Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Suzuki Burgman modification (aerodynamics + gearing mods)

janvos39 · 07-18-2009, 05:05 PM

I had a problem with the overdrive in my gearbox. The shifting pin broke when shifting down. Since this shifting has to happen without the help of a clutch it is a very delicate moment. Normally i drop the speed to 25 mph before shifting down from the overdrive gear to the first gear. Only once I did this at a higher speed with the broken pin as result. So I had to go back to the standard Suzuki gearbox. And immedately the MPG dropped.
The plan is now to work with a stronger shifting pin including a support ring and to add an overrunning clutch in the wheel drive shaft. So shifting down will be done without the bike driving the gearbox.
This will also allow me to run idle when throttle is closed and do some coasting or when I have a larger battery installed do EOC.

07-18-2009, 05:05 PM	#75 (permalink)
janvos39 EcoModding Apprentice Join Date: Jan 2009 Location: Belgium Posts: 159 jvsgears - '14 Skoda Octavia Team m8 90 day: 52.47 mpg (US) Thanks: 22 Thanked 38 Times in 28 Posts	I had a problem with the overdrive in my gearbox. The shifting pin broke when shifting down. Since this shifting has to happen without the help of a clutch it is a very delicate moment. Normally i drop the speed to 25 mph before shifting down from the overdrive gear to the first gear. Only once I did this at a higher speed with the broken pin as result. So I had to go back to the standard Suzuki gearbox. And immedately the MPG dropped. The plan is now to work with a stronger shifting pin including a support ring and to add an overrunning clutch in the wheel drive shaft. So shifting down will be done without the bike driving the gearbox. This will also allow me to run idle when throttle is closed and do some coasting or when I have a larger battery installed do EOC. Last edited by janvos39; 07-24-2009 at 08:42 AM..