1/4 throttle stumble

[Guest]

Yes you'll need to richen things up again with more air flow.

[Kapoor]

Wellthat'd be alright. So now I got a weird problem. My idle is either stuck between a low (probably 700ish, I'm not sure because my tach has never worked but based on what my car sounds like) or it takes off and sticks at probably 2k or a little higher. I'm planning on taking my throttle cable off and lubing up see if that helps, but honestly it doesn't feel sticky. I guess I was wondering if the new pilot jet could be the cause for the poor idle since it would idle just fine before the change?

[Guest]

Did you make sure you put all the rubber caps on over the pilot jets?

[Kapoor]

Did you make sure you put all the rubber caps on over the pilot jets?

Yeah I did, but once it cools down I can check again. Since I changed my pilot and main jets should I take into consideration the other jets? I'm going to buy another set of plugs and do some chops here in the next few days, and I'll report the reults here. thanks again for the input. Always is helpful

[Road_Clam]

Yeah I did, but once it cools down I can check again. Since I changed my pilot and main jets should I take into consideration the other jets? I'm going to buy another set of plugs and do some chops here in the next few days, and I'll report the reults here. thanks again for the input. Always is helpful

Can't say I hear too many situations where people have to richen the main circut on a completely stock GS. I'm pretty sure the reason most all bikes come so lean from the factory is to comply with the EPA emissions test method of that peticular era :

Quote:
"The Federal Test Procedure, or FTP, is a specific protocol "designed to measure a vehicle's tailpipe emissions under urban driving conditions," according to EPA regulations. The test is run on a piece of equipment called a chassis dynamometer, as opposed to a track or streets, and it involves a series of accelerations, decelerations, idling, cold starts and hot starts designed to simulate urban motorcycling. It covers a distance of 11 miles. The average speed is 21 mph. The average ambient temperature: 75 degrees. "

So if you absorb this test procedure and you understand the relation to the carb circut you will realize the pilot jet mostly controls the EPA emissions outcome. Hence why the factories jet so lean stock. In the deep south i'm sure a stock pilot jet will be suitable, however up here is the northern states when it drops into the 40's and 50's for ambient temps, the bikes low speed drivability suffers substantially