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Posted by DC
- May 29, 2013, 07:04:44 AMIt's probably unrelated, but I ran a can of Seafoam(tm) through a tank of gas and my backfiring is gone .. . . . . knock on wood.
Posted by teamster6
- May 29, 2013, 00:19:23 AMI run the 2001 1500 I have that has the straight cobras that were stock and its smooth and fast. I also have a 1500 nomad carb model and the drifter has a lot more pickup and go than the nomad by far.
surpriseingly though I have a 1200 voyager and it will outrun both of them. That inline four is a beast.
t6
Posted by nhtrikes
- May 20, 2013, 08:10:07 AMFinally found the time this weekend to remove the reed valves and associated emissions stuff and install the coasters. Those instructions from gadget's page were perfect. Very easy to follow. Hardest part was getting my fat fingers in there to remove the little clips from the hoses and getting the valve on top of the cylinders squeezed through the frame and cylinder heads. Took her for a ride and the less popping but seems to have more backfire. Either that or now I can hear more backfire on decel now that most of the popping noises are gone. Will have to go with a power commander. Is the backfiring a sign of running lean? I am looking at the Cobra FI2000 powerpro with CVT. Seems like the easiest and lowest price. It sounds like it will take care of the problem. Anyone have any experience with this model? Thanks!
Take care,
Pete
Posted by chief
- March 15, 2013, 16:38:06 PMif you plan to have the bike dyno'd and you want the most adjustment go with the much more expensive PC - new model whatever that is - or one of its clones. There are existing maps which will help tune the bike... at least put it in the ballpark until you dyno.
For simplicity and a lower price, go with the Cobra or one of its clones/competitors. I wanted simplicity and the low price... There are others out there so you might want to do some research to determine which one serves your needed.
Posted by nhtrikes
- March 15, 2013, 12:00:33 PMOuch! Thanks for the info Troll . . . and I thought 200 was a lot 
Posted by Troll
- March 15, 2013, 11:55:31 AMThe power commander is like 2x that much....
Posted by nhtrikes
- March 15, 2013, 10:51:59 AMThe Cobra Fi2000 PowerPro doesn't seem to need programming. It's auto adjusting to all conditions with or without O2 sensors. It monitors the system more than 80 times per second and makes adjustments continously.
"This is the product that continuously tunes your fuel-injected motorcycle every time it accelerates. You get the perfect fuel so that your bike produces the most power every time you snap open the throttle." Cobra.
So they say. It's priced at @$200. I don't know if that's pricey or not. Hopefully I can get by without it, if not, I may have to dip into the piggy bank and get me one, unless of course the Power Commander is much more economical. It's great that they will help you program it, shows good support from the company.
Joe got back to me right away and has the coasters in stock. Ordered a set. One of several little projects when (hopefully) I get her back! I have another question regarding my Corbin 2 up seat but I'll start another thread for that.
Thanks again everyone!!!
Take care,
Pete . . .
Posted by 49Reo
- March 15, 2013, 10:32:02 AMI put V&H pipes on mine, and I am running a Power Commander III USB; great unit, was having a bit of trouble programming it, so called them, a techy logged into my laptop while it was hooked to the bike and programmed it. No popping on decel, got more acceleration power, pipes run clean. Haven't looked at the Cobra unit though.... 
Posted by nhtrikes
- March 15, 2013, 07:23:12 AMThanks for education Chief! That link explained it pretty well, easy to understand. That Fi2000 is pretty amazing, what they can pack into a tiny little box nowadays! I will start with removing the reed valves 'cause I too like the cleaner cylinder look. It doesn't sound like I'll need the box but if she starts to act up, lack of power or continued popping, then I'll have to put one on. I'll contact Joe Norris so I can get those coasters before I get the bike back, I hope 
The mechanic did seem a little too excited the last time I saw him after the paint job, DC. Now ya got me even more worried. I don't who was drooling over the bike more, me or him. Kinda glad I have both seats right now, helps keep the mileage down 
Take care,
Pete . . .
Posted by DC
- March 15, 2013, 07:08:44 AMQuote from: nhtrikes on March 14, 2013, 13:13:16 PMAnd what makes you so sure the mechanic is going to give it back to you? He won't want to, after taking it out for a ride.. . . . . I"m hoping my mechanic will take it for a test drive before giving it back to me, soon I hope, . . . .
Posted by chief
- March 14, 2013, 20:16:28 PMI had already removed the smog stuff and used coasters, so "marbles" weren't needed. I prefer the coaster method and total removal of all that useless stuff. The Big Willy's breath well apparently so the box was necessary.
Posted by pcarrell
- March 14, 2013, 18:14:39 PMI had a little popping before I marbled it. $1 for a bag of marbles and a couple of old hose clamps and the popping was gone.
Posted by chief
- March 14, 2013, 15:29:09 PMIf you get backfiring and/or deceleration popping... you will need to get something to control it.
The following might give you some background... this is the new one Cobra has but the essentials are there. The box just continuously monitors and adjusts the air/fuel mixture beyond what the EFi is capable of doing.
Posted by nhtrikes
- March 14, 2013, 13:13:16 PMWhat exactly does the add-on box do? Adjust air intake for the FI? Not planning on touching the airbox right now, Chief, though you never know . How will I know if I need to add one? What are the symptoms I should be watching for that will let me know? I"m hoping my mechanic will take it for a test drive before giving it back to me, soon I hope, to let me know if it needs one. He said he didn't think so but wasn't sure. Sorry for the many questions ! I've never messed with exhaust on a motorcycle before. My old bike, '76 Triumph Tiger 750 had a single carb and I only changed out the mufflers not the pipes. Might be selling her this summer, maybe not. Hard to part with her 'cause I've had her for 26 years, lotta memories.
Posted by pcarrell
- March 14, 2013, 12:25:19 PMHmmm, I have the V&H Longshots with the baffles that come with them, like the OP, and only needed to marble the engine to have it running right.