Well.....almost made it home. Piece of Yamaha!!! Waited til about a mile from the house and completely crapped out. Started popping and backfiring so bad I thought I was in a firefight, then died when I let off the gas and just coasted into a Lowes parking lot. Tried to restart it but no good. Walked home, got the truck and the tools and went back to see if I couldn't figure something out.

Just for GP I checked the battery voltage; 12.69 volts which is good according to the manual. Tried to start it; at first I didn't think it was going to, then it finally did. Only ran for about 15 seconds, died and exhaled a puff of white smoke out the carb!!! What the ?!?! What's that mean????? Finally got it restarted and it will idle fine. Exhaust sounds a little gurgly though. Kinda like blowing bubbles under water.... Managed to keep it running long enough to ride it home, and thats as far as I've made it.

As for some of the replies;

Bad gas??? Could be.....

Last mods were done over two weeks ago. If it were a pinched vacuum or vent tube you'd think it'd show up right away. Haven't had the tank off since.

Commuting; Always try to take the long way home (about 12 miles) and sometimes go that way to work. So very seldom do I ride straight to and from work.

Last changes only consisted of checking my needle setting and adjusting the PMS. Turned it in about 3/4 of a turn. And again; that was done over two weeks ago.

Did the "paper thing" at the tailpipes after I got it running in the Lowes parking lot. Probably not SVS because it didn't try to suck it in either pipe and if I held the paper tight in both hands, the exhaust is forceful enough it actually tore the paper. (An old receit...)

So...... What do the experts think????? Inquiring minds want to know....

Thanks for any and all input!! I can't say for sure, but I think the puff of white smoke out of the carb may be key in figuring this out.

In The Wind,
Aaron

Oh yeah; no fuel pump so that can't be the problem. Pulled the fuel line and I'm definitely getting gas....