Exhaust Mod advice please

Im thinking of changing the Exhaust on my bike what do you giys think about this sets?

http://seattle.craigslist.org/est/mcy/2347532287.html

http://seattle.craigslist.org/sno/mcy/2344981443.html

Im not sure if the Supertrapp would work on my XJ750SECA

but What abouit the other ones? They come from a 750 as well.

Thanks for you opinion!!

 

You might be looking at some cutting and welding. Thats not a huge deal.

 

I'm afraid that the with the supertrapp ?

 

Sorry I mixed my toughts. You mean with the supertrapps?

 

either one

 

Your going to need some measurements to see if either of those will leave room for the center stand should you want to continue using it.
The headers and collector box also bolt under the engine to help support it, so you may want to keep that in mind when going with another system to find an alternative way to support it.

 

The other exhaust system came off a Moto Guzzi 750 twin.

While anything can be made to fit, I don't see either of those as a "bolt-up" option.

Depends on how much re-engineering and modifying you want to get into.

 

That's true. I guess I'm more worried about if I need to re jet the carbs or just a tune up would do it. I feel like the breva exhaust would be a better fit in that aspect but Im kind of inclined to buy the supertrapp because the sound and more flexibility to adjust. But the truth is that I'm just espacultiang and that is why I need the advice.

Do you have any experience whith supertrapp exhaust?

Thanks for your input.

 

I put a supertrapp on my baby bandit (250cc) and it was great. I didn't have to change anything with the carbs/airbox set up. I was able to adjust the plates on the end with minimal effort, and after a few rides, I had it tuned in perfectly. The only negative drawback I can think of is the noise. That bike was loud. People covered ears, jumped out of the way when I was going through town, ran away, it kept me entertained.

I am actually thinking of the supertrapp route for the seca750. As long as I dont have to mess with carbs/airbox again, i'd be happy for that noise in my life once again.

 

LOL I will let you know what I get!

 

a tune up is not going to fix jetting issues.

if you change any part of the intake or exhaust, you will need to rejet, especially if it still has stock jetting from the 80's.

the supertrapp can have discs removed or added and you might be able to tune the muffler to the carbs current jetting close enough to only require a little tweaking with the pilot screw or a shim of the needle.

 

I went to check the supertrapp Shorties and they were to short. The guzzi exhaust are nice but a little expensive. Then I saw thisones on Ebay. I think I will get them. They are even angled already!

 

OK I got this suppertrapp. Im excited to see the performance improvement with these mufflers.

 

i use 6 plates on a mac 4/1 with 128 mains and 41 pilots, things happen fast after 6K

 

What sizes are the stock main and pilot?

 

120 main and 40 pilot

 

Well, Supertrapps have been installed. Cleaned my carbs and sincronized. I am susing only 5 plates with stock jets. Runs smooth smooth!!! I will change the jets because I have almost 4 turns out and the plugs are barely tan.

I do like the sound but not much diffrence from the stock exhaust. I do feel more power though but the main benefit is the smoothness when im on the highway. Almost no vibration.

 

Well, Supertrapps have been installed. Cleaned my carbs and sincronized. I am susing only 5 plates with stock jets. Runs smooth smooth!!! I will change the jets because I have almost 4 turns out and the plugs are barely tan.

I do like the sound but not much diffrence from the stock exhaust. I do feel more power though but the main benefit is the smoothness when im on the highway. Almost no vibration.

 

It's probably more a result of the carbs being sync'ed than the pipes, honest.

 

I need pics - of Stainless supertrapps, correctly bent?? Installed !! Oooh - Jealous !

 

BigFitz. I think is a combination of both. May be more the sync than the exhaust but definetly the exhaust helped because before syncronized I went for a ride and I felt improvement.

TIMEtoRIDE they were already bent. I was lucky to find them already like that. Even the bracket wass in the right position. They were almost true slip ons. I will post pics as soon as I clean the new beast unleashed!!