• 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.

81 gs 450l questions

  • Thread starter Thread starter 03svrider
  • Start date Start date
0

03svrider

Guest
i have an 81 gs450l i bought with 12071 on the clock. it now has almost 13000. the engine seems to ping a little when i'm getting on it. i put regular in it but filled it with super last night to hopefully solve that issue. when do i need to adjust the valves? i'm thinking soon because of the milage so i'll plan on doing it over the winter but i'm wondering if the pinging could be from needing a valve adj. the engine sounds great when it's running. no valve taps, the thing runs like a top!
also. sorry to ask too many questions. the brake lever almost comes to the bar when i squeeze it initially but if i give it a quick pump before i plan to brake it is pretty solid. old master cylinder or air in the line?
thanks for any input.
 
By all means, do the valve adjustment ASAP. Don’t be lulled into complacency by the fact that the engine is running well, tight valves will cause them to burn, particularly the exhaust valves. Tight valves will not however cause the engine to detonate, or ping. Run the higher grade of fuel and maybe check the ignition timing (not sure it’s adjustable though). Also, check the advance weights as well to see if they are stuck which will cause the timing to be off.

Good luck.
 
in the clymer there is no mention of weights. it says the ignition is electronic so i guess there are no points to adjust. could you elaborate? also, know anything about the brake lever question from the original quote? thanks alot.
 
My 450 runs fine (no ping) on 87 octane and it is all stock, in fact I have tried using premium fuel and didn't notice a differance in performance and my mileage was worse. If you look under the "points cover" there should NOT be points. It should just be electronic, kind of like the underside of a distributor cap "rotor and two tabs". Just make sure those pieces are clean, if not try a little sandpaper or emery cloth to clean them. They sometimes tend to collect moisture in their and corrode a little.

As far as the brakes go you are on track. The only way to be sure would to try flushing first to see if that fixes the issue. Maybe some dirt is restricting the fluid or like you said air in the lines. Then go from there check your pads, cyclinder, caliper etc...
 
kb9lae said:
If you look under the "points cover" there should NOT be points. It should just be electronic, kind of like the underside of a distributor cap "rotor and two tabs". Just make sure those pieces are clean, if not try a little sandpaper or emery cloth to clean them. They sometimes tend to collect moisture in their and corrode a little.
Click to expand...

Yes, electronic ignition but with mechanical advance. The rotor is movable and attaches to two spring loaded weights which move out with rpm. I'm not sure the best way to check them but they must not be stuck.

Brakes pumping up are often the result of air in the system. The brake fluid should be changed about every two years so if you haven't done it lately, now is a good time. Of course, if there is chunkies in the fluid a full teardown is in order. If this does not help you may want to replace the brake line since it may be expanding. Braided stainless lines make the lever much firmer.

Hope this helps.
 
When I play with my jetting and it's lean it will ping.
Are you trying to pull the bike hard at under 3000 rpm? This will also cause pinging.
Are the carbs clean, petcock screen clean, fuel line good, running a inline fuel filter, air filter oiled or stock, vent lines clear, fuel cap vent clear and valves adjusted?
 
thanks everyone. i put super in it and the pinging is almost nonexistant but over the winter i plan on doing fork oil, valve check, etc. so i'll look into the other possibilities then.
 
You must log in or register to reply here.
Back
Top