• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

issues with my 1980 GS 850 with stage 3 Dynojet

  • Thread starter Thread starter fer_gloko
  • Start date Start date
F

fer_gloko

Guest
I'm having issues with my 1980 GS 850 with Dynojet stage 3 165 main jets, I've cleaned the carbs recently.

When I get to 4500-6000 RPMs it bogs down and it slowly accelerates but you can definitely feel the difference.

I have a 4 to 1 Vance & Hines exhaust with pods. I understand the bike is running too lean with the 165 main jets, my question is

would you recommend going down to stage 1 and change the main jets to 155? and based on that its just going to be a trial and error base diagnostic?
 
Im assuming stage 1 based on what this says, and how lean the bike is running at those RPMs

"STAGE 3 Dynojet Kit Fits 80-83 Suzuki GS850 8-Valve (all) Kit Includes (4) 155 Main Jets, (4) 160 Main Jets, (4) 165 Main Jets, (4) Main Air Corrector, (4) Fuel Needles, (4) Adjusting Washers, (4) E-Clips, (1) Tool, (1) Glue, (1) Screw, (1) Slide Drill, (1) Plug Drill

Information:
STAGE 1: Intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe. Stage 1 kits are fully adjustable to allow the use of a well designed aftermarket pipes and stock replacement air filters like K&N. Stage 1 kits are designed to improve throttle response and driveability and in most cases power increases of approximately 5% throughout the entire power range can be achieved.

STAGE 2: Intended for motorcycles with a stock or mildly tuned engine using a well designed aftermarket pipe with a modified airbox and a stock replacement air filter. Stage 2 kits are designed for applications where individual filters cannot be installed and for applications where airbox modification improves the engine's performance. In most cases power increases of approximately 8% can be achieved.

STAGE 3: Intended for motorcycles with stock or mildly tuned engines using a well designed aftermarket pipe and individual air filters. In most cases power increases of 10-15% can be achieved."

http://www.z1enterprises.com/ItemDetails.aspx?item=DJ3306

http://www.starcycle.com/catalog/DJ_3306.pdf
 
Steve said:
If you are running lean with 165s, how do you think you are going to fix it wth 155s?

.
Click to expand...

I have no idea, I figured since stock is 115 and the 165 is letting too much fuel and not burning that anything smaller than 165 would help. I'm new to motorcycles so I'm just asking for advice
 
It is possible that your petcock is not flowing enough fuel to the carburetors. Do you have an inline fuel filter between petcock and carburetors?
Have you done basic maintenance to the bike (adjusted valves, verified that timing is correct..etc)? When you cleaned the carburetors did you
take them completely apart or just spray them with carburetor cleaner?
 
almarconi said:
It is possible that your petcock is not flowing enough fuel to the carburetors. Do you have an inline fuel filter between petcock and carburetors?
Have you done basic maintenance to the bike (adjusted valves, verified that timing is correct..etc)? When you cleaned the carburetors did you
take them completely apart or just spray them with carburetor cleaner?
Click to expand...

Yes I adjusted the valves and checked compression on the bike, everything is in great shape, besides this issue
 
No I haven't how many turns or how do you suggest I do so?
 
neeeeedle not mixture.
the needle is in your slides.
there is grooves in the needles.
there is an e clip that snaps in the groove.
where is it now and where does dynajet say to install it?
 
i used 160 mains cant remember the the clip position, but i would start in the middle, i ended up using the stock pilot jets, with the top mixture screws 4 turns out from the bottom.
 
the snap rings out can be a mother...
i use hemo stats that i modified the tips just a little.
not much room for snap ring pliers inside of the slide..
 
I've found that a set of these does help in getting e-clip buggers out:

dVBBOT.jpg


The extended tips allow you to see the holes in the clips much easier. A real PITA when trying to use standard snap ring pliers.
 
Hey I've recently installed stage 3 on my 1980 GS850G. Does anyone know what to do with the tube that goes from the top of the engine to the airbox after installing pods (there is some exhaust coming from it. Should I make it longer so it all gets sucked up into the pods, or can I plug it so I don't have this exhaust perfuming me?)? @almarconi: Do you recommend the inline fuel filter?
 
Do not plug it, you will blow seals!

that is your crankcase vent, it prevents the case from getting pressurized. I just let mine vent to atmosphere.
 
eudemonis said:
Hey I've recently installed stage 3 on my 1980 GS850G. Does anyone know what to do with the tube that goes from the top of the engine to the airbox after installing pods (there is some exhaust coming from it. Should I make it longer so it all gets sucked up into the pods, or can I plug it so I don't have this exhaust perfuming me?)? @almarconi: Do you recommend the inline fuel filter?
Click to expand...

Get a mini crankcase breather filter. You can find them on eBay, or most motorcycle supply sites. 3/8" inlet, washable filter like a K&N, UNI makes them, too, and some other no name companies, but I would make sure you get one that is a cloth, washable type.

You can see mine in the attached photo, right below my intake filters
 

Attachments

  • Capture.jpg
    Capture.jpg
    101.9 KB · Views: 0
You must log in or register to reply here.
Back
Top