Jay is one of the UK's foremost experts on upgrading the Honda RC51, or SP2. In this short video he speaks with fellow owner Adam Smallman about the changes that matter on track and which of those are best for road use.
The best modification that I made to my SP-2 was the fitting of magnesium alloy wheels,and replacing the rear shock with a Fiske unit,enhanced the handling beautifully.
I never have had trouble turning into corners,the bike goes were i put it,only had it from new for just 20 year's not long i know ,two many experts have opinion's obviously i know nothing .I don't see many passing me on the track .standard rd bike straight through exhaust ,supper oct petrol, Castrol t4 race oil ,standard rd setup. 13 st ride 'r
Good mods, I would add remove quieting gears and a crankcase release valve (HD drag racers use them) good for another 2.5 rwhp. Biggest problem is the stock ECU and cooling once mods are done. Don't know anyone who has unlocked the ECU?
I find it very difficult to believe that his bike is FOURTY kilos lighter than standard! I know the exhaust is heavy, but other than that and maybe 1 or 2 kg in the wheels, where the hell is the extra 20-30kg coming from?!
I think he ment if full tank vs dry weight when reduced weight 🙂 40kg definately too much. My durbahn sp with carbon seat unit, and 10ltr plastic tank under seat with carbon tank dummy, full carbon fairings, battery, light wheels, full titanium exhaust and etc.: small things weighs 163 dry
WHAT do we need to do to reduce its weight to 179 kg with full tank of fuel... I assume 164kg dry,, ( what do I need the change or take off to get to 164kg dry)
Assuming yours is standard, replacing the weighty cans (I use Arrows), wheels (Dymag UP7X aluminium - carbons if you feel confident they can be looked after during tyre changes), battery (if you can find a reliable lithium brand) and aftermarket aluminium clip-ons will help. After that, it's harder to make the difference cost-effectively.
