We are scratching our heads here. I have a 22 Street Glide ST with RDRS 117 with factory heavy breather, and Bassani Road Rage 2-into-1. It has 4000 miles on it.

So I decided to go with an S&S 475 Cam kit with the plate and oil pump and a PowerVision tune to replace to Screamin Eagle Street tune it had previously. When I got the bike back, it was almost unrideable. The bottom end felt extremely rich and taking off from a stop took a lot of revving and clutch slip or it would bog down. It was like trying to take off in third gear. After 2k RPM, it would start to clean up. We tried 3 different base tunes(for science) and then I brought it to the dyno.

The shop with the dyno has had it for a week and they cannot get rid of that bog from idle to 2k. They have started with a couple different base maps and have spent hours on the phone with DynoJet tinkering with every possibility they could think of. Higher RPM riding feels fine, but getting going from a stop is still completely screwed up.

The shop mentioned something about making changes to the map and then hooking up the factory o2 sensors and then the bike starts reverting back to a richer setting? This was relayed second hand, so I need to hear it direct from the guy tuning it but the last time I spoke to him directly, he was wondering if tuning is even the issue. Is there anything that could have happened during the cam install that could cause this specific issue? Is there a tuning trick for the new bikes? He has not done any V-Twin newer than 2019 at that shop, as they mostly do sport bikes.

I've gone over everything in my head. Dirty air cleaner at 4k miles? It looks clean and free of oil. Bad spark? It would have issues throughout the range. I'm totally stumped and so are they.

 

Contact Fuel Moto, they will get a snapshot from your PowerVision, and set you up with a canned tune. You will have to pay for it if you did not buy the PV from them, but it will be totally worth it.

 

Deleted.

 

I've seen fuelmoto mention if you're getting a tune from them and your bike has the rdrs? System that you need tell them that. Something about disabling the rdrs before tuning then turning it back on. So my guess rdrs is messing with the tune

 

Thanks for the replies. He was disabling RDRS as far as I know, but I'll make sure to mention it. I don't want to pay fuel moto quite yet and toss out the $700 for the dyno tune. Are they charging $250?

 

Absolutely the rdrs will mess with it. On these bikes the ecm uses the throttle blade as part of the way to control power. The traction control has to be calibrated as it is set for stock power levels. As far as I know only the TTS has the ability to tune it. Other devices just use the "throttle blade trim" table to use the twist grip sensor to force the throttle blade to 100% @ wot. This does nothing for the rest of the tp's. These calibrations take a lot longer to tune properly.

 

Well...damn. So let me see if I'm getting this straight; I need to scratch the DynoJet PowerVision and find a shop that uses MasterTune TTS, otherwise it won't be done correctly? What's the alternative? Permanently disabling TC? The guy at DynoJet CLAIMS he has done RDRS bikes before.

 

In Fuel Moto's cam shoot out they did it on a 22 with RDRS
https://www.hdforums.com/forum/milwa...yno-114-a.html

 

Yes but that's only wot.

 

Well I might be wrong (won't be first or last time) but as far as I know TTS is the only one. You can turn off the RDRS, but you have to do it every time. Problem is TTS is still on back order.