S2R red line?

Bitza · 12-10-2021, 01:03 PM

Hi all,

Now I've done a few running-in miles it's getting round to the time to get my Ecu dialed in. Basically the engine is a S2R taken out to 98mm, raised comp ratio (10.8 : 1,at a guess), Vee2 300 cams, lightened flywheel, altered the balance factor to favour higher rev range, injected, with 45mm headers & open mufflers. So my first question is what is a sensible rev limit? (presently set at 8.5 I think). Second question has anyone any experience first or second hand of Motohub in Stoke-on-Trent. Bitza

Zimbo · 12-10-2021, 06:19 PM

Pretty sure the S2R800 I had wouldn't rev past 8.5K either, the hi comp pistons should favour mid range torque rather than top end power, a lot I suppose depends on how the cam profile affects the torque curve?

slob · 12-10-2021, 07:15 PM

If you haven’t lightened pistons/rods and valvetrain the stock redline will be about right.

Darren69 · 12-10-2021, 07:42 PM

The 2V usually stop making power way before the redline anyway, unless it's been gas flowed? I bellieve that is one of the limiting factors when tuning, so really no need to rev it to the redline. 8.5K sounds about right though.

12-10-2021, 01:03 PM	#1
Bitza Bronze Member Join Date: Jul 2006 Location: Poole Bike: M900ie Posts: 470	S2R red line? Hi all, Now I've done a few running-in miles it's getting round to the time to get my Ecu dialed in. Basically the engine is a S2R taken out to 98mm, raised comp ratio (10.8 : 1,at a guess), Vee2 300 cams, lightened flywheel, altered the balance factor to favour higher rev range, injected, with 45mm headers & open mufflers. So my first question is what is a sensible rev limit? (presently set at 8.5 I think). Second question has anyone any experience first or second hand of Motohub in Stoke-on-Trent. Bitza __________________ Bitza

12-10-2021, 07:42 PM	#4
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,023	The 2V usually stop making power way before the redline anyway, unless it's been gas flowed? I bellieve that is one of the limiting factors when tuning, so really no need to rev it to the redline. 8.5K sounds about right though. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

12-10-2021, 06:19 PM	#2
Zimbo Too much time on my hands member Join Date: Apr 2003 Location: Stonehouse, Glos Bike: Multiple Monsters Posts: 2,079	Pretty sure the S2R800 I had wouldn't rev past 8.5K either, the hi comp pistons should favour mid range torque rather than top end power, a lot I suppose depends on how the cam profile affects the torque curve?

12-10-2021, 07:15 PM	#3
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,712	If you haven’t lightened pistons/rods and valvetrain the stock redline will be about right.