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Getting er started again

  • Thread starter Thread starter shoeless_000
  • Start date Start date
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shoeless_000

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So over the past four months I have given my 77 gs550 a makeover from hell. She started out looking like Mr. Cleaver's moped and now she's a mean, bare essentials, skulled out grunge cafe racer. Some of my mods are:

Junked the stock airbox and filter

Fabricated a custom intake with 6.5" K&N cone filter

Grinded as much of the useless crap off the frame as possible

Said to hell with the mufflers, straight headers, wrapped of course

Switched to a AGM gel battery which was then relocated under the rear cowl/hump

Had my old lady sew me a custom seat

And finally, stepped up the jets three to four sizes (I have both to play with)

What I need help with is any advice whatsoever that would help me in getting her back into peak running condition. I haven't tried starting yet, as I'm waiting on my pilot jets. I'm somewhat new to bikes especially older ones, so I would hate to make my job of getting her running harder than it has to be. Thanks in advance for any ideas.
 
Are you getting stock size pilots or upsizing? Chances are you can prolly dial it in from what ive been told with the stock pilots, but you'll need to up the main size...could be tough to judge with that fabbed filter. Definately will need to rejet with open pipes and freer flowing air filter tho. Otherwise you'll run lean and that leads to bad things.
 
Running open exhaust with a custom intake I think is gonna be hard to dial in. Maybe try get a cheap wideband sensor when you're gonna dial everything in. It'll save you from running lean and blowing a hole in your piston and it should also be alot cheaper than spending some time on a dyno
 
Ok Riot showing some ignorance here as im no mechanic, but wtf is a wideband sensor and what does it do, and do i want one?? LMAO
 
YES YOU WANT ONE!!!!! Lol actually a wideband sensor is basically just an oxygen sensor and an LCD screen. The O2 sensor reads your exhaust gases and shows if you're running rich or lean by sending a voltage signal to the reader. It helps immensely when try to read whats going on with a set of carbs. Now you can get a really fancy one that'll have a full display and what not or you can get a simple one that reads the voltage that the O2 sensor sends out and go from there. Either way its as simple as duct taping the O2 sensor to the end of the pipes and adjust accordingly
 
Lol if you REALLY want cheap what you can do is steal an O2 sensor off of your car and then measure the voltage with a multimeter. Same thing and you can get it done the same as an expensive model for ALOT LESS money.... But a cheap one can range anywhere from 100 something to 200. Mostly because the O2 sensors themselves ain't cheap
 
Ahhh.. that sounds complex...lol Im seriously considering bringing my bike in the house...LMAO seriously tho.
 
yeah but how do you know if its rich or lean?? Is there a scale based on voltage?? I have a multimeter already, so that part is done at least...lol
 
Yeah there is. O2 sensors send a voltage from like .1 to .9 I think and from there you'll know how lean or rich. I'll try and see if I can find a table
 
AHHH that totally makes sense! Thats a hell of an idea?? I wonder how much a cheappy O2 sensor is at like autozone or something. Thats a hell of a neat lil tool! Do you just stick the o2 sensor in the end of your pipe and tape it on?
 
Oh man it has to get up to 600 degrees! i dont think your exhaust at the end is that hot, youd have to stick it WAY up in there.
 
Hehe the problem with buying an O2 sensor is that you'll be hardpressed to find a crappy one. The only ones they sell at AutoZone are the Bosch brand. The cheapest ones are the ones that are used by ford. Its about 50 bucks. And pretty much all Ford trucks use the same ones so just go in there and get one for like a '04 Ford F150. The only difference between the ones listed for Ford are the length.

And yeah you just stick it in the pipe, tape it on and then read the sensor's voltage and tune accordingly.

Although its pretty easy to do at Idle, it become difficult with other thing like WOT. But maybe just putting the bike on the center stand and running it through the gears can solve that problem. The important thing is running it through the gears. You never want to just rev the sh!t out of an engine. Engine's need a load or else you can spit a rod
 
TheCafeKid said:
Oh man it has to get up to 600 degrees! i dont think your exhaust at the end is that hot, youd have to stick it WAY up in there.
Click to expand...

Hehe yeah I think it can get that hot. Besides this guy is gonna run just headers. Those'll get hot enough. As for the rest of us I'm pretty sure it can get that hot
 
Well i can pull my meg off and stick it right in the collector from the headers, Im SURE it gets that hot there.
 
Yup you can do that too. And the rich or leanness won't be affected because all automobiles have the O2 sensors before the mufflers and they can be removed without effecting the rich or leanness
 
you'd prolly get a more accurate reading doing it that way as well, seeing as there is less ambient air at the header than the meg. i might have to pick up an O2 sensor this week. Couple that method with a colourtune plug and you could have that baby purring like a kitten with EXACTNESS. You say it creates its own voltage so you dont have to power it at all?
 
YUP. The tip heating up is what generates the voltage. So it needing to be at 600 degrees before working correctly is explained.

And if you're feeling cheap steal one off of your car! Lol. Just don't strip the wires!!!!! I've seen it done so its a word from the wise!

Whats a colortune plug? I'm assuming a sparky (spark plug) that read the the hotness of the cylinder better?
 
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