Crazy engine!

[BridgeportCafe]

I have a 650E I just bought. I can't get the idle right. I cleaned the carbs and checked for prpper play in the throttle cable. I will be running individual air filters and have drilled 6 holes in the end of each muffler (to bypass the baffles). The idle will vary between 1000 and 3000 rpm and when reved the rpms fall off at around 5000, bogging down. The stock airbox has been removed. I made some makeshift filters out of an old sock and some hair ties to secure them to the carbs, just to add some air resistance. It was running worse before I cleaned the carbs but still not right. Any suggestions would be very helpfull to my nerves. [-o<

Thanks, i know this question's been asked a million X

 

[Big T]

I hate to say it, but your methodology is going to cause you nothing but problems.

You've already ruined the exhaust and choked the motor with socks as air filters. No wonder it won't run.

You need to try to go back as close to stock as you can manage. Your attempts at modification have no basis for improving performance. Who taught you to torture an engine like that??

There is absolutely no known combination of jets and needles that will work for this.

 

[bradleymaynar]

Oh that's harsh, Big T!

I'd say that you definitely need to adjust you needles. I can't say which way or the other, but it's probably the best plan. If you are able to return it to stock, I'd go that route first. If not, then you need to let us know if you're still on a stock exhaust. If your pods (individual filers) are unmodified. What, if any, work has been done to the carbs.

Swapping in pods to a stock exhaust is going to create headaches. Not to mention if you do the same to an aftermarket pipe. It has been suggested a "millionX" to try and leave it stock. Unless you have an aptitude for adjusting carbs with a freer flowing exhaust and a more open filter, you are best to leave it stock.

Hope this helps a bit.

Brad bt

 

[Dave8338]

WOW :shock: Well...anything is possible, the impossible just takes longer and costs a great deal more money! :-D The first thing that you're going to have to do is...get the pods on. Next, and this will be a trial and error exercise (here's the costs more part) is to get yourself a healthy selection of jets, all of them $$$$ and be prepared to pull the carbs apart ALOT, you'll have to start jetting. follow the directions in the link below, and don't take short cuts through the steps listed, as you'll be ripping your hair out. Also, get REAL comfortable with the term plug chops, you'll need it. http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

 

[Big T]

Okay, I was having a bad day and just had to listen to some BS from a contractor - where people come up with their ideas is still a mystery to me

So I wholeheartly apologize to you, Bridgeport

But you need to have an idea, then figure out how to get there before you start modifying

Do you want performance? Noise? Ratting out the bike?

 

[nabrams]

An approach you may want to seriously consider: Buy a non-running "parts bike" (from eBay or wherever else) that has stock carbs, exhaust and airbox - and use the stock set-up. This route will almost certainly be less costly. It will absolutely be much less aggravation, and you will be riding in a matter of days as opposed to a matter of months. Plus, you'll have an entire spare parts bike.

 

[koolaid_kid]

The carb tuning link is a good one. Be patient, and take your time. You must have the pods installed first (hopefully K&N and not Emgo) and start from the top down. Main jets first, needle position second, etc. It can be done. It just takes time and patience.

 

[ScottMc1100L]

Big T I see no reason why you should be apologizing. You were not harsh at all, truthfull really. This is BridgeportCafe's 1rst post. Assuming he knew of the site before he started drilling exhaust pipes and attaching socks on his carbs, he deserves a little ribbing!

 

[Nessism]

Big T I see no reason why you should be apologizing. You were not harsh at all, truthfull really. This is BridgeportCafe's 1rst post. Assuming he knew of the site before he started drilling exhaust pipes and attaching socks on his carbs, he deserves a little ribbing!

The number 1) newbie problem here at GSR is not using the search function.

Number 2) problem is taking off the stock airbox and expecting the bike to run properly.

Number 3) is same as no. 2) but with the exhaust.

For some reason people equate noise with power, which is not true. At very best by adding a pipe and pods WITH REJET the bike will make approximately 5-7% more power - hardly worth the cost and effort.

The only reasonable solution to rejetting issues like described is to purchase a pre-made jet kit like Dynojet. People that know what they are doing can do it on their own but if you are the type of person that doesn't understand why your bike does not run right after removing the airbox than you do not belong in this catagory.

Sorry to be harsh but this is about the 1000 post just like this.

 

[ratgs81750l]

haha ...i did the same thing drilled out exhaust installed pods and a dynojet stage three kit with the 124 mains and the bike runs AWESOME besides the fact she is now leaking oil and needs some gaskets the carb clean/rejett did good these guys are really smart but theyre old and they like stock everything. no offense :-D ive gotten TONS of advice off of here.

 

[Dave8338]

haha ...i did the same thing drilled out exhaust installed pods and a dynojet stage three kit with the 124 mains and the bike runs AWESOME besides the fact she is now leaking oil and needs some gaskets the carb clean/rejett did good these guys are really smart but theyre old and they like stock everything. no offense :-D ive gotten TONS of advice off of here.

Smart but old...I can live with that! Beter smart and old than young and dumb... :shock: Oh come on, someone other than me wanted to say that!! \\/

Rat, glad to here that you've got her up and running. You have to admit that with a little effort, the wrenching thing can be fun! Congrats on the GS!

 

[Pearson]

Smart but old...I can live with that! Beter smart and old than young and dumb... :shock: Oh come on, someone other than me wanted to say that!! \\/

Rat, glad to here that you've got her up and running. You have to admit that with a little effort, the wrenching thing can be fun! Congrats on the GS!

We're not old, we're seasoned...experienced I'd say. Da*n young 'uns.:razz:

ps: I think someone has got to be pulling our leg with that setup. Socks awright, who is it? Show yerself.

 

[bradleymaynar]

The number 1) newbie problem here at GSR is not using the search function.

Number 2) problem is taking off the stock airbox and expecting the bike to run properly.

Number 3) is same as no. 2) but with the exhaust.

For some reason people equate noise with power, which is not true. At very best by adding a pipe and pods WITH REJET the bike will make approximately 5-7% more power - hardly worth the cost and effort.

The only reasonable solution to rejetting issues like described is to purchase a pre-made jet kit like Dynojet. People that know what they are doing can do it on their own but if you are the type of person that doesn't understand why your bike does not run right after removing the airbox than you do not belong in this catagory.

Sorry to be harsh but this is about the 1000 post just like this.

My only reason for my "harsh" statement is to not chase off new members.

To add to the noise=power comment. When the can (muffler) decided to remove itself of my 1100, the bike sounded mean, but ran crappy. I've since replaced it with a Supertrapp and love the stealth it provides! Loud is bad for soooo many reasons. One of them being that it tends to draw the wrong attention!

And Rat, not to disagree, but from my experience here, it's easiest to mod a stock bike rather then mod before you seek help. Of course this only helps if you received a bike in stock condition first. Lord knows there are a multitude of old bikes for sale that quit running because of amateur mods! And you have to admit that there is time and patience involved in getting it all just right.

Brad bt

 

[49er]

Lord knows there are a multitude of old bikes for sale that quit running because of amateur mods! And you have to admit that there is time and patience involved in getting it all just right.

Brad bt

Yeah, that's why we're smart and old. We keep things mainly standard because we no longer have the patience to keep fixing or tuning it.
But don't let that stop you young'ns having a go and making your mark. We never used to listen either.\\/

 

[first timer]

BAH! stock is no fun, these are old bikes and your are going to have to mess with them any way you cut it, stock or not. But there is a right way and a wrong way to go about messing with things, but unfortunelty that knowledge only comes with good and bad experieces, no one ever got their bike running perfect the first time.

keep in mind it is easier to first make sure your bike is running well and everything is sorted out by keeping everything stock at first. then once everything is happy then go about modifying it to your hearts content. Ask lots of question first to make sure you are on the right path cause some here probly have already did that and messed it up or it worked out well before you.

do yourself a favor, if you truly want to run pods and a opened up exhaust then get yourself a dynojet jet kit

650
SUZ 81-82 GS650
3
3310
$125.89
-
-​

http://www.dynojet.com/jetkits/motorcycle/suzuki.aspx

it will take a lot of guess work out of setting up the carbs to run with out the air box.

also get the right K&N filters for your bike too, don't cheap out and get another brand, this will only cause trouble and headache. the jet kit is desighned only to run the K&N individual filters.

don't worry to much about the drilled out exhaust it shouldn't effect it to bad the stock exhaust is prety restrictive even with the holes, but if you are worried see about using some bolts to close off some of the holes you drilled.

the bike will run poorly any way you cut it with the air box and filter removed so you will either need to put it back or use the jet kit mentioned above.

STOCK SUCKS, MODS ROCK!

-RYAN

 

[49er]

Ryan
Using an aftermarket jet kit is cheating.
If you do enough research/brain picking, you can be innovative and sucessful with any engine tuning project. Research the correct ratios for jet oraface to choke/venturi cross section area and you're half way there. This of course is related to the ideal air/fuel ratio for efficient combustion.
If you're going to do the heavy mods, do your homework first, then go for it.
Bear in mind that the cost of more speed is never cheap.

 

[BridgeportCafe]

to all those who are "ribbing" me.....back off! I may be a newbie here at this site but not a newbie to mods. So don't go runnin yer mouths if you don't know the person. Sometimes ya gotta do what you can with what you have.

and a big thanks to the guys here that are backin me up. Yall gave me some valuable info instead of harpin on me. If someone could get me a part number for those K&N pods they'd be my best friend.

oh yeah, to all the old "stockers" out there....I respect ya as motorcyclists. I've been riding for 11 years. But I have to say, stock is boring. I want my bike to be a one of a kind and not just by appearance. These bikes are great platforms to be creative with.

Ps - I DID search thru the other posts for my problem before I posted. I didn't find an exact match to the symptoms.

 

[Dave8338]

Bridgeport...I'm the last to throw stones for a mod project, I think that my GS is the only toy in the stalls, that I've not moded. I just happen to think that when Suzuki built these bikes, they nailed it, right from the get go! \\/ That, and add a little nostalgia of having been around when they first hit the streets, and you have the perfect combo for a case of "leave it alone". :-D On the other hand, if you find one that you want to toy with, go nuts! Below is a link to K&N's web site. You will need to get the outside diameter of your carbs first. http://www.knfilters.com/universal/universal.htm

 

[first timer]

49er, yes you can do the jetting your self and spend lots of hours figuing it out and buy maore stuff then you need, or you can go the easier way and buy a kit that is design for specific mods that you are looking to do.

cafe is not looking to port or bore out, turbo his engine just run pods and a more open exhaust. so why waste time messing with a bunch of extra jets and stuff when someone elses has already, granted it's not plug and go and some fine tuning will be need but is better then buying a hand full of stuff and hope you got what you need.

cafe here is the k&N number:

1981 SUZUKI GS650E 650 - inc. 2 filtersMotorcycle / PowersportsClamp-On FilterRC-2382


you can do a search for then as well on the k and n website, rember all you need is one kit or box (2 filters come in the box) and one filter fits on 2 carbs at once.

you a southside chicago irishman by any chance?

 

[ratgs81750l]

Smart but old...I can live with that! Beter smart and old than young and dumb... :shock: Oh come on, someone other than me wanted to say that!! \\/

Rat, glad to here that you've got her up and running. You have to admit that with a little effort, the wrenching thing can be fun! Congrats on the GS!

my hats off to everyone who posts info on this site, it has helped more than you could know.:-D ..i remember there being a post on home painting and it had a list of materials and more or less explained in detail painting the tank n fenders and such. if anyone knows where thats at a link would be greatly appreciated...o and my bad for jacking your thread \\/