I agree, Yuminashi is 166cc with CR of 12.8:1 that and coupled with bigger valves and ports,should be pumping almost 16hp+@ wheel.Mitch Detailed wrote:I've been talking to reggy at yuminashi. I've still gotta get info, but I'm hoping to pull funding to purchase a big bore kit and race head from him. All in all its quite expensive, but power is bar none.
Takegawa is relatively mild tune as it comes with only just under 13hp@wheel but Takegawa has kind of always been like that,they like to play it more on the safe side of tuning with scooters and try not to go overboard...
I tried to get Yuminashi for ages but the retailer here in Aus 'Braaap..' never were to interested to sell that kit,on several occasions i made contact to enquire about details and availability of the product id get return email that they will find out but never actually get back to me. So i gave up..Shame!
So far Takegawa is settling in quite nice, the more i ride it more i get its actual performance feel, takeoff is really good, no lag,full throttle and the front is kind of lifting up so thats a really good gain. Mid range is also up,im cruising 1/4 throttle with 1/3 throttle more than enough to accelerate fast. Feels like its getting most of its power from half throttle and the other half is still bit of power in there but not a huge deal its almost like the stock throttle body is to small and just cant feed enough air in on full throttle,so bigger throttle upgrade would be great,top power feels like it runs out of gearing to fast as the power drops of sharply close to 9k rpm 120kmh speedo...The Fi module has plenty adjustment for enriching the mixture in case one wants to go that way or add a pod filter...
Also i feel like the economy may have suffered little as ive just fuelled it other day and im on half tank so far and i may not get 200k as ive used to,but thats kind of expected,it is 170cc now and also still running in it in.Should get slightly better when loosens up a bit.Ill let you know what i get out of my first tank.
So impressions so far are good,i like it,feels good everywhere and its performance in this mild/conservative tune is in range of really good Scarabeo 200 4v head or 250cc piaggios..