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Mr Keith Krause Please help!!

  • Thread starter Thread starter TheCafeKid
  • Start date Start date
TheCafeKid said:
Hey Keith...take a look at this...it seems this model doesnt have the parts we're talking about..or am i just looking at it wrong??
http://www.babbittsonline.com/pages/parts/viewbybrand/1/Suzuki.aspx

Also yes my main is not a 511 its 115 my bad...lol
Click to expand...
OK then. Looks like the "B" carbs have an inferior design but at least you're off the hook. As long as you're sure you have the B model.
As for the jetting...
It appears your jet needles are at the 2nd position from the factory?? That's what the parts list said at that link you provided. The "-2" after the jet needle number means that the e-clip is at position 2 from the top, straight from the factory.
If so, then you have 3 richer positions to use (needle should have 5 positions). That should be enough for your mods. I would try 2 positions richer (position 4 from the top) and test at 1/3 throttle. You did say the e-clip is at position 3 right now and of course you can always test at that position if you like. I REALLY doubt that just 1 position richer will be enough but it's up to you. I'd go to position 4 though.
I like to try to make the stock 15 pilot jet work along with richer fuel screw settings but since you already have 17.5, that's fine. Good chance the stock ones wouldn't work anyway and the 17.5's are always the next choice. Just as a guess, I'd initially set the pilot fuel screws underneath 1 full turn out with those 17.5's and test. Test at minimal throttle for the pilot circuit. I like to cruise steady about 35/40 in 4th gear for a couple miles level/uphill road and chop off and read the plugs. Be SURE the bike is fully warmed up for any testing.
As for the mains, a 115 isn't enough if your pipe and pods are flowing as they should. Something closer to 125/130 is commonly used. If your want an opinion as to what specific size, I'd probably try 127.5. No way to know for sure of course but that's where I'd start and hope it's right. Test the mains at full throttle.
As for the side air screws, I generally set them about 1 3/4 turns out initially. Once the bike is warmed up fully, I set them using the highest rpm method. Then the vacuum synch is done.
Backing up a bit, be sure to set those float levels and remove the 2 floatbowl vent lines. Be sure all electrical connections are solid/clean and you have a good blue spark. Remember to inspect the manifolds and replace the manifold o-rings too. Since you already set the valve clearances and set the ignition timing correctly, you should then be ready to test. I am wondering about the bit of white exhaust you mentioned though. If it is burning oil, that will effect performance and plug reads, depending on how much it's burning and if it still burns oil once fully warmed up. Leaky valve stem seals and rings are the most common reasons. If it just burns a little when still cold, you're probably OK for now, but it will get worse over time.
Once you get it running well, you might even want to experiment a little with the advance timing. You might find that 5 more degrees or so of advance makes the bike perform better. As long as you don't set the advance too much and promote pinging. It depends on how your jetting ends up too. If you think you're just a tad on the rich side but don't want to go with a smaller jet/adjustment, then a little more advance will help that slightly rich condition and make the bike perform better. Some tuners even go with advanced timing from the start and jet accordingly. Up to you.
 
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Another thought...some parts shops carry a selection of Mikuni mains and they MAY allow you to swap/return them for the next size if you don't nick them up in any way when you install them.
You might also find that members here have jets lying around that they don't need anymore or will sell cheap. Just be sure of what you're getting if you go with used.
 
Hey Keith i wanted to thank you again for all of your help thus far..its gettin close...im going to order bigger mains and i found a intake leak in number one, so orings too..you say 127.5? or should i try 125s first?
 
Just saw this as I'm off to bed.
As always, it's very hard to try to guess jetting the first time and be done. From my past experience, a 125 or 127.5 is my best guess. I would probably go with the 127.5's if the pipe and pods flow as well as they should. I hope the jet needles in position 4 work well.
I also posted at your other thread if interested.
Gotta hit the hay. Big day of polishing up the bike for the big annual run this Sunday. I always take off the Friday before to get it done.
 
Enjoy sir!! And thanks much...i owe ya one or 20 should we ever meet up!

Josh
 
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