is suspect as it was the slowest test bike that i have in my articles collection. Most ran between 12.68 and 12.98 at about 105 mph. Also most 650 XJ's I have seen dynoed (not many) have made about 50-55 rwhp. I have one article where they added a Yosh pipe, bore kit, cams and carb mods and ran high 11's with a 650 Seca. The original Yosh cams they used were for the 750 and had too much duration to work well with the CV carbs. The used a different set a couple of months later and ran about 1/10th quicker.

 

My bike used to be a Midnight Maxim.
I had to get rid of all that black.
The gold stuff was flakin'-off, so that stuff went; too.
It's got dual front disc brakes.
This Max is got a lot of pick-up.

It's got a cop motor, a seven hundred and forty-eight cubic-centimeter plant. Cop springs. Cop shocks. Cop suspension. Cop tires. It was a model made before catalytic converters, so it runs on regular gas.

What do you say?

Is it the new Bluesmobile or what?

 

Fix the cigarette lighter.

 

It's 106 miles to Chicago ...
we've got a full tank of gas ...
half a packet of cigarettes, ...
it's dark ...
and we're wearing sunglasses. -
Hit it.

We should hook-up and ride together!

 

Don't know about the larger bikes, but on the 400's the Seca is a 6-speed and the Maxim a 5-speed.

Cases are the same, but gearsets are different.

I forgot about this when I swapped a Maxim engine into my Seca and lost my top gear!

I'd like to get my 6-speed back for fuel economy reasons, so I'm still debating whether I:

1) Split the cases on both engines and swap the gearsets,

2) Swap the cylinders and head off the Maxim engine onto my seized Seca engine (which has a good bottom end - I think), or

3) Forget it and just ride.

I'm leaning toward #3, at least until there's a reason for me to pull the engine anyway.

Stay safe!
Herb

 

Man I would love to have a 6th gear :-(

 

So will the 82 Seca 650 out run a 82 Maxim 650?

 

Can't say for sure, but my Seca revs to 11000 rpm's and pulls all the way up. Wouldn't want to keep it there for long but it will do it. After a second thought, checked the road tests. The Seca ran 125 on the top end to the maxims 120. In the test with the higher 1/4 mile, the bike was fairly tired before they got it, so that can be thrown out as a low. Just reread a second test where it is actually the European bikes that got the hotter cams, statside engines are identical.

 

Just to bump this, can you revert from maxim to seca with the handlebars/tank? I like the more "sporty" look.

 

I wonder if the different gearing for the final drive is due to the different rear wheel size?

 

Searching these old post just brightened up my day

four fried chickens and a coke

 

I'd like 4 fried chickens and a coke.........You want thighs or breasts........No ma'am I want 4 fried chickens........and some dry white toast!!!!!!!

The BLUES BROS, shit , they owe you money fool.

 

My 82 Maxim has Dual's in the Front

 

650s have single, 750s have dual. And I've got 106 miles to Chicago, full tank of gas and a half pack of smokes.