|
|
Post by usmcdoc on Dec 1, 2011 21:16:16 GMT -5
Looking to 'up gear' my scoot..but the diff gear ratios confuse me...which would add more top end?
From scrappy site.....-->JOG Minarelli performance transmission gears.
Quality Taiwanese performance transmission gear set for your 1E40QMB 2stroke. These come in 14x34 and 13x34 teeth. Note: May not fit QJ engines correctly. Super great price. $29.95
pick your ratio
So would it be 14x34 or 13x34.....and does anyone know the stock ratio? :dunno:
|
|
|
|
Post by jmkjr72 on Dec 1, 2011 21:24:44 GMT -5
i think the stock ratio can very
on 2008 to 2011 zuma the final drive ratio is 13.228:1
on the 2002 to 2005 14.664 to 1
the adly shows a 9.921 to 1 from there parts dia
for up gears on a kitted zuma we shoot for 11 to 1
so for 08s thats going with 43/13
for the 20 to 05 thats 42/14
|
|
|
|
Post by 2strokd on Dec 2, 2011 9:41:35 GMT -5
You need to know what trans style you have first. They are two different types. One with the gears on the cvt (belt) side. The other kinda has the gears hanging off the back exhaust side (longcase).
First you will need to know this, then you can pick your gears. Ide say something in the 11:1 neighborhood is good. I run 11,s in my drag scoot for now.
|
|
|
|
Post by jmkjr72 on Dec 2, 2011 19:35:28 GMT -5
you know that never dawned on my that some of the long cases are diffrent then the short cases
i know with yamahas its the same gears as the case is longer
but now that you say that i have seen that some of the long case clones have parts that stick out past the belt cover
so dang unless i build a screamer i will have to down gear or skeedr will be faster then me if read the service manual right you have a better set of drag gears then i will
|
|
|
|
Post by usmcdoc on Dec 2, 2011 22:41:26 GMT -5
ok..my bad..did not mean gear ratio....I meant the number of teeth on each gear for the stock setup.....i.e. 13x32....or something like that. Looking at Malossi gears and they come in...14x35....15x36..and 16x35. I am only trying to gain a bit more top end for my new Malossi 72 Minarelli engine.....as it has plenty of torque being wasted..and could turn a higher ratio..... What size gears have others tried with sucess?..which increase speed....the smaller nubmer or larger number gear sets? :beatup:
|
|
|
|
Post by jmkjr72 on Dec 2, 2011 22:44:19 GMT -5
you want to add the gears that gets your ratio closest to 11:1
|
|
|
|
Post by usmcdoc on Dec 2, 2011 22:58:06 GMT -5
So 11:1 is the magic number we seek?...is that higher than standard?..how do we figure a ration based on the number of teeth on each gear?....been awhile since math class for me....so ratio and proportion has escaped my 50 yo brain...tx..
|
|
|
|
Post by jmkjr72 on Dec 2, 2011 23:14:17 GMT -5
hopefully this chart i ahve for the zumas helps you figure out what you need you divide the gears out then times the primary and secondary and you want to get as close to 11:1 as you can that is for a good 70cc engine it should be lower then what you have stock Attachments:
|
|
|
|
Post by 2strokd on Dec 3, 2011 7:31:50 GMT -5
I was running 13,s thats why i used a wheelybar. Running straight cut 11,s now.
|
|
|
|
Post by usmcdoc on Dec 3, 2011 10:03:54 GMT -5
2strokd...I don't want low end power....looking for an increase in top end by about 5-7 mph... I have twist n go Venice that is factory geared so low....on a hard launch it tends to do about a 4-6 in wheelie...tops out at only 30...but gets there right NOW....it is unsafe for the kids to ride in gravel as a quick launch sends them into a series of 'doughnuts'...  My 72 cc Malossi has enough power to pull higher gear ration...in fact at 35 it is screaming away....wasting all that power and high revs.... Looked at the ratio chart posted here..which confuses me....cause I am looking for the actual numbers on gear sets...i.e. 12x36....13x35 etc....any help on that would be great... Maybe heavier roller weights too will help?....I own mostly 4 stroke 80 BBK's and taking advantage of a 4 strokes torgue is easy for me...as they like to lug and pull.....where as a 2 stoke needs to rev to get into its powerband... |
|
|
|
Post by 90GTVert on Dec 3, 2011 10:16:23 GMT -5
|
|
|
|
Post by jmkjr72 on Dec 3, 2011 10:48:20 GMT -5
a sport malossi kit wont have pull anything much lower thena 11:1 final drive ratio real well at
but like brent said before you decide what to put in you need to know whats in there first to figure out what to get
|
|
|
|
Post by usmcdoc on Dec 3, 2011 10:49:45 GMT -5
90GTVert...tx....I am gonna start calling you Goggle version 2....cause you have more info and resources than they do..
|
|
|
|
Post by bigkahuna427 on Dec 3, 2011 11:03:49 GMT -5
I believe numbers you are getting for the gears from the website are gear tooth count. The smaller number is the drive gear the larger number is the driven gear. To figure the ratio divide the driven gear by the drive gear (larger number divided by smaller number). The lower ratio number the lower the engine will rev at a given speed. The higher that number the better acceleration and higher RPMs at the same speed. There may be other gears in the final drive to come up with your final gear ratio to the wheel. Certainly the ratio may differ dependent upon wheel size, engine type, displacement or what ever goal you are trying to achieve. If you have modified your engine to develop more HP and torque and you are looking for more speed you are on cue with going to more of a highway gear.
|
|
|
|
Post by usmcdoc on Dec 3, 2011 23:37:28 GMT -5
bigkahuna427...so then which of these gears will give me more top end? the 14x34....or the 13x34.....that is all I am trying to figure out... :doh: Attachments:
|
|
My 72 cc Malossi has enough power to pull higher gear ration...in fact at 35 it is screaming away....wasting all that power and high revs.... Looked at the ratio chart posted here..which confuses me....cause I am looking for the actual numbers on gear sets...i.e. 12x36....13x35 etc....any help on that would be great... Maybe heavier roller weights too will help?....I own mostly 4 stroke 80 BBK's and taking advantage of a 4 strokes torgue is easy for me...as they like to lug and pull.....where as a 2 stoke needs to rev to get into its powerband...
