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Post by 2strokd on Jul 6, 2010 17:00:19 GMT -5
I use heat and tap it off with a rubber mallet.
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Post by stepthrutuner on Jul 6, 2010 19:13:55 GMT -5
Or you could heat the gear and aggressively bump the end of the shaft that the gear will have to come off of against a board laying on concrete or asphalt (use inertia).
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Post by stepthrutuner on Jul 31, 2010 9:56:03 GMT -5
2002 Derbi Atlantis (Piaggio).... Pri.: 13/48 (3.69); Sec.: 14/46 (3.29). 12.14 overall.
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Post by 190mech on Aug 1, 2010 5:59:21 GMT -5
Reg,Ya got a 137/70-12 rear tire,what speed will she cruise at?
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Post by stepthrutuner on Aug 1, 2010 12:16:07 GMT -5
Did you mean 130/70? My stock tire is 120/70-12. Are you asking what the difference in circumference and rpms at crusing speed would be?
Ok. I figured it up I think. Circ. of 130 = 60.21"; Circ. of 120 = 58.48". Diff. of 1.73" or 1.73/58.48 = 2.96%. I'd like close to four times that. I really don't want to go much bigger on tire diam. and have to eliminate my little rear fender and have mud slung everywhere down there.
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Post by 190mech on Aug 1, 2010 16:10:10 GMT -5
Yea,I meant 130/70,was wanting to figure what your cruise RPM was with Brents calculator..  |
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Post by 2strokd on Aug 2, 2010 12:46:33 GMT -5
That calculator wont work with a cvt trans.
You can set that cvt up sixteen ways to Sunday and get all sorts of mixed results.
Not to mention what an over-range would do???
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Post by 90GTVert on Aug 2, 2010 13:03:21 GMT -5
The calc kinda sorta works for it. I take the final drive ratio and known RPM and tinker till I get my real world speed/RPM then stick diff tire diameters in there. I wish I could make it more CVT friendly, but it's kinda tricky as you pointed out. You'd need a tach on your clutch bell or something. lol
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Post by shakerdriver on Aug 19, 2010 13:06:05 GMT -5
hey guys i've got a 12.9ish:1 final gear with 130/90-10 tire. i'm just trying to get a little more speed out of it, right now it tops out about 32-34 with my 360lbs. frame on it. if i change the gear set to a 9:1 maybe, would that help me with my top speed? i should mention i'm riding an Aprilia rally 50 with a minarelli engine.
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Post by stepthrutuner on Aug 19, 2010 14:17:55 GMT -5
hey guys i've got a 12.9ish:1 final gear with 130/90-10 tire. i'm just trying to get a little more speed out of it, right now it tops out about 32-34 with my 360lbs. frame on it. if i change the gear set to a 9:1 maybe, would that help me with my top speed? i should mention i'm riding an Aprilia rally 50 with a minarelli engine. I could not recommend that you change your stock gearing 30% toward less pulling power. Hills would kill your little scooter with that drastic of a gearing change. I think you would be better off tuning/modifying the motor for more torque and/or power and doing a little tranny tuning to make yourself a 40 mph machine. Edit: There is not a lot of difference between the cost of a gearing change and the cost of a good but lower end big bore kit and they are not that hard to install either. |
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Post by 90GTVert on Aug 19, 2010 14:33:47 GMT -5
I agree. I beleive power would do more for you right now than gearing. BBK, CVT tuning, then maybe look for a gearing change. If you were 150lbs and it was revved out, it might be a different story.
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Post by 2strokd on Aug 22, 2010 17:25:01 GMT -5
PM sent
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Post by Thebatman on Nov 20, 2010 13:08:29 GMT -5
hey, what ever happened to this thread?  i have 10.5-1 ratio........... |
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Post by 190mech on Nov 20, 2010 17:38:45 GMT -5
Hey theBatman,Get your engine running strong,tune the CVT,THEN decide if gears are needed..10.5 sounds wonderful for a 70-90cc scoot |
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Post by Thebatman on Nov 21, 2010 22:16:22 GMT -5
hey 190, thanks for the reply.... someone is buying all parts that i may need and i just wasnt trying to miss out on making a whole package.... well crap, z has a 8.5;1, figured my zx would need/want that also... :twisted:
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