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Screwcap
04-16-2008, 09:48 PM
Hello,

I am new to the group but I have been looking to find stuff about my 1250s. I was wondering if anyone has done a full exhaust system and if so does any one have anything to say about the akrapovic full exhaust for this bike? Any info is will help. Played with cars in my time but first time tinkering with a motorcycle so don't mind if I am a little slow.

treybrad
04-16-2008, 10:59 PM
Dale Walker at Holeshot (www.holeshot.com) is working of his full system.

He's been posting over at Max-Suk (http://www.maximum-suzuki.com/forums/index.php/topic,64284.0.html). You have to be registered to view over there, but if you're not... here's stock vs. his results so far:

http://www.holeshot.com/bandit_post/1250dyno08.jpg

Yeah, that's almost 25hp and 10ft/lb tq over stock :eek:

Dale builds top-notch stuff, I've had his parts on my last two bikes and have been very impressed...

FWIW, Dale is very straight-forward and honest with his dyno results and research.. there's something about the Akra system that seems off... The weird dip in the power curve is completely missing from their dyno charts. Dale's working on fixing it, but why isn't it present at all for Akra? Makes me wonder if they just smoothed it over to make it look better...

trey

RDKR 350
04-17-2008, 04:31 AM
I use only a Akrapovic slip on.
But I have information of another biker who uses the full exhaust.
The noise is not too strong and the mass decreases from 13 kg to 6 kg.
The workmanship is of high quality as always with Akrapovic.
For the performance, see the Akrapovic curves .
Hi to all on TWT

RDKR 350

http://img180.imageshack.us/img180/4605/akrapovicgsf12qq5.jpg
http://img501.imageshack.us/img501/687/akrapovicgsf9uz0.jpghttp://img171.imageshack.us/img171/7135/akrapovicgsf10br2.gif
http://img180.imageshack.us/img180/115/akrapovicgsf8vp5.jpg
http://img180.imageshack.us/img180/6746/akrapovicgsf11qg5.jpg

sproggy
04-17-2008, 05:17 AM
Arrow do a full system for the 1250 and while I haven't tried it (it's top of my list since Holeshot failed to reply to my enquiries) I have used Arrow systems on a couple of other bikes and they're very well built.

http://www.arrow.it/eng/ricercaprodotti/vis_img.asp?file=../..//oggetti/2822_SP Suzuki Bandit 1250 07.jpg

The price is putting me off at the moment, particularly as I don't want a full system (I already have a Yoshimura can that I've very happy with and works with my panniers) but the temptation is strong.....and it's cheaper than the Akrapovic titanium system

Screwcap
04-17-2008, 08:30 AM
I have looked into the arrow exhaust but have only found it in the outside the US. I have heard holeshot is awesome but I think that impatients is getting to me. I went for a full yoshi system but they had quit selling it for the 1250s. If those dyno charts are true for the holeshot system though it would be worth the wait.

sproggy
04-17-2008, 11:07 AM
If those dyno charts are true for the holeshot system though it would be worth the wait.

I don't think there'll be much that the Holeshot system offers that Arrow/Akrapovic (and any others that come out in the mean time) don't. The main power gain comes from losing the catalytic converter - after that it's a case of balancing the pipes to optimise torque and power across the rev range. You may get a couple of horsepower/lbft difference between systems but I doubt it'll be noticeable on the road.

Remember that the Holeshot dyno chart is for a bike with ALL their mods - headers, can, filter, airbox, mapping changes etc whereas other manufacturers are highly unlikely to have optimised the rest of the bike in quite the same way when producing a dyno chart.

My choice will be purely down to price and availability - I trust that with proper setup the results will be close enough to the Holeshot figures as to make no difference. Anyway, I'm not chasing peak power (I'm old enough not to need to brag about figures in the pub) but improved rideability.

whitesands
04-24-2008, 04:36 PM
The akro's chart doesn't appear to be with a power commander or TFI so the numbers might be better with some tuning...

How much total weight loss is the full exhaust over stock ?

whitesands
04-24-2008, 05:32 PM
Dale Walker at Holeshot (www.holeshot.com) is working of his full system.

He's been posting over at Max-Suk (http://www.maximum-suzuki.com/forums/index.php/topic,64284.0.html). You have to be registered to view over there, but if you're not... here's stock vs. his results so far:

http://www.holeshot.com/bandit_post/1250dyno08.jpg

Yeah, that's almost 25hp and 10ft/lb tq over stock :eek:




Wow...85 ft.lbs torque at 2500 rpm!!!

Even in stock form it's making more torque than the concours 14 from 2500 to 3200 rpm...At 2,500 the stock bandit makes about 10ft. lbs more torque..With the full system and TFI it's 20 ft lbs's more than the stock concours....

Got this from Dale's post at maximum-suzuki....

"I'm snickering now guys because i spent 5 more hours on the dyno today and found something with the secondary butterflies. I'm not done yet..............but i am done for now and out of time.

134 HP @ 95 to 96 ft lbs 4 times ................not to bad for this sled"


That's a full exhaust, tfi box and no flies...Very minimal mods and huge gains...

Screwcap
04-24-2008, 07:51 PM
the weight listed by akro is 5.44 kgs and the stock is 15.1 kgs. The link to the manual is
http://www.akrapovic.com/typo3conf/ext/user_products/mod1/uploads/documents/c08bb000955662da1ef3f66205b9edc2.pdf
The difference they list is 9.66 kg or around 21 lbs lighter then the stock.

whitesands
04-25-2008, 02:17 PM
That's quite a bit lighter....I'm sure there has to be more gains with the Akro with some tuning...

sproggy
04-25-2008, 02:35 PM
Remember that weight saving is on a full titanium system compared to the stock stainless one - it's not just in the headers. I guess that 2/3 or so is saved by the can, the other 1/3 in the headers by losing the cat.

GregH
04-26-2008, 11:11 AM
What is the cost for the Akrapovic system? I can't find a US dealer with prices listed.

Screwcap
04-27-2008, 12:18 AM
The akra system is 1265.99 US Dollars. that is why i am waiting on buying the full. However you will not find it unless you contact Lockhart Phillips directly. Then they have to special order it and they will tell you it will take 6 to 8 weeks for delivery. If you get the run around just keep trying it took me a while to find this information out. When july rolls around i will probably decide on a system. sorry if this is hard to read i might be slightly inebriated.
best of luck in your search. ohhh and arrow has a full but the only place i found with it is in the U.K. and they didn't ship to the U.S. so if you want that system check out Canada importers and try your luck.

GregH
04-27-2008, 12:09 PM
Thanks, Screwcap. You came through loud and clear so have another drink! :mrgreen:
I'm waiting for Dale Walker's full system to come out to compare to Akrapovic's.
Then I'll begin negotiating with my wife for the funds - she's Chairman of the Appropriations Committee!

whitesands
04-28-2008, 07:53 PM
The no flies dyno chart will be interesting....96 ft. lbs torque...I'd like to see what it does in the low end...

rworm
04-29-2008, 05:27 AM
The no flies dyno chart will be interesting....96 ft. lbs torque...I'd like to see what it does in the low end...
It makes the low end hit harder/my flies are gone now
rworm

whitesands
04-29-2008, 11:52 AM
Have you adjusted the air/fuel ratio with a pc or tfi box ? Be careful because it could make it run very lean when you remove the flies without adjusting the fuel....

rworm
04-29-2008, 07:22 PM
Have you adjusted the air/fuel ratio with a pc or tfi box ? Be careful because it could make it run very lean when you remove the flies without adjusting the fuel....
READ PLUGS!!!!!
rworm

jdwinter001
08-11-2010, 02:38 PM
Reviving this thread? I'm intrigued by the looks of the Akrapovic slip on, but I am having trouble finding the cost for just that. Do any of you know it? I assume the $1300 price mentioned above is the full system (headers included).

Before I call the local dealer, I thought I'd bug you all...

Screwcap
08-12-2010, 12:16 AM
The akro sytem when I priced just the slip on was around 5 bills. My memory might be a little fogged but I am sure it was around there; give or take 50 bucks. When I talked to the distributors I was informed that if you go slip on now, you would still have to by a full system later. Something about compatability issues. The only one that offer a slip on to header is Dale Walker. Hindle told me it is still in development. The header is suppose to go with any slip on. I decided to try a mix of a two bros. slip on "that I picked up for 300.00" and a gut of the cat, with a power commander. I got it "tuned" and wasn't really impress with the experience but the numbers were optimistic at peak hp of 132.something and 87.something on torque. Still haven't hear much about arrow, hindle, or yoshi, but I guess that is what happens when you are riding one of 10 bandit 1250ses in arizona. (the last part might be a slight exageration)

Main point....If they list it in a catalog without a price or don't list it at all, call all the main lines for distribution and they will find someone willing to take your money and give you a product.

Fittysom'n
08-12-2010, 11:32 AM
I believe Dale's claims are...... optimistic.

With every step of upgrading my 1250, the only figures we have in common are our factory numbers sans mods. And his figures were generated at the same sea level and west coast conditions that I live in.

I don't have his full header system, but I do have a clean elimination of the CAT' from the OEM headers. My secondaries are removed, Dobek TFI with his settings in place, air box mod, K&N, TB's synched, valves recently checked, etc......

and my perfect air/fuel ratio registers on a DYNOJET a mere,
116 Max Power -with- 81.45 Max Torque

I'm just saying, do your mods with no anxious expectations, EXCEPT perhaps improved throttle response.

(By the way, I haven't added one of those gear indicators that does something to the advance...... I guess I could spend more money on the Bandit if I wanted)

whitesands
08-12-2010, 12:34 PM
Hey Fitty, did you do a stock dyno run as a baseline on the same dyno to see what the improvements were after you installed your mods ?

Perhaps the one you used reads a bit low or Dales reads a bit high or some sort of combination between the two...But I'm wondering what your stock run would have read on that dyno....Nevertheless, how much of an improvement were you able to notice by over stock ? Or do you think all the mods might be overrated ?

Fittysom'n
08-12-2010, 01:16 PM
Cutting to the chase, I think the mods are overrated. If I knew then what I know now, I woulda done nothing more than a 1" hole in the airbox and a 17" Street Holeshot slip-on. For suspension, nothing more than a forkbrace and replace the springs in the front tubes.

My base line run resulted in:

104.66 hp / 80.08 torque

when I stepped everything up I went to:

115.33 hp / 83.17 torque

with the CAT'less headers and secondaries removed:

116.00 hp / 81.45 torque

In the interest of full disclosure, the third reading was taken on the same type DYNOJET, but 20 miles removed from the first two runs. All at sea level, all under similar ambiant conditions.

Ga-Bandit
08-13-2010, 10:03 AM
I felt a in the pants throttle twisting BIG - HUGH - and I mean HUGH difference between Bluebandit's when he had the full Dale Walker stage 2 with aftermarket can and a catless stock header compared to my stock (ex for K&N filter) Bandit 1250.

At least my stock brakes puts his stainless braided lines to shame.

GregH
08-14-2010, 11:22 AM
So...who is exactly is "Hugh"? I'm wondering if he's huge. :mrgreen:

Ga-Bandit
08-14-2010, 08:19 PM
So...who is exactly is "Hugh"? I'm wondering if he's huge. :mrgreen:

It's like "Man that is bbbbaaaaddd" which actually means it's good. Hugh is a direct....oh, forget it.:giveup:

GregH
08-15-2010, 12:33 PM
I believe I have just figured it out. :mrgreen:

mountainmotor
08-20-2010, 10:48 AM
http://img180.imageshack.us/img180/6746/akrapovicgsf11qg5.jpg

Nice ! A modern GS standard . I wish they would have imported that model.

The Bandit 1250 as we know them has been discontinued . Looks like it will be the fully faired GSX1250FA if Suzuki brings them in for 2011.

Oh yeah , Hindle makes a header for the 1250 as well and i like the Arrow exhaust products but, the Akrapovic there is just plain studly . :rider:

streak07
08-20-2010, 01:40 PM
Do you just remove the muffler and pipe to find the cat in the header? Did you just drill it out with a hole saw or is there a better way to remove it fully?

PhilS
08-21-2010, 03:10 PM
Cutting to the chase, I think the mods are overrated. If I knew then what I know now, I woulda done nothing more than a 1" hole in the airbox and a 17" Street Holeshot slip-on. For suspension, nothing more than a forkbrace and replace the springs in the front tubes.


Ya know, Fitty, I'm gonna go with you on this one. Although the extra zing of the motor is nice, the amount of money and work to get there is not something I'd do again. I wasn't using the full hp/tq before the mod, thus, I am probably not using it in full after the mods. Meaning, I wasn't reaming this thing to red-line all the time before and clearly not now either.

The exhaust mod is a good one for sound only (to me). Being 250 lbs myself, taking some weight off the pipes is really pointless. I did it for sound and looks. The fork-brace, springs, rear shock, and great seat really should have been all I should have done. But, there's always next time.........

Just for fun, my next bike might remain 100% stock.........(unlikely)

mi1lertm
08-24-2010, 04:32 AM
Just had my bike out today and since it has been a while since I had a chance to ride it (17 months) I was a bit rusty (still am). However, the full exhaust W/out the secondaries still turns heads when it growls over 7K rpms. Whether or not it added this much or that much HP is not overly important. If I wanted lots of power there is a Busa or other Big bore bikes that will chew up tires and clean you clock. This bike still puts a smile on my face and is fast enough to be plenty of fun. Oh, and by the way, did I say that the full exhaust sounds great :)

Mark

Fittysom'n
08-24-2010, 07:24 AM
Allow me to share with y'all a recent discovery:

Absolutely the easiest way to double your fun, feel SIGNIFICANTLY more power from your 1255cc engine, and appreciate the smooth ride that big Bandit affords you.....

- is -

buy a used 400 pound 645cc two cylinder Suzuki SV650 and park it next to your big 600 pound Bandito!

I did, and after riding the little buzzy twin a couple hundred miles, climbing onto the four cylinder big-power Bandit gives you reason to fully appreciate such a smooth running torque monster that your 1250 is! Honest to God, the Bandit suddenly becomes scarry fast but planted....!

- conversely -

when ya feel like climbing onto a 'fun' toy to throw around, whipping through tight twisties effortlessly, and taking a little V-twin out for a spanking.... the compact 650 (w/suspension upgrades) will make ya feel young (and naughty) again.

Ga-Bandit
08-24-2010, 10:56 AM
Allow me to share with y'all a recent discovery:

Absolutely the easiest way to double your fun, feel SIGNIFICANTLY more power from your 1255cc engine, and appreciate the smooth ride that big Bandit affords you.....

- is -

buy a used 400 pound 645cc two cylinder Suzuki SV650 and park it next to your big 600 pound Bandito!

I did, and after riding the little buzzy twin a couple hundred miles, climbing onto the four cylinder big-power Bandit gives you reason to fully appreciate such a smooth running torque monster that your 1250 is! Honest to God, the Bandit suddenly becomes scarry fast but planted....!

- conversely -

when ya feel like climbing onto a 'fun' toy to throw around, whipping through tight twisties effortlessly, and taking a little V-twin out for a spanking.... the compact 650 (w/suspension upgrades) will make ya feel young (and naughty) again.

I went another approach for a lighter feeling:trust::rider::eek2:
http://www.twtex.com/forums/showpost.php?p=776658&postcount=6654

richyr46
05-10-2011, 10:11 AM
hi
what does a hole in the airbox do?
thanks
Richard

BlueStreak
05-10-2011, 10:16 AM
Allows the engine to intake more air, which means more fuel, too. An engine is basically a big pump. The more air-fuel mixture it can ingest, and in turn push out the exhaust, the more power it can make. So a freer flowing intake and exhaust allow for more power, assuming the amount of fuel is adjusted to match the increased airflow.

On carbed bikes, that means re-jetting. On fuel injected bikes, it means something like the Dobek TFI that Dale Walker sells, or the Power Commander, to remap the amount of fuel the computer tell the injectors to allow into the cylinder.

richyr46
05-10-2011, 10:20 AM
cool, so mpg goes down rapidly?! Is this a easy mod to carry out?

thanks
Richard

BlueStreak
05-10-2011, 10:24 AM
Allow me to share with y'all a recent discovery:

Absolutely the easiest way to double your fun, feel SIGNIFICANTLY more power from your 1255cc engine, and appreciate the smooth ride that big Bandit affords you.....

- is -

buy a used 400 pound 645cc two cylinder Suzuki SV650 and park it next to your big 600 pound Bandito!

I did, and after riding the little buzzy twin a couple hundred miles, climbing onto the four cylinder big-power Bandit gives you reason to fully appreciate such a smooth running torque monster that your 1250 is! Honest to God, the Bandit suddenly becomes scarry fast but planted....!

- conversely -

when ya feel like climbing onto a 'fun' toy to throw around, whipping through tight twisties effortlessly, and taking a little V-twin out for a spanking.... the compact 650 (w/suspension upgrades) will make ya feel young (and naughty) again.

Or do the opposite. Ride a much heavier bike, like a Honda ST1300 or other big sport tourer, and then the Bandit feels like that fun toy, easy to whip around the twisties.

BlueStreak
05-10-2011, 10:34 AM
cool, so mpg goes down rapidly?! Is this a easy mod to carry out?

thanks
Richard

Please note the part about rejetting or using a Dobek or Power Commander.

Yes, cutting a hole in the airbox lid is easy, but doing that without making any other changes is not a good idea. Your bike will almost certainly run too lean, risking serious engine damage.

The simplest way to go about this is probably to buy the Stage I setup from Dale Walker's Holeshot Performance:

http://www.holeshot.com/, then click on the Bandit 650/1250 link on the left, and the scroll down and click on the link for 1250 TFI tuning box.....Stage 1. This has all the parts you need, and clear instructions on what to do, and it's been dyno tested to work.

For a little more power, and a bit more work, there's the Stage II version. I think that to get the most of the the Stage II you probably need to replace the exhaust can, too, but it's not mandatory.

Note that neither of these changes is going to turn the Bandit into a GSXR killer. They'll add a bit more hp and torque, and improve rideability a little bit by smoothing out low-throttle response. And yes, they'll also reduce gas mileage.

Before making any changes, though, let me ask you what your goal is? In what ways is the stock Bandit not satisfactory? Answering that will help get you on the right track for modifications.

richyr46
05-10-2011, 02:07 PM
My Bandit is more than satisfactory, and frankly the low end torque is more useful to be in day to day riding than any big power that the top performing bikes have.
I was asking as I was intrigued, but thinking about it I am happy :sun:

BlueStreak
05-10-2011, 02:41 PM
And you saved yourself bunch of money you can now spend on gasoline!

rollinrob
05-10-2011, 02:54 PM
Allow me to share with y'all a recent discovery:

Absolutely the easiest way to double your fun, feel SIGNIFICANTLY more power from your 1255cc engine, and appreciate the smooth ride that big Bandit affords you.....

- is -

buy a used 400 pound 645cc two cylinder Suzuki SV650 and park it next to your big 600 pound Bandito!

I did, and after riding the little buzzy twin a couple hundred miles, climbing onto the four cylinder big-power Bandit gives you reason to fully appreciate such a smooth running torque monster that your 1250 is! Honest to God, the Bandit suddenly becomes scarry fast but planted....!

- conversely -

when ya feel like climbing onto a 'fun' toy to throw around, whipping through tight twisties effortlessly, and taking a little V-twin out for a spanking.... the compact 650 (w/suspension upgrades) will make ya feel young (and naughty) again.

I have a F650GS. It feels half the weight of the Bandit and I think it's a little more fun to zip around town on. Get on the Bandit and double the HP.

richyr46
05-10-2011, 03:06 PM
ah man, dont get me started on that! In london the price per litre is 135p!!!

aaron2597
08-11-2011, 01:06 AM
FYI Giannelli Silencers also makes a full system for the B1250s ;-)
I don't have any pricing but they have a dealer in Florida.
http://www.giannelli.com/eng/prodotti/details_pro.asp?id=691