Brands Indy Club MSV day with blue sky from dawn to dusk. Lovely. Bike did not miss a beat; just drank 500ml of Castrol Power 1.
Immediately obvious even on sighting laps that usually large amount of engine braking is much reduced. No drama though as 320mm discs are more than up to the job. Niel Spalding reckons you loose about 80% of the original engine braking which worried me before I rode it but it feels very good.
Clutch lever makes a curious 'cable has just snapped' type feeling when the clutch does slip but once it's done it once or twice it is no bother and then goes pretty much un-noticed.
Over all impression for what is a pricey mod is that it is very beneficial on the track. Flat out in fourth approaching Paddock and you can simply knock it down into third at very high revs, brake and turn in. No fear of the rear locking/fish tailing, beautifully stable and minimal over revving on the over-run. It used to rev very high with the stock clutch when changing down.
Same story entering Druids, bottom bend and Clearways. I never once felt as though I was rushing into a turn too fast (which I do when I am trying too hard) and with the prospect of rear instability gone, you can simply concentrate on going in faster and getting your line through the turn. Enabled me to really get the jump on many of the IL4's out of the corners.
I recommend the upgrade and believe that the claims Sigma make for the unit are all valid, particularly with a big high compression twin.
Just a shame that it is not a visible mod and the only evidence I have for my big spend is a Sigma Performance key fob and a small cardboard box in my shed!
TRX now tucked away for the planned winter mods.
The more I do to the bike the more I love it!