RIM/Max IV sprockets and gear ratio

[AllenCordier]

Has anyone experimented with changing gear ratio between transmission (15 tooth sprocket) and lower rear axle (34 tooth sprocket)? This gives a 2.26 :1 ratio. That was at the time when the machine was equipt with a 2 stroke engine. Now with a 4 stroke, i have torque but not much top speed. I am going to go with a 30 tooth sprocket on the rear drive axle to give me a 2.00 :1 ratio. Hopefully i have enough for tensioner adjustment, since that sprocket will be smaller. Ive also changed my secondary clutch to a smaller 9". Any thoughts on this?

[john swenson]

not sure what your saying ... but any sprockets changed on the wheel axles needs to be the same size on all three .or changing any on the trans or jackshaft have to be the same for both sides of the machine . otherwise you get chain windup or 3 wheels on one side turning faster than the other side . maybe you know this ...so good luck .let us know how it turns out . jboy va.

[ARGOJIM]

You will be fine but may have to loose a link or so. I put 28's in my racer for short tracks but we don't do them anymore so I have to go down more for the big tracks.

[AllenCordier]

http://http://www.6x6world.com/galle...3-diagram.html

[AllenCordier]

In the diagram, these are the sprockets im referring to. Im only changing the main drive sprockets from the transmission which originally has 34 teeth to a 30 tooth sprocket. This will be done on both sides. All the rest of the sprockets will remain the same size so there wont be any binding. Jim, is this the sprocket you referred to changing to a 28 tooth for short track? Thanks for they replies.

[AllenCordier]

[AllenCordier]

[ARGOJIM]

Yes I dropped the 34 tooth to 28, 30 would probably be a good 4stroke trail friendly gear, the 34 were used til the end of Max including the splined units which I would assume for track use reasons, none are speed demons.

[AllenCordier]

Great to hear! Thanks for the information. I appreciate it!