How much POWER? Aprilia RS660 on the Dyno with Rapidbike Module and Jetprime bell mouths 

We started with a base map that came in the module, which put us around 92bhp. Non of the mods made massive differences, but any gains are worth having if they're as easy as a few minutes and some dyno time! For reference our cf moto 650, with lots of expensive engine parts and a lot of build time, made 92bhp on the same dyno. So it's already faster than all but the very best kawasaki's, with a stock engine! And the watch is a Christopher Ward c11 makaira Pro 500. I like my mechanical watches, and that's the daily beater

LOL

I'd rather beat them in a straight fight and I'll happily sell them the parts or the services to build a good bike 😁

@@obsession_engineering Sounds like a win-win to me no pun intended :D

@@obsession_engineering Im sure your competition at these levels of tuning have already gone done the same path.. Im looking at the class after decades away.. & wondering what the costs/benefits would look like of the RS/Trophy bikes of Aprillia's vs the highly modded competition.. older age instills sensible budgeting mindsets .. & thinking the Aprillia would be the sensible option for the same end goal.. being competitive!.. cheers from NZ

It's called an H line setup (suppose it should be h not H). If you can measure with the bike on a headstock stand and the forks topped out, I just run a tape measure on the route I want, ideally with just a little slack in case you alter how far through the yoke you run the forks. Trying not to have the line tight against the leg, so it doesn't rub. I don't have a specific measurement though. If you speak to B+C they can make them however you like. Banjo ends can be almost any angle at the calipers and mc, colours, etc can all be custom. Hope that helps

@@obsession_engineering Thanks Dave, that's really helpful 👍. I have to say this setup just looks so neat/right and makes other setups look wrong.

The ignition map can create a throttle drop out if you're not careful. It's got lots of features so has advantages but if you can get the up map to fuel correctly it'd save additional wiring

The difference is absolutely minimal. A correctly maintained x ring chain is very nearly as good for power as a non ring, and lasts much longer. We also struggle to get a high strength rated non ring chain as they're mostly made for motox and would struggle with road racing. Add in the extra maintenance time and it's really not worth it

The UK bikes at standard are usually 88-90 bhp, 92-95 with an exhaust and map. There are of course plenty of variables, correction values etc too

It can't change ecu switch properties such as the fan but we have no need to change that. Also doesn't change throttle opening

@@obsession_engineering so better off with a flash then like brentune

A loss compared to what?

They tune really well, but the current TT rules mean throttle bodies on bikes over 650cc can't be bored, which very much limits the yamaha. Hopefully the rules can be tweaked to let them in next year

@@obsession_engineering I knew you’d know! Thanks fella. Between tt plus and yours and other riders vids this year’s event was incredible,I lived every min! the tt is in my bucket list just not sure when .

Mine has 98hp. Highly modified MotoAmerica pro bike.

On short circuits I preferred the stock stacks after testing back to back. They seem a little smoother!

@@obsession_engineering Were you ever able to fix the dip in midrange from having the Jet Prime stacks installed. I really don't want to give up alot of midrange. I am building a RS660 to run in 4 hour endurance races and would rather have more midrange than top end.

Also have you tried using 2 of the oem short stacks. I have heard that also works pretty good.

There is a power commander available now. We used a rapidbike module and there is reflash software coming too

We stayed stock. In my experience air filters in modern bikes are perfectly good and aftermarket don't generally help