GS450 runs fine on stand, unresponsive under load

[Guest]

I've finally got my 450 to where I can ride it, and it's not acting quite right. With the bike on the center stand, I can shift through all the gears and the throttle response is okay. It's slow to rev back down sometimes, so I need to lube the cable and clean the slides. However, when the rear wheel is on the ground it doesn't feel right. I've got to rev to ~3k when taking off in 1st, and the throttle doesn't really do anything. I didn't drive it far enough to see if it was simply delayed, only up and down my driveway. I've got a Mac 2-1 exhaust, what look to be imitation EMGO pods, and a 137.5/40 jet setup. How should I proceed? TIA.

[JRHemmen]

I should also note that I've done the coil relay mod, and have new plugs and boots. I have a strong spark, and the petcock was rebuilt as well. It's still occasionally backfiring, and smoke slowly comes from the carbs after I shut it off. This would normally lead me to believe that it's lean, but my jetting is on the large side, I can't imagine that that's the case.

[Gorminrider]

here first, with pods

http://www.thegsresources.com/_forum/showthread.php?199275-Pods-Pipes-Panic!-%28Help!-Your-Bike-has-Pods%29

[JamesWhut?]

Are the valve clearances within spec? Compression? Have you checked for intake leaks?

[ukjules]

Your issue sounds similar to my issue on a thread running near yours !
Mine too only has an issue under load , not on the stand !

the guys have given various options that may help you too ?

Jules.

[JRHemmen]

Are the valve clearances within spec? Compression? Have you checked for intake leaks?

Valve shims are all just replaced, new carb boots and boot o rings. Valves have been lapped and had seals replaced. I find it hard to believe that there could be an intake leak.

[JRHemmen]

Not quite sure what happened, but it runs totally fine now. I took it on a two mile loop around my neighborhood and it was great. I'm amazed how easy it is to ride, I've never even been on a motorcycle before.

[cowboyup3371]

Please get yourself into a Motorcycle Safety Foundation (MSF) Basic Rider course ASAP

[JRHemmen]

Please get yourself into a Motorcycle Safety Foundation (MSF) Basic Rider course ASAP

Oh no worries, I already have a date set for the class. I just wanted to get a bit of experience before I went into the class so I had some idea of what I'm doing. My neighborhood is completely devoid of traffic as well.

[sam000lee]

Any guesses on what changed?

[JRHemmen]

I'm not sure. Either it wasn't warmed up fully last time, or it's just bogged down on the low end. I'm also under the impression that i still need to adjust the clutch, because the revs rise quite a bit when I pull the clutch lever in.

[JRHemmen]

I replaced the PO's Moxi filters with K&N's and felt an incredible difference. However, it still seems to surge a bit, and the engine still sounds a little off to me, I'll record a video later. I'm currently running 137.5/40 jets, should I step up to 145/45? I was recommended that on another thread. I have the Mac 2-1 exhaust and K&N pods.