Do I need to rejet with my mods?

[Anonymous]

Currently my 83 GS750E has a Vance and Hanes pipe from an 81 on it (yes it fit... it just needed some grinding), and Accel coils. But my problem is that I cannot get the stock air filter neck back on. The plastic shrank or something and I can't it to work. What I plan on doing is replacing it with a K&N filter replacement (K&N part number SV-7503). Will I need to rejet with these 2 mods? Also, where can I buy the K&N filter online?

[Anonymous]

I think any bike shop can get them for you and I know Dennis Kirk has them(the K&N's). I've heard of one or two sizes up on the main jets with the air box lid off for a V&H pipe. Actually I think that's their recc's, but don't quote me on this. I run a Kerker and didn't have to touch my jets until the K&N's went on, but I put the Dynojet kit in as well.Dennis Kirk has those too. I don't understand why the airbox will not mount back up? Are the rubber boots that stiff? Maybe try soaking them in hot water for a bit. Just a thought.Before I put my foot in my mouth, are you meaning the back half of the airbox where the filter is housed or the filter itself?

Jon Kram
________________________

81 GS750EX and proud of it !!

[Anonymous]

It's not the box that can't go back on to the carbs... The neck that holds the filter won't go back in to the box and I can't screw it down. When it is sitting in the box, the top still sticks about 1/8-1/4" above the airbox. If I forced the screws in, I would still have a gap there that air could get in. And from what I understand, K&N makes a filter that just replaced that entire neck piece.

[moto_dan]

It's not the box that can't go back on to the carbs... The neck that holds the filter won't go back in to the box and I can't screw it down. When it is sitting in the box, the top still sticks about 1/8-1/4" above the airbox. If I forced the screws in, I would still have a gap there that air could get in. And from what I understand, K&N makes a filter that just replaced that entire neck piece.

Are you fitting the nipple of the the air cleaner holder into the hole in the air cleaner box? When I had my stock air box this was sometimes a problem.

[Anonymous]

It's not the box that can't go back on to the carbs... The neck that holds the filter won't go back in to the box and I can't screw it down. When it is sitting in the box, the top still sticks about 1/8-1/4" above the airbox. If I forced the screws in, I would still have a gap there that air could get in. And from what I understand, K&N makes a filter that just replaced that entire neck piece.

Are you fitting the nipple of the the air cleaner holder into the hole in the air cleaner box? When I had my stock air box this was sometimes a problem.

I actually thought that nipple was a problem so I cut it off... but the stupid thing still doesn't fit.

[moto_dan]

It's not the box that can't go back on to the carbs... The neck that holds the filter won't go back in to the box and I can't screw it down. When it is sitting in the box, the top still sticks about 1/8-1/4" above the airbox. If I forced the screws in, I would still have a gap there that air could get in. And from what I understand, K&N makes a filter that just replaced that entire neck piece.

Are you fitting the nipple of the the air cleaner holder into the hole in the air cleaner box? When I had my stock air box this was sometimes a problem.

I actually thought that nipple was a problem so I cut it off... but the stupid thing still doesn't fit.

I'm trying to remember, but doesn't the pod also require fitting under a flange by rotating the pod clockwise? I'll take a look at mine this afternoon when I get off work, but other than what I've mentioned I can't think of anything else. Maybe someone else has a suggestion.

[Anonymous]

Yes, it does have to rotate under a tab in the front near the tank. But I just took a closer look at mine. Apparently the bike had been sitting so long outside, uncovered, and in direct sunlight that the bottom of the airbox had warped. What I am about to do is cut about 1/4" of plastic off the bottom of the filter housing neck, then add a screw in the front to be sure that nothing will move around. Will this idea work, or am I just asking for trouble?

BTW, I have pretty much given up on the idea of the K&N Filters because it'll cost $290 for the filters and the jets. I only spent $500 on the entire bike, and I would rather not spend half the cost of the bike on air filters.

[moto_dan]

Yes, it does have to rotate under a tab in the front near the tank. But I just took a closer look at mine. Apparently the bike had been sitting so long outside, uncovered, and in direct sunlight that the bottom of the airbox had warped. What I am about to do is cut about 1/4" of plastic off the bottom of the filter housing neck, then add a screw in the front to be sure that nothing will move around. Will this idea work, or am I just asking for trouble?

BTW, I have pretty much given up on the idea of the K&N Filters because it'll cost $290 for the filters and the jets. I only spent $500 on the entire bike, and I would rather not spend half the cost of the bike on air filters.

Before cutting anything...How 'bout heating the air box bottom with heat gun or possibly a hair dryer while applying pressure to return the box to the original shape?