SPEC II rpm band
Moderator: rztom
-
- Posts: 89
- Joined: Sun Jul 24, 2016 3:02 pm
- Location: Virginia USA
SPEC II rpm band
What rpm band are the 1986 era SPEC II pipes designed for??? mid range or more top end. Thanks.
1985 RZ350
2000 Ducati 996S
WERA V2 National Champion
2000 Ducati 996S
WERA V2 National Champion
Re: SPEC II rpm band
They are all upper end. You need a big bore kit before you want to think of midrange.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
-
- Posts: 89
- Joined: Sun Jul 24, 2016 3:02 pm
- Location: Virginia USA
Re: SPEC II rpm band
You confirmed what I thought, thanks.
1985 RZ350
2000 Ducati 996S
WERA V2 National Champion
2000 Ducati 996S
WERA V2 National Champion
- Questo vecchio rz
- Posts: 1116
- Joined: Sun Aug 16, 2015 5:55 pm
- Location: Reconquista of California
Re: SPEC II rpm band
You can Email Gary and ask him, He may take awhile to respond but he will explain all his designs.
I met him in 1985 due to the fact I had the 1st (Calif) RZ he was able to aquire, he it used car it to compare vs his 49 state racebike/test bike.
I later had a set of the 85-86 pipes on my RZ, I will tell you that the early versions definitely fell short of the performance of Toomeys, especially down low and mid range, when fitted w Toomeys the Spec 2 equipped bike always fell 3-4 bike lengths behind under full throttle acceleration, I don't remember them matching the Toomeys in top end either, but sustained high RPM use on a race track, is likley where he had them tuned to perform, and on a road course the benefit of his design likley gave good results. In the US, many if not most race RZs utilized either Toomeys or Spec 2s. Gary's pipes were built fairly durable as well, albeit marginally heavier.
Gary is a true engineer, math calculations, and tests many different designs he knows mist there is to know after almost 45 years of Yamaha twins.
I met him in 1985 due to the fact I had the 1st (Calif) RZ he was able to aquire, he it used car it to compare vs his 49 state racebike/test bike.
I later had a set of the 85-86 pipes on my RZ, I will tell you that the early versions definitely fell short of the performance of Toomeys, especially down low and mid range, when fitted w Toomeys the Spec 2 equipped bike always fell 3-4 bike lengths behind under full throttle acceleration, I don't remember them matching the Toomeys in top end either, but sustained high RPM use on a race track, is likley where he had them tuned to perform, and on a road course the benefit of his design likley gave good results. In the US, many if not most race RZs utilized either Toomeys or Spec 2s. Gary's pipes were built fairly durable as well, albeit marginally heavier.
Gary is a true engineer, math calculations, and tests many different designs he knows mist there is to know after almost 45 years of Yamaha twins.
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