NEED HELP ASAP!!!!

W

workaholic

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I bought a set of PSI twin pipes for my 1989 Yamaha Exciter. In the instructions it sais to use the Custom PSI 4th pos. needle. Or you can use the update needle that Yamaha released in 1989. The stock needle is 6DH7-4, in my machine i have 6FL82. I need to know what was the updated needle's part number. I know my needle is too small (its at the first notch {leanest} and it is still running rich. So, i need to buy the Custom PSI needle, or the yamaha update needle. Can someone help me out or is there a different needle that will work
 
pipe/needle

Ok, I am going to offer the best help I can, and the same i would offer to a close friend. Do not install the pipe, and dont worry about the jetting. Set it at stock and keep your carbs clean. This sled does not have a great reputation for staying together as is, and the pipes are quirky at best. Many of my riding friends went down the psi pipe road, and the next road was the piston road. I am sorry to be negative, but I think it is only fair. They did not get the nickname EXPLODER for no reason. Some will tell you problems were only 87 or 88, but my 91 went down aswell.

Godd luck, and if someone would like to argue I will add the disclaimer IMO.

FYI - I am not against pipes, and run them on my current sled.
 
if its running rich what are you worried about? i dont think that the float bowl is going to run out of gas... if your worried about that go to the dealer and get new ones, its a good idea anyway :idea: hmmmm how about go up one or two main jet sizes then install dial a jets thats what i did....put brand new plugs in (no color) then ride it warm it up.... then give it full throttle for about 15 secs then hit kill switch imediatly pull over pop hood and check plugs full throttle is the only way to see if the plugs are right color also get a temp guage for your pipes to fine tune with the dial a jets, seems like alot, but in the end it will be worth it :D but remember this should be done on a fresh engine after its broken in .... the main reason for exciters being called exploders is because the owner didnt know what they are doing.. there is a break in period of about 3 hundred miles were you use extra oil in the gas tank for first three tanks and take it easy and just ride dont beat on it ,theres plent of time to beat on it when its broken in.... i can ride full throttle all day long but i also think one problem with the exciters is not enough cooling for the mods so i built a little radiator for mine check out the pic
Richie
 
thx for the tips. There is only one thing though, it is getting too much gas. it floods easy and fouls plugs. it runs on one cylinder at the start because its too rich and too much gas. I need bigger needles i think. any needle ideas?
 
exciter

Work -

Let me tell you the blow up factor has little to do wit the break in procedure. I have owned Yamahas since 78, and only one blew up.-exciter. I enjoyed the sled and you will to, but dont pipe it. As for checking the plugs--- You can NOT check brand new plugs. You need a good 15-20 miles on then to coat up then test it UNDER LOAD. If you think I am blowing smoke ask your local tech.

I suppose It could be an insult that "we dont know what we are doing", but after all i raced sno x and have a lot more background with these motors than ... The exciters typical issue was piston "slop" the ring would catch the port and night night. Mine blew up at about 30 mph in very narrow trails.

I understand that you dont want to hear negative issues, and I respect that, but it would be a crime for an owner of 14 yamahas not to share EXPERIENCE.

Enjoy it, but pipe it and lose it.
 
I also have owned three different exciters in the past. Have run twin pipes on all of them. These sleds had about 35,000 miles combined. I have run exhaust gauges on all of them, same results. The pipes do create extra heat at mid to three quarter throttle. If you do not want to spend the money on gauges I probably would not recomend the pipes. It is simply not possible to leave the throttle setting at this for extended amounts of time. Full throttle is not a problem if jetted correctly. Your flooding issue is either a stuck float or incorrect float height adjustment. I found that Yamahas recommended float height was about 1-2 mm to high for me. Good Luck
 
If you want your sled to last awhile and have a reliable sled leave the pipes off. Unless you like playing with your jetting all the time and shortening your engine life. If you want a better sounding sled with less headaches just put a can on it.
 
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