| Author | Message | ||
     Manofdesign |
I have a 2000 M2 and everything was find last spring and summer. It had to mothball it over the winter and when I took it out, put in new gas and had a leaky rocker box and it is doing this sputtering. I put in some injector/carb cleaner and it does not appear to be working. Now this morning I start up the bike (it was really cold out) and let it idle on choke. I went in to put on my gear and came out. Yikes. The rear header was starting to glow near the head. I pushed in the choke and let the RPMs go down to normal and it cleared up. So two questions. Any ideas what could be causing the "Pppfffftttttt" sounds and simaltanous loss of power at low RPM with very light throttle? It only does it a couple times then recovers. Secondly. What could be causing the red header? Lean condition or something else? I am guessing the red header and "Ppppffftttt" are related. Besides that I finished repairing a leaky rocker box...and need to tackle the rear one. Anything I should look for while its apart? Thanks!!! | ||
| Bluzm2 |
Couple of things. The red hot header is due to a rich condition. The enricher (choke) will do that. The Pfffft sounds like the classic "Kehin Cough". Has your carb been rejetted? You should have a 45 pilot with the screw out about 2.5 turns. This will help BIG time. Since you have the carb off, you should also do the intake seals. Very cheap insurance. Parts will run about $10 for the intake and spigot seals. You will need to get a bent allen wrench for the intake clamp bolts. Al at American Sport Bike has them. Well worth the price even if you only use it once. Actually, he as all the parts you need. Pretty easy job really that makes a huge difference. Brad | ||
| Manofdesign |
Thanks Brad for the help. The bike has a Screaming eagle intake filter that included different jets. This was installed by the previous owner and he said he installed the larger jets. It ran find all last season. How do you tell what size pilot it has? Hell. Where is the pilot located? I guess I can bust out the manual and find it. Thanks again. Jason | ||
| Buellzebub |
disclaimer: it's been a few years since i've done this procedure the pilot adjuster may be hiding underneath an alloy plug... e.p.a. thing. it is in a tubular protuberance that is angled in towards the throat of the carb. if you can see a flat surface at the end the low speed adjuster hasn't been freed yet. carefully drill a tiny hole thru the aluminum blanking plate (just barely thru, it's about 3/32" thick) and screw in a self tapping screw. grab the head of the screw with a vice grip and lever the plug out, the pilot adjuster lives underneath. adjusting the pilot should help the low speed circuit. (Message edited by Buellzebub on March 16, 2007) | ||
| Justin_case |
Thats the idle mixture screw. You must remove the bowl to access the pilot jet. | ||
| Bookyoh |
Just a few thoughts: 1. If the bike was running fine before putting it away then there should be no reason to change the pilot jet. If you had old gas in the carb all winter it could have started to varnish and plug things up though. 2. Was it running bad before you fixed the rocker cover leak? 3. Consider changing the plugs and make sure the wires are seated at the plugs and at the coil. Mark |
