Plugging the connection tube on the 350YPVS dramatically richens the idle mixture.
With the Mikuni TM30-6 you need an idle jet around 30-35. Same bike needed a 17.5 idle jet after plugging.
Boost Bottle Dyno
Moderator: rztom
Re: Boost Bottle Dyno
Bye
Martin
Martin
Re: Boost Bottle Dyno
I don't know about the boost bottle but I can say for sure that 6mm reed spacers greatly smooth the midrange hole in the power delivery. My bike had the normal crap stumble at 6000 rpm and the reed spacer blocks completely eliminated that. The motor will pull smoothly right across 6000 rpm in top gear.T.RexRacing wrote: ↑Fri Dec 28, 2018 12:50 pm I tried that and found an off idle stumble I couldn't tune out w/30MM VMs.
While Barlow found a power increase w/boost bottle most of what I felt was an increase in driveability. That soft area 3-5K RPM where the stumble shows up sans airbox was much cleaner and a smooth transition into the powerband evident. Just like a good advance curve and careful jetting it's another contributor to a good rideable tune. To me it's the difference between "it runs" and "it rips."
I also run a boost bottle but I can't say for sure what effect that has on the smoothness of the power delivery, nor if it produces more or less power.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
'85 FZ750
- OldTZracer
- Posts: 240
- Joined: Thu Aug 05, 2010 2:21 am
- Location: Alberta Canada
Re: Boost Bottle Dyno
I played with a pair of DT175 boost bottles on my racer back in the '80s. It seemed to help with bottom-end at some tracks but I didn't pursue it as I was chasing more upper mid-range at the time...
"...its a 2-stroke ya twit - Its supposed to smoke..."
Re: Boost Bottle Dyno
Way back I found the boost bottle to smooth the 6k flat spot. That was my first RZ. Haven't run one since.
- Questo vecchio rz
- Posts: 1116
- Joined: Sun Aug 16, 2015 5:55 pm
- Location: Reconquista of California
Re: Boost Bottle Dyno
How the hell does boost in a bottle help a motorcycle...
Absurd snake oil....that what I'm callin .
Banshee (Baja) race bike,+ 2 A Arms,L.E.Ds, Toomey, +4 stroker IMS tank, run flats.
96 GSXR SRAD, Future Yoshimura rep.
85 custom Tri-Z
RZ/YZR bike(project)
86 VFR750 RC24 Merkel replica (project)
Royal Enfield Bullet 500
96 GSXR SRAD, Future Yoshimura rep.
85 custom Tri-Z
RZ/YZR bike(project)
86 VFR750 RC24 Merkel replica (project)
Royal Enfield Bullet 500
Re: Boost Bottle Dyno
It leans out your mixture until your motor melts down. Then you rebuild it with all of the trick parts, porting etc until you gain the performance that you were looking for originally.Questo vecchio rz wrote: ↑Sat Jan 05, 2019 5:11 am
How the hell does boost in a bottle help a motorcycle...
Absurd snake oil....that what I'm callin .