If you have ever experminted w/ hp, cu inches, engine mods, gear ratios etc etc, you will know that there is no substitute for cubic inches.
Anything less than a bigger piston,....or a longer stroke, is not going to make any worthwhile difference in the crusing range of the Savage/s40.
Acceleration thru a 1/4 mi,..... yep, any mods to intake exhaust etc etc can all make a little difference.
But you know a 350-500 cc that will out cruise the Savage 2 to 1 ??? Yes, if you can stand the sound of that little motor spinning at 12K rpm !
And a poll showed the mods to intake exhaust didn't do much over a stocker for top speed.
Fuzzy5150 wrote on 04/16/11 at 05:44:35:nigel wrote on 04/16/11 at 05:14:39:I don't own one but from all that I have read I think a few simple modifications would make this bike meet any reasonable legal highway requirement
1) Change the rear tire to a 90 aspect ratio of the same size: This increases the rear wheel diameter and therefore the final drive ratio so that it curuses at a slightly lower RPM
2) supertrap free flow exhaust or equivalent
3) K and N free flow air filter (These two things together ad a little extra oomph to offset the loss of low end grunt by the higher final drive ratio in all gears with the tire change)
4) wind shield (air pressure on the trunk is a factor on any bike with upright seating)
5) Modified seat or airhawk cushion for longer rides to cut the vibration factor, thogh this will alread be partly soved by (1) rear tire mod Nigel
I've got a like-new 90 aspect ratio tire that I'll sell you.....well, except for the 2 surgical-like trenches around the shoulder of the tire where the pillion bolts rub when riding 2-up. I'm installing the factory recommended 80 aspect ratio tire today. BTW, the 90 aspect ratio tire only gave a 2 mph lift between radar and indicated.