Stock Airbox sealing

[dirtthrasher]

I have a bone stock 2005 Vmax. Has an annoying stumble in the 2500 rpm range, and may be associated with a quiet backfire from the left exhaust pipe. More like a burp actually. After that, on up in rpm its fine, seems to be worse under hotter/more humid conditions. I suspect the airbox is a part of the problem. It is so hard to seat that airbox and keep it fastened to the tops of the carbs. And when its loose, or the air filter out of there, it will run far worse. Any experience with airbox securing, better design? maybe better air filters to try? seperate issues I know. thanks.

 

[44boyd]

search for "Shotgun" and "Peashooter" procedures, more than likely carb related. Might want to run some seafoam in your next tank. Hopefully you get it before you have to tear them down.

 

[dannymax]

As for airbox sealing, make sure the coolant lines and wiring harness aren't keeping the airbox from sitting squarely on the carb throats.

 

[jfeagins]

Stumbles under the 2500rpm range, especially if the fan is running under hot conditions is sometimes caused by low voltage. Might check that your charging voltages are up to par so that the TCI box don't act up after the fan kicks on.

 

[MaxMidnight]

Getting the air-box to seat is not normally an issue.

Make sure that the rubbers are in good condition and not kinked or torn.

Make sure that the clamps are sufficiently backed off.

Apply a light smear of silicon lube to the inside of the rubbers.

I usually fit and secure to the air-box first, ensuring that the rebate in the clip is in the corresponding 'bump' on the rubber.

Place the air-box over the carbs and push down on one corner - you should feel the rubber go into the groove around the top of the carb.

Work round in a circle pushing onto the next carb until you feel the rubber jump in, then the next and the next.

The rubbers should now be seated full onto the carbs with the ridge on the inside of the rubber fitted snugly onto the grooves around the top of the carbs.

Tighten the clamps and they should stay in place

 

[dirtthrasher]

My bike originally was running pretty crappy in the lower rpm range. I reseated the airbox, that was it. And it ran a ton better! I couldnt believe the difference. the only issues was the low rpm hickup mentioned above, which in fact could be an entirely different issue.
But it was then I realized there were no barbed fittings on the carb air boots to grab ahold of the rubber boots on the air box. The air box can too easily in my mind, come loose. I bet I could easily pull the airbox off of the carb tops even with all the sealing clamps in place. I just don't trust it. I can revisit this again and see if there is some other intereference there.