Exhaust and minor mods versus cylinder head change out?

Torpedo

.040 Over
Joined
Oct 15, 2012
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I think I may keep my '12 Roadster.(back is calmed down...for now_ I moved the foot controls forward 8" to improve legroom so now a horsepower question.

With the advent of some new exhaust systems coming down the line along with some of the new air cleaner assemblies, is it possible to get 170 hp without modding the head?

Or...the Carpenter 210 kit and have done or do it myself?

I'm curious as to the power potential of the base motor but want more HP. My last bike was a Ducati Hypermotard EVO SP with a weight of roughly 350 pounds and 110 hp. Power to wt ration of 3.97. Rocket is approx. 5.52. 210 kit would put me under the Ducati. I know they are different bikes with different purposes but am looking for closer power to wt.

Any thoughts on the immediate future? and which way I should go..

Carpenter will cost 5-6K with pipe and all.
Pipe/tune etc. 1600 approx.
I don't want to get into the shortblock.
 
Have you read this post on the 'Rocket III Resources' thread?


So with a set of Jardines (or better), Nev's 'baby street cams', a Ramair filter and a Nev tune - you are there. Sounds like a bargain to me.
 
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From what I've seen posted on here you should be able to get to the 150 - 160 HP range with a good exhaust (Reband or Carpenter type system), an upgraded intake, and a good dyno tune. Don't know that I've seen anyone go to 170 HP without some engine mods
 
As noted here many times it is possible to get 165 with Reband exhaust, filters and tune. Worst I have done with that exh is 162. Please not also the exh mentioned by battersea above was on a classic. I reckon if that bike had a Reband it would do close to 180.
 
If I was going to spend that kind of money (for 210 horse), I'd go the full monty for 240. Oh wait, I did.
 
I would but the 30 horse doesn't seem worth the extra 2k.. But would be nice for the power to wt. I dont' want a huge job to take all spring. I'm wondering how long it would take to change the head.
 
And Reband claims 8 more hp with the new shorty muffler. Cant wait to get home and put mine on.
 
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