Grand Prix 250
Main Motorcycle: Thunderbird storm
Join Date: Oct 2012
Other Motorcycle: Vespa GT200
|Thunderbird Cruiser Chat Cruiser chat for the the Thunderbird twin|
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The air intake is under the seat. You may be getting a backfire. heres the things with aftermarket pipes. Some are made to work WITH the catalytic converter in place. Some eliminate the cat. Others give you the choice of either. All of them tell you to use the tors map with them NOT because it's optimal for a catless setup. In fact, it's quite the opposite. But the reason they recommend that tune is because there IS NO proper tune for running catless! So they couldn't sell the pipes if they tell you that, so they say the tors tune is fine. And it is to a degree. I mean, the bike will run, but it will not run optimally and it will probably run pretty lean which is not good and would explain the backfires if thats what u r feeling.
Now, that said, i'm 95% sure the forans bypass the cat but i'm not sure. If you know they do i would suggest you run a map one of the member had made via dyno tune with tuneECU. o just by getting a cable for tuneECU and downloading the tuneECU software you can load that tune and your bike will fun much stronger and won't pop as much and won't backfire at all. I used that tune then did the seat hack (allows more air in) and added fuel to that map and that made a huge difference. The bike gained LOT of power. Surprised the heck outa me.
Well, like i said there IS no "adjustment" for this that they will have except to sell you a power commander or tuneboy and dyno tune the bike which will run in the neighborhood of $700-800. Thats why i mentioned that custom tune one of the members has. I can point you to the download if you want that. Then you can load it into the bike with tuneECU and a cable for it. Total cost, about $10-20 and the results will probably be as good or close as spending that $700-800 i mentioned. If you should decide to do that let me know and i'll guide you thru it.
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