GStwin.com GS500 Message Forum

Just for the record. I still do the advancer mod.
The new GS500F has a completely different rotor so I can't modify it.
Just send your rotor and $5.00 to me and I'l modify it and send it back.
I was sending an advancer first and getting the stock one in return. but somehow people forget to send their rotor and money, so I ran out of extra rotors.
My address is;
Bob Broussard
761 Alvarado Dr.
Salinas, CA. 93907

Email; bobbroussard@x.cx

Good to hear from you again. I haven't seen you post as much lately.

It's a shame people weren't sending their rotors & money. Bob's work & service is greatly appreciated by all those who have taken advantage of this awesome mod. I think this was actually my first mod :cheers: .

If onlye there were more people like Bob & Kerry offering their time, service, or tools essentially for free for the good of helping others in our beloved gstwin community.

Thanks again. :thumb:

Thanks for posting this. I have a couple that need to be modded.

If I had an extra rotor or time that the bike could be down I would send it tommorrow.... but damnit.. I dont


Grrrrr

Bob,

What exacty do you need sent to you?

(Just the advancer mentioned in link below)

http://www.gstwin.com/ignition.htm

Quote from: alabrasaBob,

What exacty do you need sent to you?

(Just the advancer mentioned in link below)

http://www.gstwin.com/ignition.htm

This is essentially it:

What exactly are the benefits to this mod?  I understand how it advances the spark timing and I also understand it makes the engine run cooler, but are asperation changes needed i.e. intake box, re-jetting and exhaust?  How would this mod effect a otherwise stock bike?

Quote from: Stephen072774What exactly are the benefits to this mod?  I understand how it advances the spark timing and I also understand it makes the engine run cooler, but are asperation changes needed i.e. intake box, re-jetting and exhaust?  How would this mod effect a otherwise stock bike?

Big bad Bob.  Nice to hear from you.   :thumb:

Stephen, maybe you should go to the Mods & How To section & read about the advancer replacement.  Just click on the little box that says "Go To" on the top right hand part of the page and select "Mods & How To"

i already have A V&H, and i think i have 2 stock ones, what are the specs on the stock,V&H, and BB models?  how many degrees advanced that is

Quote from: Blueknytwhat are the specs on the stock,V&H, and BB models?  how many degrees advanced that is

Check out Bob's two posts starting HERE.

I modify the stock rotor to the V&H specs.
So the timing is advanced to 17 degrees.
A noticeable difference from the 12 degree rotors and a huge difference from the 5 degree rotor on the CA. models.

I haven't been posting on the board for awhile. But I do check in often.
Been busy building another bike with some newer pieces.
2004 gsxr 1000 frontend
2002 gsxr 1000 swingarm
99 tz250 Marchesini rear wheel
Ohlins shock (96-99 gsxr)
Vortex rearsets (04 gsxr 1000)
Lots of cutting and welding  ;)
Maybe Kerry could help me post some pics in a post some day :dunno:

Quote from: Bob BroussardMaybe Kerry could help me post some pics in a post some day :dunno:

Any time!  :)

Hey Bob
I'm here in Australia, would very much like an advancer but to send my rotor over would leave me bikeless for atleast a month, is it possible for you to find a rotor over there,modify it and bill me for the rotor,your time and the postage, if so any idea  what the cost is likely to be. I havent checked to see how much a rotor will cost over here to be able to send to you but if it's like most other part's it will be twice as dear as you can get one for over there. I understand fully if it's too much of a hassel, by what you charge I relise your doing this as a service to fellow rider's.
Regard's  :thumb:

I have about 6 or so stock rotors. Not sure how many I am going to send to Bob to modify but maybe I can help you out.

Interested in this. Since I have to give you my rotor, just wondering what the turn around time is.

turn around time is about a week.  I sent mine to Bob from PA, It cost me like 5.40 to send priority mail and had it back in just about a week's time.

jake

I have 2 spare modified rotors on hand. So I can send the advancer first instead of waiting for yours. This is only for someone that can't do without their bike. In the past I've run out of rotors because some people never sent theirs to me in return.  :nono:
So Aussie GS, PM me with your address and I'll send one out  :thumb:

Normal turnaround time is 1 week from the day you send the rotor in the US.

:)  Really really appreciated this and I guarntee I will send you my rotor by registered post to make sure it gets to you soon as the modified one arrives. Many thanks  :thumb:

Thanks also dgyver for the offer to help out also very appreciated  :cheers:

Here's another question for this thread. The 04 US model shows it has a 5 degree advance and all other models show a 12 degree. So, could the ignition  advancer from all other 04 models fit the US model, and if not what's the difference? And would this be beneficial or is this too much of an advance for the US model?

(http://server2.uploadit.org/files/tdan553527-8.jpg)

The 04 model rotor is completely different than any other GS year.
I can't modify them. But if you could get an 04 rotor with the 12 degree advance, that would work just fine.
I wasn't aware Suzuki had 2 specs, but it makes sense that the US model would be less advanced to meet smog regs.
I'd go for it :)

Bob just recently did my advance...took a week, and he does an EXCELLENT job, I couldn't even tell he did something to the rotor, the fill, the new slot, painted black, all top notch- if you told me it was V&H advancer I'd believe you...and I notice the low end response, a bit quicker on the throttle, not as much hesitation...and with a V&H exhaust, I'm even noticing a bit more "burbling" at deceleration...not that I mind, it's just something a bit different. THANKS BOB!

Quote from: Kee on January 12, 2005, 11:43:31 AM
Interested in this. Since I have to give you my rotor, just wondering what the turn around time is.

Generally a week from the time you send it. ;)

Bob, just checking to see if this offer is still open, and if it's still 5 bucks since the shipping costs may have gone up

Bob,

You mentioned that you cannot do the mod on a newer GS. Does that include the 2005 model? Just curious, if you can than I am wicked interested.

Cheers,

Howie

I believe anything newer than 2001 has the newer style rotor. If you take the cover off and it has just 1 tab that spins past 2 ignition pickups, I CAN modify that.
The newer style has 1 ignition pickup and the rotor has a bunch of tabs on it. NO CAN DO! :dunno_white:
You might be able to move the backing plate, by slotting the mounting holes and rotating it forward. ;)

[4

I just wanted to let everybody know, I had the opportunity to meet Bob in person last week.  I was on a road trip that took me through Salinas, and he generously took time out of his day to do TWO ignition advancers for me on the spot when I got there.  First of all, Bob left his work site to come and do this for me, taking a couple hours out of his day to do me a favor so me and my buddy wouldn't have to be without our bikes.  He's got an incredible set-up in his garage, all the right machinery and tools to do this job professionally.  The equipment must've cost a ton, and he is extremely precise, careful, and patient at his work, measuring again and again and again to make sure things are crafted correctly; an obvious true craftsman.  The finished product is indistinguishable from retail, and a testament to his level of care.

I wanted to stress that, even with all the right equipment set up like a production line, it took him over 40 minutes of hard work to do each one.  So I would strongly urge you to send Bob more than $5 for his time and labor, as I'm sure many of you would pay the full cost of a V&H if they were still making them.  I noticed a big difference in the low end of my California bike, and found that I didn't have to downshift to 1st when making slower turns, parking lots are less annoying, and I could pull away smoothly at 2,500 RPM instead of bogging like before, which IMO makes it a safer more predictable bike for this beginner.  Bob's happy to do it for $5 and doesn't seem comfortable asking for more than shipping, but he shared with me his desire to re-ignite his racing career (he's put in a couple champion seasons but took last season off).  It's an expensive thing to do, but it's his passion, so if you can afford to chip in more than $5, I'm sure he'd appreciate it.

:cheers: Bob!  Thanks for my custom Broussard advancer.

-tslugmo

4f

BobB is da man!  :bowdown:

Someday I will get around to sending him several more rotors. I will have a little extra something in the box for him.

[h

I've been running one of bob's advancers for a few years and it's great.  the quality is top notch.  I've never been fortunate enough to actually meet Bob but we've exchanged enough dialogue (him helping me out) for me to know that he's a stand up guy and another one of those dying breeds that we could learn a lot from.  thanks again bob - you are definitely the man!

Aussie GS: How is it going? How much difference does it make?

Bob: Are you still able to send them to AU? I can paypal you for the trouble.

James

It revs up much easier, getting you into the powerband much sooner, and it makes the throttle much more responsive.

OK, I'm sold. I'd like to purchase one (can't have my commuter down a week) from you if I could. Or send a deposit for a modified one until I can swap them. Guess I'm PM you about it.  :thumb:

Does anybody know where I can get a spare rotor?

Hi Bob.
I know that in the beginning of this post you said you can't mod the F version's ignition advancer. But since it's been four years since that statement I'd like to ask if you now can modify the 04's advancer? or if you know how to do that and could share the method with me. my father works in a auto body shop and he's got the appropriate tools I believe. I just need some instructions hotw to perform this modification.
thank you very much in advance
Kamel

Quotehe's a stand up guy and another one of those dying breeds that we could learn a lot from.  thanks again bob - you are definitely the man!

+1. I was very impressed with my new ignition advancer. All painted and ready to go. Works great, and for just 5 bucks! You don't find honest people like that just anywhere.  :cheers:

Did anyone with the 2001-08 American 5 degree ignition upgrade to an overseas 12 degree part with success?

is there a way to tell if you have a 5 degree or 12 degree ignition rotor?

I read somewhere that the Euro or Uk bikes are allready Advanced , its just the US models that need to have the mod done

Yeah, just wondering if any US riders have fitted the overseas ignition rotor?

(http://i90.photobucket.com/albums/k248/galahs/gs500f/rotor_cover_removed.jpg)


(http://i90.photobucket.com/albums/k248/galahs/gs500f/rotor_2005_australian.jpg)


Here's the pics of my 2005 Australian ignition rotor.

As you can see there is a number 12 stamped on there. I'm guessing that means 12 degrees advance???????

Okay, someone had to ask... Does installing an IA cause any downward effect on fuel economy??

Quote from: El motociclista on March 27, 2008, 11:01:21 PM
Okay, someone had to ask... Does installing an IA cause any downward effect on fuel economy??

If you have the stock exhaust and air filter,it may knock a couple mpg off.If they're not prolly 45 to 55 mpg.Depends on your riding habits.

BOB!

Still doing these?  Im just south of you in San Luis Obispo and have my bike down for repairs/upgrades and would love to do this! 

And of course there will be more than $5 in the box - Ive gotta pay you for your time!  ;)

Thanks!

It's best to message him.He rarely comes to the forums anymore.

I get email notices when someone posts on this topic ;)
So I do check in occasionally.

Right now I have a 550 motor with Wiseco pistons in my bike. Uni pod filters, advancer, V&H pipe, jetted carbs.
I got 61 mpg freeway (70-80) and 54mpg racing around the Santa Cruz mountains.
So apparently it won't hurt milage :icon_mrgreen:

MAKE SURE you ONLY send the ROTOR. Not the backing plate like in the DIY section.

You can also PM me or email at bobbroussard@x.cx

One way or another you'll get a response :thumb:

And YES I'm still doing them for anyone :cheers:

550cc??? I'm not sure I wanna know but how did you get an even 550cc?

I wanna no to  :thumb:

Quote from: Bob Broussard on June 15, 2008, 10:34:04 PM
MAKE SURE you ONLY send the ROTOR. Not the backing plate like in the DIY section.

Hmmm.... I wonder who made this mistake? 

Got mine back from Bob and it really seems to have smoothed out some low RPM hesitation I was having.  Send some extra money w/ the package.   :)

Mine is going out in the morning.  Thanks Bob!

Actually it's a 541cc motor with 78mm wiseco pistons.
79mm would be 555cc (maximum possible without re-sleeving)
every mm bore over stock adds 13cc. Stock bore is 74mm
It required some head work to fit the pistons and a slight modification to the piston for valve clearence. Other than that it's stock.
Pulls very strong. Had it past 130 and still pulling, but was going past redline with the gearing I have. I'm going to put the stock countersprocket back on and see how it feels.

Quote from: Bob Broussard on June 16, 2008, 10:15:15 PM
Actually it's a 541cc motor with 78mm wiseco pistons.
79mm would be 555cc (maximum possible without re-sleeving)
every mm bore over stock adds 13cc. Stock bore is 74mm
It required some head work to fit the pistons and a slight modification to the piston for valve clearence. Other than that it's stock.
Pulls very strong. Had it past 130 and still pulling, but was going past redline with the gearing I have. I'm going to put the stock countersprocket back on and see how it feels.

Dgyver explained all that to me last year when I got my bike.That's why I was questioning the 550.I know you know that there's no even 550,but you've come up with some cleaver tricks.Thought maybe there would be some black magic involved with getting to the 550.Maybe longer rods,cylinder base shim,bat hormones,devils hair,your basic black magic mixed in with a little mechanical knowledge.Poof 550cc!It's alive!!!! MMMWWWHHAAAA HHHAAA!!  :icon_twisted:

Well it was my theory anyway.  :laugh:

Quote from: galahs on March 27, 2008, 04:14:20 AM
(http://i90.photobucket.com/albums/k248/galahs/gs500f/rotor_cover_removed.jpg)


(http://i90.photobucket.com/albums/k248/galahs/gs500f/rotor_2005_australian.jpg)


Here's the pics of my 2005 Australian ignition rotor.

As you can see there is a number 12 stamped on there. I'm guessing that means 12 degrees advance???????

hey can you find out from your local dealer what the part # would be?

Maybe if you want Ill send you paypal, $$ and maybe you could buy/ship 12' one back to me ? (grin)....

I checked local web site and they show only one rotor part # and not if 5 or 12' advance.
ROTOR,SIGNAL 2918027-001  , I would assume 5'BTC

can you advance the ignition on a 2008 GS500F? it seems like there are so many different types for all the different years, im so confused lol.

once i get mine pulled ill be sending it that way ill let you know tho

Quote from: HPI_Freak on January 05, 2009, 12:04:36 AM
can you advance the ignition on a 2008 GS500F? it seems like there are so many different types for all the different years, im so confused lol.

PM him. I believe he can cos he put the pics up with an 04+ rotor.
Cool.
Buddha.

Okay, here's the deal.

I modified an 05 rotor from a motor I bought. Since I use the older style ignition on the 05 motor, I couldn't test it myself. I sent it to someone and they said it seemed to work. They sent their stock rotor back to me.
I modified that and sent it out. I never got an answer if it worked and never got anything back.
So, until I can come up with another rotor and do more testing, I don't feel confident enough to start modifying them like the older rotors :sad:.
Which I still do :thumb:

So a 2002 naked Canadian version, could it be done?  I am slightly confused?

Chris

I can do the older style rotors. They have a single tab sticking out on the rotor and 2 ignition pickups.
The newer style has multiple tabs on the rotor and only 1 ignition pickup.

It doesn't matter where the bike is from. Just look at the rotor.
1 tab--no problem :thumb:

THanks to Bob for all the work he puts in... I just sent him my rotor last week after contacting him thru email. I wasnt sure if he was still doing the mods. THnaks a lot, i cant wait to try it on.  :woohoo:

Bob,are you still doing the ignition advance mod on the gs?
I have a 93 I'm prepping for the track.
Cheers,
Tag

Considering that his last log in was April of last year, I'm guessing no, but you can try a PM or email.
He most likely will never see your post.

I have sent him an email. Hopefully he gets back to me.

Well I got an email back that his inbox for his email is full FML. Anyone know of another way to contact him!!! I really need this mod done.

Quote from: Hoopes91 on January 21, 2015, 08:52:11 AM
Well I got an email back that his inbox for his email is full FML. Anyone know of another way to contact him!!! I really need this mod done.

I have his email from 2007 when we were discussing the 4-valve head. PM me for it. I would rather not post it without his permission.