I found a guy in my neighborhood who is going to sync them but, he said its better to get the jetting size close before you sync them. If i sync them now and then continue to keep changing my jetting it might get out of sync again.

Gas tank will hold 1.25 gallons.

In that vid she was way lean.....she sounds much better now that i went from 1.5 turns to .5 turns on the pilot screws.

nelson8708 wrote:
I found a guy in my neighborhood who is going to sync them but, he said its better to get the jetting size close before you sync them. If i sync them now and then continue to keep changing my jetting it might get out of sync again.
Yes, very true. Everytime you mess with the carbs the sync can get way off. I've had my carbs on and off several times this year. Everytime requires a sync. If you adjust the needles (on a stock bike it can be done without taking the carbs off) the carbs absolutely will need to be synced again. I've synced my carbs probably half a dozen times, at least, this season. I have to do it again since I shimmed the needles again. (many times, only because I'm doing a study with the wideband o2 sensor to get some data for the 550's using TK's.)

You have a lot of jetting/needle/air-screw adjustments ahead of you, so you will probably want to get some sort of synicing tool of your own.

.5 turns out is not all that bad. You really don't want to do the final adjustment on that yet. It's the one setting that will need to be fine adjusted right after a sync. I wouldn't up the pilot till you know for sure the needles have to be set at .5 turns. (That is, after a good sync). Then maybe go larger so you can get in the 1 to 2 turn range. (Stock is like 1-3/8, I think.)



The reason, if your sync is off, your throttle positiin will be off on several carbs. As the throttle opens the mixture should go leaner up to about 1/8 to 1/4 throttle. If yur idle position is not final, then your air-screw setting can't be final.

Where are your needles at?

Lately i've been busy working on my car (sold my ka swap and going to throw a SBF 302 in there and boost it), but i finally put a little time in on the bike. I went and got some more supplies to finish my sync tool and got a few drill bits so i can increase my main jet size. As of now i have a 40 pilot jet, a 106 main jet and stock needles in their stock location (wont be getting needles for a while). Tomorrow i plan to sync the carbs (attempt # 2) and get the stuff needed to make the choke fast idle adjustable (thanks loudhvx). Earlier today when i adjusted the float level as best i could (time consuming as hell and my first timing do it). After that i took out the plugs to take a look at them and seems like #1 was running lean compared to the others and that is the one i had to raise the float level the most. I hope tomorrow goes well and i should be able to get on her a little bit (past 1/8 throttle) fingers crossed for tomorrow

Thanks for the update. Roy

Cool - keep us posted.

SBF ay? Man, you sure do like shoe-horning in crazy-huge motors into little frames.

That S13 is going to be crying in pain! :woohoo:

Hey Nelson I had noticed you are going to use the title for the kz550 to make your bike legal how does that work I would like to do the same.

thompsonmx100 wrote:
Hey Nelson I had noticed you are going to use the title for the kz550 to make your bike legal how does that work I would like to do the same.

Well since i dont have the title for the yz and i do have the title for the kz i'm just going to weld on or stamp the vin to the neck of the bike. Then i'll go register it and get a plate, then ride. If i ever get pulled over its just a custom kz550 with yz125 suspension and plastics on it.

AAAhhh I thought maybe there was some way the motor serial would be used and that would make it legal. Not a bad Idea. I think I;m just gonna take my title to the counter and get a tag. The last time I got pulled over they didn't check my vin.

With the bigger jets and sync'ing the carbs she runs nice...still need to work on my pilot screw setting. Just picked up forza 3 so probably wont be getting much done on either project for a week or so

my gamer tag is nelson8708 if you guy want to get your ass handed to you

videos.streetfire.net/video/YZ550_715911.htm

I like the tank, I have one like it made with a copper pipe. It works ok but I only get a couple miles out of it.

My gamer tag is loudhvx, but I'm almost never on. I haven't even been on Halo almost all summer.

The bike sounds good in the vid!

Went and brought her home from my uncles house today....made a build vid and at the end is me ripping on her a little bit.

www.streetfire.net/video/ykz550-build-vid_1999653.htm

Let me know what you think

-Nelson

Bout time you gave us an update. Have you done a burnout with the knobby yet? Cool video

no burn out yet. Not sure if i want to do some light trail riding before i switch to the street tire. Believe me when i do make the switch the knobby will meet a smokey end

That was awesome! It's so wild seeing what looks like a dirtbike, then it flys by like a 747!!

First time Ive seen this post YOU my freind are MENTAL but I love what Your doing

Really cool video! Hearing that Kaw 4 cylinder sound coming off that dirt bike is soooooo cool. Can't help but smile ear to ear when watching it!

Its up for sale, 800$ for you guys.

-Nelson

Wow, seems pretty cheap considering all the work that went into it. It would be a great toy to play around with. I would think you could get that out of it pretty easily, but I guess time will tell.

You might have already covered this - but can it be titled as the 550? Would be a cool super moto bike if you could get plates for it.

I had planned to title it as a 550. If i ever got pulled over the vin would match (cut it out of the neck before i trashed the frame). Its just a custom 550 with yamaha suspension . I dont see why you wouldn't be able to plate it unless the bmv in your state has to phyically go over the bike.

Price drop 700$

Who needs a low mileage 550 engine? Buy the engine for 700 and it comes with a bike attached to it