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Author Topic: vance and hines exhaust  (Read 13791 times)

Offline lethal dose

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Re: vance and hines exhaust
« Reply #30 on: January 18, 2012, 03:27:00 PM »
Dogs a bit between 2500-3500 while at cruising speed. Smooths out as I roll on it. If I give it full throttle from the start, it rips with no hesitation. Seems to be dogging in the midrange. My guess is a midpipe and can will solve that.
« Last Edit: January 18, 2012, 05:57:07 PM by lethal dose »
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Offline rider123

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Re: vance and hines exhaust
« Reply #31 on: January 18, 2012, 03:33:05 PM »
Possibly, could be that he's running the needle artificially lean to compensate for a rich mainjet. Once you get the new mid-pipe on there with a slip-on then you'll be able to more accurately figure out what's going on. You could for fun turn the mixture screws out 1/4 of a turn to see if it helps in that transition range temporarily to the mains. You can always turn it back if it doesn't help you at least you'll know if you need to be richer or leaner there.
« Last Edit: January 18, 2012, 03:39:37 PM by rider123 »
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2005 Bandit 1200, Modified Holeshot Stage 1 with 17.5 pilots 2.75 turns out, and 110 mains 5 shims. Muzzy Slip on w/mid-pipe, stock filter. 1.5" hole in the airbox lid.

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Re: vance and hines exhaust
« Reply #32 on: January 18, 2012, 03:43:29 PM »
What's the easiest way to access the mixture screws on the b12?
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Offline rider123

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Re: vance and hines exhaust
« Reply #33 on: January 18, 2012, 03:48:37 PM »
I just use a discombobulated flat head screwdriver bit and a dental or hand mirror. Just note in your head where they are now so you can turn them back. Out is richer in is leaner. They should be in the front part of the carbs towards the engine side just in front of the floatbowls. Just grab a mirror and you should see the stalks and a brass flat head screw in there.

Here is a pic of my carbs which are slightly different with the mixture screw plugs still in tact:

« Last Edit: January 18, 2012, 04:16:55 PM by rider123 »
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2005 Bandit 1200, Modified Holeshot Stage 1 with 17.5 pilots 2.75 turns out, and 110 mains 5 shims. Muzzy Slip on w/mid-pipe, stock filter. 1.5" hole in the airbox lid.

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Re: vance and hines exhaust
« Reply #34 on: January 18, 2012, 03:50:19 PM »
Accessed through the same method as mains?
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Offline rider123

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Re: vance and hines exhaust
« Reply #35 on: January 18, 2012, 03:53:16 PM »
Nope you don't have to take anything apart you should be able to access them with the carbs and floatbowls still on there. Take a look at the pic. The thing called "A/F plug" should roughly be where the mixture screws are. Just remember the screws are "upside down" for the sake of the threads. So lefty loosy, righty tighty when say on the left hand side of the bike to turn out you would turn towards the engine case. On the right hand side to turn the screws out you would turn towards the rear of the bike.

Take a look at where the mixture screws are now and maybe mark them with a marker, then turn them out a 1/4 turn if you want to test that transition area.

Here is the microfiche for your bike. I don't have a pic unfortunately of the GEN1 carbs:

http://www.bikebandit.com/2000-suzuki-gsf1200sy-bandit/o/m6134#sch278348

Numbers 36 to 39 is the pilot screw assembly(number 42 is the plug) and as you can see its in the same location as the GEN2 bandit on an elongated stalk from the body of the carb. Get a hand mirror or something before poking around so you know what to adjust. Unless the previous owner didn't even bother to drill out the A/F screw plugs!! :duh:
« Last Edit: January 18, 2012, 04:16:11 PM by rider123 »
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2005 Bandit 1200, Modified Holeshot Stage 1 with 17.5 pilots 2.75 turns out, and 110 mains 5 shims. Muzzy Slip on w/mid-pipe, stock filter. 1.5" hole in the airbox lid.

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Re: vance and hines exhaust
« Reply #36 on: January 18, 2012, 05:59:36 PM »
took it for a good ride. the worst i notice it is in 5th gear at 50 mph at 3k rpm. also just found out the original owner dropped the front sprocket 1t. as soon as i roll on the throttle... it goes away. like i said, if i rip on it full throttle, there is no hesitation anywhere. only when cruising at about 3k.
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Re: vance and hines exhaust
« Reply #37 on: January 18, 2012, 06:02:48 PM »
man... listen to this kid's 600... unreal:
http://www.youtube.com/user/hurricanesupra/videos
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Offline rider123

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Re: vance and hines exhaust
« Reply #38 on: January 18, 2012, 06:59:47 PM »
Did you find the mixture screws and give it a 1/4 turn out to see if it will help you a bit?
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2005 Bandit 1200, Modified Holeshot Stage 1 with 17.5 pilots 2.75 turns out, and 110 mains 5 shims. Muzzy Slip on w/mid-pipe, stock filter. 1.5" hole in the airbox lid.

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Re: vance and hines exhaust
« Reply #39 on: January 18, 2012, 07:33:26 PM »
not yet... really don't feel like messing with it tonight. what i'll probably do is sell my two brothers cans and pick up the danmoto and go from there. heck, might solve the problem. if not, i'll start tweaking.  :beers:
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Offline rider123

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Re: vance and hines exhaust
« Reply #40 on: January 19, 2012, 01:45:48 AM »
Yeah its a good idea, there really is no point until you're happy with the exhaust situation. Once it's on there you'll have a better idea of what needs to happen anyway. It sounds to me that the cruise might be a little lean but you won't know until all your ducks are in a row. Even not %100 it's not like these bikes are slow. Probably a 1/4 turn out would help in that transition area but like I said it's possible the needle is set a notch too lean to compensate for a rich mainjet. Best to leave it until all is good.
« Last Edit: January 19, 2012, 01:47:31 AM by rider123 »
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2005 Bandit 1200, Modified Holeshot Stage 1 with 17.5 pilots 2.75 turns out, and 110 mains 5 shims. Muzzy Slip on w/mid-pipe, stock filter. 1.5" hole in the airbox lid.

Offline rider123

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Re: vance and hines exhaust
« Reply #41 on: January 20, 2012, 03:21:58 PM »
Just a heads up for you Dan Moto is in the States now and offer free shipping in the lower 48!!


http://www.dan-moto.com/DM_US/gsf-bandit-600-1200-n-s-wholesale-18_20_58.html

Prices slightly higher but with no shipping costs which is a bonus.
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2005 Bandit 1200, Modified Holeshot Stage 1 with 17.5 pilots 2.75 turns out, and 110 mains 5 shims. Muzzy Slip on w/mid-pipe, stock filter. 1.5" hole in the airbox lid.
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