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General GS500 Discussion / Re: BSR34 OEM needle valve assembly
« Last post by ShowBizWolf on Today at 05:39:39 AM »


P.S. - Does anyone else have an issue deciphering the “verification letters in the box” that you must type every time you post? And what exactly is the correct answer to “what causes the electrical arc to occur that causes the explosion in the cylinder”? I’ve tried to answer with spark plug, sparking plug, and coil, but my answer always get rejected.  :icon_sad:

Welcome to the forum! Cool to see another person from PA :thumb:

After your 5th post, all the verification stuff goes away. Also, if I remember right, try "sparkplug" all one word like that. I think I recall someone asking about that before.
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General GS500 Discussion / Re: RPMs very high - 6k with choke on
« Last post by mr72 on Today at 01:31:16 AM »
i think maybe some service technicians played with this idle mixture screw when the previous owner let the carbs get gummed up so that it wouldnt die from it being gummed up or so it starts easier.

Yeah, that's one of the causes of incorrect idle settings I point out on my infamous blog posts. I think that's exactly what happens, either owners or lazy mechanics do this. Also the pilot jet may be too small in which case it just makes matters worse. It's a tiny jet and easily clogged anyway, and if it's too small to begin with then the bike will not tolerate any clogging before it stops idling correctly.
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General GS500 Discussion / Re: RPMs very high - 6k with choke on
« Last post by BikerBoy on Today at 01:23:43 AM »
Idle speed is set too high. Redo idle mixture adjustment with it fully warmed up.
thanks for that. i think maybe some service technicians played with this idle mixture screw when the previous owner let the carbs get gummed up so that it wouldnt die from it being gummed up or so it starts easier.
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General GS500 Discussion / Re: RPMs very high - 6k with choke on
« Last post by mr72 on November 15, 2018, 11:37:59 PM »
Idle speed is set too high. Redo idle mixture adjustment with it fully warmed up. 
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General GS500 Discussion / RPMs very high - 6k with choke on
« Last post by BikerBoy on November 15, 2018, 11:13:48 PM »
hey so when I start my bike choke on it will be at 4-5k. then while warming up it will jump to 6k after about a minute and stay there. I did a carb clean, not rebuild or sync just to get the bike running again, and it runs now but idles high.

Im curious what the order of operations should be to fix this. yes I could do the whole rebuild but I just want it to run right without taking it all apart again. Should I buy a manometer and do a carb sync, then adjust the idle screw to see if that fixes it? thanks
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Hi everyone,
Still got a couple boxes of parts, plus some bulky stuff. Would love for someone to take it off my hands. Cut prices on page 1, and if you showed up in person in Minneapolis I'd shower you with relative treasures for a pittance. Have some new pics of my remaining stuff, I'll try to get it uploaded to the linked photo drop soon.

Thanks,
Mark
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General GS500 Discussion / Re: Idle problems
« Last post by jevhid on November 15, 2018, 07:02:40 PM »
Unlikely to be compression or valves

I only mention it because at one point I did a carb clean and valve shim change, and afterwards my idle was horrendous. I thought I'd messed up the carb but I couldn't fix it by fiddling with the carb. It ended up being the new exhaust valve shims being wrong (no gap, always tight) which would have held them open at least a little all the time. I fixed the shim problem and immediately my idle improved.

No, I'm totally sure about valve clearance because I double checked it. I will try to follow the suggestions posted above and fix it.
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General GS500 Discussion / Re: Idle problems
« Last post by mr72 on November 15, 2018, 01:33:17 PM »
Well, was riding my bike for all this time, still randomly happens. I found a video with the same problem: https://www.youtube.com/watch?v=HsxBpwPuQRc

Can anyone point out a possible cause to it? It's about time to put my bike in a storage, so I will have a lot of time during winter to play with my carbs.

If I had to guess, I'd say your "idle speed screw" is set too high, and you have one or more vacuum leaks and/or clogged passages in the carbs.

Sounds like you've tried to make it idle on the main jet and periodically vacuum falls low enough to let the slide drop and it does this.

Just guessing. The fix is the same either way. Rule the carbs out entirely by doing the job right. Make absolutely sure you don't spray carb cleaner on the assembled carbs and do not trust the idle mixture settings until you have adjusted it with the bike completely warmed up after like 20 minutes of riding it on the road.

Could also be an intermittent ignition coil failure, but carbs are much more likely so start there IMHO.
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General GS500 Discussion / Re: BSR34 OEM needle valve assembly
« Last post by TGTwin on November 14, 2018, 11:44:54 PM »
When I rebuilt my carb I just bought a generic kit of Nitrile o-rings in a bunch of different sizes, then just compared the old ones to whatever was in the kit to find one that would fit. Seems to have worked for me. (was only a cheap kit, this one:
https://www.ebay.com.au/itm/O-RING-Washer-Sealing-FKM-VMQ-NBR-RUBBER-ASSORTMENT-KIT-for-the-connectors/291867089802?hash=item43f4a25b8a:m:mFVe-VSwg6l3-nFcyA5QltQ:rk:6:pf:0
it may fail in time, but I haven't seen any degradation yet).
The only rings I had to buy separately were for the pilot screw as the damn things are tiny.
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General GS500 Discussion / Re: Idle problems
« Last post by TGTwin on November 14, 2018, 11:40:34 PM »
Unlikely to be compression or valves

I only mention it because at one point I did a carb clean and valve shim change, and afterwards my idle was horrendous. I thought I'd messed up the carb but I couldn't fix it by fiddling with the carb. It ended up being the new exhaust valve shims being wrong (no gap, always tight) which would have held them open at least a little all the time. I fixed the shim problem and immediately my idle improved.

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