Is 88 to much jet? By Bong (Read 883 times)

[Bong]

I just put a new Uni style filter on my scoot. Seems I striped a couple screws on the float bowl trying to rejet. Anyway, finally got screws and rejettted from a 75 To 88(easier than I expected). The scoot seems to love more gas but, Did I go to rich? Should the exhaust be opened up too?

[kr10k50]

Need a plug chop to tell for sure about the #88. 85 or 88 for sure w/o the BBK, I would think.

I would certainly open up the exhaust some as well. It's one of those cheap Mods, that doesn't cost you anything as long as you have the drill and bit. More A/F in will almost always want a little less restriction on the way out.

I just took the chrome end cap off.(3 bolts) and made 3 evenly space holes. I think I used 3/8" bit. Be sure and have a drill bit long enough to reach and penetrate the interior baffle. The result in sound for me was only slightly louder, with a deeper tone. Nice actually.

[Bong]

Thanks for the help!! My plug looks spot on from the color charts I've seen. I was going to buy a performance exhaust but, can I get the same results from drilling? I don't want a real annoying sound. What about opening up the exhaust port In the head pipe?

[kr10k50]

I'd certainly drill before shelling out the cash for a performance exhaust. But that's just me i guess. I figure when this nice new one wears out, I'm going that way with the replacement anyway.

My exhaust is a little louder sure, but not very much. The tone is deeper and to me less offensive than the rest of the scooters running around my area. It's certainly not as loud as the performance pipes I've heard recently. I'd almost say it just sounds "different" instead of louder.

Different types of OEM exhaust might react slightly different in tone and volume. The one my scoot came with was a rather nice one, and I have seen at least 3 or 4 different configurations out running around on other bikes.

The head case running the local Kymco dealership, told me it was a "Deluxe" stock pipe. Since the bike cost 600 new, i strongly doubt that, but he also throws away seat bucket bolts, and anything else he might find annoying or unnecessary when doing customer repairs.