any ideas??

Message

telefunkin · Fri May 18, 2007 1:55 pm

When I start my bike cold, it idles extremely low, to the point where I have to keep the throttle open or it will stall out. This is regardless of what position the choke is in and no matter how much gas I give it, it will not rev up past 1000rpms. After playing around a bit, I figured that if I start it, close the choke and hold the throttle wide open for about 10 seconds, it'll start to rev up, backfire and then everything runs fine until the next time I cold start.

If anyone has any ideas I'd love to hear them. It's an 1983 Yamaha XS400 Maxim. All stock.

James

Sicko · #2 Unread post by **Sicko** » Fri May 18, 2007 2:36 pm

Fubared carb linkage is the first thing that came to mind.

#3 Unread post by **Sev** » Fri May 18, 2007 2:40 pm

What... is a carb linkage?

Sicko · #4 Unread post by **Sicko** » Fri May 18, 2007 3:53 pm

Carburetor linkage.

#5 Unread post by **Sev** » Fri May 18, 2007 4:07 pm

Clear as mud, thanks.

As for the actual problem, sounds like clogged jets in the carbs, and possibly a dirty airfilter. I'd clean the former, and replace the latter.

Adjust the idle speed, then sync the carbs. Or get a mechanic to do it

telefunkin · Sat May 19, 2007 6:39 am

Thanks for the tips, I already replaced the air filter so looks like the next step will be cleaning the jets.

telefunkin · Sat May 19, 2007 1:59 pm

Okay, it's definately the carb. I gave it a few shots of carb cleaner and the problem disapeared. Hopefully that'll take care of the problem until next weekend when I can get some help taking the carb off and cleaning it. I never cleaned one before so I wanna make sure I have someone here that knows what they're doing.

Thanks again for the tips.

James