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Message started by lonerider65 on 07/20/11 at 13:14:18

Title: Black smoke.
Post by lonerider65 on 07/20/11 at 13:14:18

My bobber project is going awesome. My bike had a bad exhaust leak when I got it and ran like crap. I have done the verslavy conversion and adjusted the valves ( although the top end still has some ticking) the thing pounds the ground like a big twin V ( doesnt sound stock by no means). The carb has been jetted and has a smaller nylon washer. I made the exhaust out of a old sportster drag pipe. Now the prob is when idling it puffs blacksmoke. It doesnt backfire and has plenty of power. It blows some when the throttle is twisted but thats to be expected. Turning the air fuel screw doesnt seem to have any effect. Its so rich that it will foul the plug after a while, but it doesnt backfire. What gives?

Title: Re: Black smoke.
Post by EJID on 07/20/11 at 13:19:29

I'd say start with the jetting.

What jets are in there?

Is there a washer under the main jet?

Title: Re: Black smoke.
Post by lonerider65 on 07/20/11 at 13:25:36

There is a smaller nylon washer on the needle. No washer under the pilot. Also I forgot to say that it has an open air breather (cone). Im not sure of the jet size, I couldnt make out the numbers. I compared the jet to a 180 jet that I had and it was smaller.

Title: Re: Black smoke.
Post by lonerider65 on 07/20/11 at 13:38:40

http://p1.bikepics.com/2011/07/20/bikepics-2243419-full.jpg

Title: Re: Black smoke.
Post by CalisOsin on 07/20/11 at 13:40:10

is that alligator skin on your seat?! Nice!

Title: Re: Black smoke.
Post by lonerider65 on 07/20/11 at 13:45:27

Yea, looks purty cool I thought. Paint and hide the wires in the bars is all thats left. Then ride untill the rigid rearend beats my kidneys into my throat!

Title: Re: Black smoke.
Post by MrBrownTX on 07/20/11 at 14:11:20

That's gorgeous!

Title: Re: Black smoke.
Post by Serowbot on 07/20/11 at 14:12:26

Black smoke is definitely rich...

Check this...
How to check your petcock,... (http://suzukisavage.com/cgi-bin/YaBB.pl?num=1251932429/1)

Title: Re: Black smoke.
Post by lonerider65 on 07/20/11 at 14:17:20

Thanks for the info, I spotted right away that the vaccum from my petcock goes to the left side of my carb. Now that I know that it is all crossed up, do you guys know of vacuum routing diagram?

Title: Re: Black smoke.
Post by verslagen1 on 07/20/11 at 14:27:53

4F4C4D46514A4746511516230 wrote:

Turning the air fuel screw doesnt seem to have any effect. Its so rich that it will foul the plug after a while, but it doesnt backfire. What gives?

backfire (technically, to be correct, afterfire) is caused by being overly lean.
what happens is the engine misses, the gas vapors collect in the exhaust, when enough oxygen is drawn in, a spark from a non miss lights it and bang.

so being incredably rich, there's no miss fire, no oxygen, no bang... no joy.

Title: Re: Black smoke.
Post by verslagen1 on 07/20/11 at 14:29:24

7774757E69727F7E692D2E1B0 wrote:

Thanks for the info, I spotted right away that the vaccum from my petcock goes to the left side of my carb. Now that I know that it is all crossed up, do you guys know of vacuum routing diagram?

check the link below, look for carb, stock, spec's.

Title: Re: Black smoke.
Post by lonerider65 on 07/20/11 at 14:32:44

Ok Thanks