i have a shortened jardine with removed cone on my bike i got an hetv eliminator from my friend, bolted it in place and put a tune in with a comparable slip on and at wot at 3k it falls on its face then at 4k or so picks right back up. looking at the tables 3k to 4k goes from +55 at 2750 to like -23 at 3k. i added some fuel and it helped but still falls for that rpm. i added lots of fue,l lil fue,l took lots of fuel, added a little bit of fuel.......still there, any ideas?

i should just get a dyno apt but for now id like to get it better till then

 

Get rid of the htev eliminator because its your problem. I tried one on my 954 and it sucked so bad I removed it and went back to stock in less than a week. The htev improves low-midrange power. It was put there by Honda for a reason and if you put it back with a working servo unit your problem will instantly go away.

Why spend money on a custom dyno tune just to try and get back the power you lost by removing the htev?

 

i was under the assumption that it was there for noise and environmental reasons.

second if its so good for the bike why do all full systems eliminate it? not trying to be a wiseass just curious.

and yes the bike sees a lot of track days so its not just a city cruiser.

I understand that just removing the hetv will result in less power, but removing and tuning with it out can result in more power than leaving it in im all for it. not afraid to get my hands dirty and try new things out

 

These bikes were built by Honda to run better with the htev and flapper in the airbox. Both systems do reduce exhaust noise to help meet environmental restrictions so Honda designed these bikes to run the best with them installed. Check out this link http://world.honda.com/environment/r...ort_E_full.pdf and scroll down to the motorcycle section. Notice how it states it improved output characteristics. This means exhaust flow.

A full exhaust does remove the htev but requires lots of tuning to smooth out the low-midrange rpms. A full system saves a lot of weight and helps more on the top end and can actually reduce low end power and torque due to flowing too much air. If you do mostly track days then a full system may help since you stay higher in the rpm range near full throttle most of the time. For the street I think the overall ride of the bike will suffer a little with a full exhaust since you will be in the lower half of the rpm range much more.

I installed a Hass Eliminator on my 954 and used the map from Hass. The elevation and temps were very close to where I live and from the start it was terrible. The exhaust sound was great with the htev removed but the ride suffered. Pulling out from a stop required more clutch and throttle. I drag race fairly often so I took it to the track. My times dropped over 2 tenths and the bike was very inconsistent. It was very hard to launch the bike. I went back to stock for the next race and my bike ran great.

 

did you get a huge stumble at like 3k? almost like its breaking up?

 

Yes, it was very bad around 3-4k.

 

blahhhhhhhh ok ill go to the dyno and do some pulls and some tuning then ill do it with the hetv.......whatever one has a better graph wins hahahaha thanks doc