This is an initial impression on the ZARD slip-on I fitted 2 weeks ago.
Bike is 2009 Griso 8V SE running on the stock map as delivered. Dealer tried to upload the GRS8V068 map twice but not successful. The bike is bone stock, running fine for the past 6500km (4000miles) on stock map and muffler.
I always want to have a little growl from the stock muffler so I ordered a ZARD homologated slip-on, that’s a street legal muffler with db killer tack welded to the end cap.
I have rode the bike 3 times since the change, each ride was 120km (75 miles) with a mix of highway and city riding. Here are my impressions after the change:-
- No noticeable back fire, no popping on deceleration and throttle closing.
- The rush felt during transition from pre 5500rpm to 5500rpm and beyond is less pronounced. The engine is pulling linearly with no “step” around 5500rpm.
- Engine rpm dropped to idling rpm very fast when I close the throttle and pull in the clutch lever, as if a lighten flywheel is fitted.
- Engine surge a little when I hold a steady throttle below 4000rpm, very annoying.
I am not sure I like the new muffler, I will give myself more time to get use to the new power delivery characteristic. Honestly, the bike felt not as fast based on my butt dyno but the sound of the new pipe is intoxicating.
Phang