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What r these pics telling me?

mvalenti

mvalenti

Forum Mentor
The other day my bike started acting up. Popping and backfiring. Thought i would check header bolts, one was loose and tried to tightn when woosh it stripped... helicoil later and Found out it was bad exhaust gaskets. So got those on order, sand blasted the headers and painted. Took a peek and one was heavily carbon deposited... Others were whitish... Let me know what u think of the pix.
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Agemax said:
guess so. gotta say as well, some of those exhaust bolt threads look a bit damaged to. you may want to look at helicoiling them as well.
Click to expand...

Good catch will do

Anyone in my neck of the woods northeast mass, that has a colortune????
 
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Check the compression on the white valves cylinders. I hope you didn't burn a valve.
Also how is your valve clearance?
 
mvalenti said:
Good catch will do

Anyone in my neck of the woods northeast mass, that has a colortune????
Click to expand...

If you don't mind taking a ride to providence RI I know a great guy who owned a suzuki dealership back in the day who can take care of it for you.
 
Not sure what the pictures are telling me, but looking at the title of the thread tells me that the "A" and "E" keys on your keyboard are not always working.

.
 
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Pulled plugs, set closest is a recent install, 3 weeks ago... Left to right 1234... Looks similar to the valves.. Cept more tanish... Guess why i was t alarmed at first.... My fuel pilots were between 1.5 and 2 turns out... Maybe i need to go up a size??
 
#1 carb has a problem that has nothing to do with the pilot adjustment. She's over fueled for some reason. Leaking internally, too high of a float level, something...
 
mvalenti said:
Guess why i was t alarmed at first.... My fuel pilots were between 1.5 and 2 turns out... Maybe i need to go up a size??
Click to expand...
Before you go changing your jets, where were your air pilot screws set?
Generally speaking, they should be about double the fuel screw setting, so if they were less than three turns out, you will definitely be running rich on them.

What mods to the bike? Pods? Pipe? Cams? All of these will change demand on pilot settings.

.
 
mvalenti said:
My fuel pilots were between 1.5 and 2 turns out... Maybe i need to go up a size??[/QUOTE]

So, clarify this situation

Your bike was running fine, then something happened?

You find #1 is super rich and the rest are lean?

You have VM carbs?

1.5 to 2 is way too much for the fuel screw, should be 1 or less
Click to expand...
 
talk me off the ledge...

talk me off the ledge...

Update...

So I tore into the carbs over the weekend. cleaned and used compressed air to blow them out... inspected all parts, ... I didnt find anything alarming... I decided to put everything back to stock. this included the mains, mine were up a few sizes. So needle position on #3, 105 mains, fuel screw 1/2 turn out, air screw 1 turn out, new exhaust gaskets, checked carb rubbers for leaks.. I turned to my "custom" intake system, and put a restriction on it. bike fired right up, didnt sound buzzy anymore, sounded more mellow, kinda throaty.. a little idle adjustment and she was running good. went down the street and immediately it felt like it had more torque at lower rpm. it was a 5-10 minute ride, i decided to do a 3rd gear plug chop 1/3 throttle as i pulled into the driveway. plugs looked tan, lighter than i would prefer but darker than before I didnt make any adjustments to the circuit yet. I did a quick compression check... between 120 and 95!!! :( walked away...fired the bike up last night, #3 cyl is cold... :( great spark, and gas, 90 psi (cold eng and a little oil) I pulled the cover off and measured the shims, one was in spec (#1 the sooty black one of course) all others were 0.038mm and one was tighter than that.. I'm thinking on pulling the top end off tonight and inspect.... thoughts? prayers? Kinda sad.... I need my blankie...
 
rustybronco said:
Shoot us some wet and dry compression numbers.

What was the final result from this thread?
http://thegsresources.com/_forum/showthread.php?p=1844269#post1844269
Click to expand...

sadly I never finished... truthfully, i forgot about it... will try tonight, may be better that the valve cover is off and I can see that the valves are closed. never have done this, should I perform this with piston in tdc?

wet and dry, will do tonight, although it will be with a cold engine. I could warm it with a 100,000 BTU kerosene heater..... thoughts? (fuel tank removed for safety....)
 
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No need to warm the engine up; cold is fine and yes, piston at tdc.
 
Cold and dry
1. 2. 3. 4.
95. 85. 70. 95

Cold wet (tbsp oil)
1. 2. 3. 4.
105. 120. 120. 130

Carbs are off, as is valve cover...
 
Valve lash have been adjusted; correct?

Leak down test indicates? (hint-hint)

By the compression numbers and taking into account the mileage, the engine looks tired... BUT it ran well in the recent future correct?
 
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