yamaha zuma belt length

Need help with your non-Honda scooter? Yamaha, etc? Post here!

Moderator: Moderator

Post Reply
User avatar
scooterwerx
Elite
Elite
Posts: 894
Joined: Tue Oct 07, 2008 11:43 pm
Location: redlands, ca

yamaha zuma belt length

Post by scooterwerx »

anyone have any experience with the polini kelvlar belts for a zuma? it seems like its too short, and not riding on the outside of the rear pulley, raising the effective ratio for takeoff. even with the black malossi clutch springs, the stiffest ones, its a turd off the line. once it gets up it goes, nut the top speed is less too, probably because the short belt rides too low on the variator. it is like taking off in 2nd gear, and only getting 4th in a 5 speed...anyone know if they sell a belt a few mm longer?
User avatar
bakaracer
CBR1000RR
CBR1000RR
Posts: 3584
Joined: Tue Jan 27, 2009 9:51 pm
Location: tacoma,wa
Contact:

Re: yamaha zuma belt length

Post by bakaracer »

are you running a chamber pipe?if so what kind?as for the belt nor riding to the edge of the face drive,its the rear pulley sheave.it has a welded bead on the inside which acts like a restricter.if you can find a rear pulley sheave from a tng venice or ls49,eton matrix 2,eton quad 50,70,90,polaris scrambler 90.if you try to grind down that welded bead the pulley will break and the belt will get stuck in that little chamber after the welded bead.
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
User avatar
scooterwerx
Elite
Elite
Posts: 894
Joined: Tue Oct 07, 2008 11:43 pm
Location: redlands, ca

Re: yamaha zuma belt length

Post by scooterwerx »

huh, interesting, running the arrow pipe, its definitely for high rpms. i found some athena belts, they are substantially longer than the polini belt, slightly longer than the oem belt. i will look for the rear pulley for sure then, thanks for the tip!
User avatar
burnt_toast
Veteran OG
Veteran OG
Posts: 3591
Joined: Sat Jul 31, 2004 8:00 pm
Location: Atlanta, GA

Re: yamaha zuma belt length

Post by burnt_toast »

you want a jog90 length belt, it is 788 or 787mm long.

stock zuma/jog50 belt is 780
projects galore :nerd:
User avatar
scooterwerx
Elite
Elite
Posts: 894
Joined: Tue Oct 07, 2008 11:43 pm
Location: redlands, ca

Re: yamaha zuma belt length

Post by scooterwerx »

i got a jog 90 belt, it was way too long, slipped badly on takeoff it was so long. the athena belt is longer than the stock belt, way longer than the polini, and shorter than the jog90 belt, by just enough to grab on takeoff. it still rides low, but i think now its because of the pulley...any sources on those bakaracer? thanks!
User avatar
bakaracer
CBR1000RR
CBR1000RR
Posts: 3584
Joined: Tue Jan 27, 2009 9:51 pm
Location: tacoma,wa
Contact:

Re: yamaha zuma belt length

Post by bakaracer »

your best bet is to check ebay or try on the other scooter forums for sale section.try and see if you can get your hands on a jog50 rear pulley and see if it slides on the rear shaft.more of those around.
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
User avatar
burnt_toast
Veteran OG
Veteran OG
Posts: 3591
Joined: Sat Jul 31, 2004 8:00 pm
Location: Atlanta, GA

Re: yamaha zuma belt length

Post by burnt_toast »

yup, find larger rear pulley and jog90 belt works like a charm
projects galore :nerd:
User avatar
scooterwerx
Elite
Elite
Posts: 894
Joined: Tue Oct 07, 2008 11:43 pm
Location: redlands, ca

Re: yamaha zuma belt length

Post by scooterwerx »

ahhh i see, so would the pulley off of a vertical jog work, or only the 92+ horizontal jog? thanks dudes!
veedubh20
CB900F
CB900F
Posts: 2052
Joined: Sat Dec 31, 2005 7:00 pm
Location: Honolulu paradise island

Re: yamaha zuma belt length

Post by veedubh20 »

rear pulley is 3aa on 92- up, just check for vertical jog pulley. is same #
Post Reply