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Post by drewbug22 on May 31, 2008 21:11:19 GMT -5
Does anybody know a good combination of a 70cc big bore kit and an exhaust that would match up with it?
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Post by 90GTVert on Jun 1, 2008 6:27:29 GMT -5
I used the MRP big bore and MRP exhaust. It's certainly not a race kit like some of the Polini stuff, but it is way faster than stock. Minarelli kits are made for 10 and 12mm wrist pins, you will need to know which yours is. If you have a 12mm, I would recommend getting a Wiseco wrist pin bearing. I was told by someone with a lot of experience that the wristpin bearings were a weak point. If you want it the Wiseco part # for 12mm is B1043. I used my stock carb, mines 17.5mm, if yours is smaller you may not be able to. No rejetting if you keep the stock air box. You can go with an aftermarket air filter and then upjet, but the improvements are said to be minimal. It's been as reliable as stock, but about 10mph faster cruise speed. You may also want to consider some red clutch springs and either red or blue main spring. The blue spring would let me keep my full top speed, and the red spring would lose a couple mph but take off faster... both are way better than stock for take-off. While you are in there, pick up an Iridium plug. My scoot had problems with starting when it was 50 degrees or below for some reason, stock or after mods, the iridium plug made it fire right up hot or cold.
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Post by footlong5 on Jun 1, 2008 6:54:42 GMT -5
where would be a good place to get the mrp big bore kit and the clutch springs
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Post by 90GTVert on Jun 1, 2008 6:57:08 GMT -5
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Post by drewbug22 on Jun 1, 2008 7:59:01 GMT -5
is there any way of knowing what size of kit you need meaning 10 or 12mm
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Post by 90GTVert on Jun 1, 2008 11:02:13 GMT -5
I'm not too sure about that. I got lucky and in Vento scooters certain years will have differnt sizes. Contact a seller and ask if no one here can tell you. I know one seller suggested I pull it apart and measure, but I spoke with Bart at extreme2strokes and he got me straight on the years of Vento's with each size. His business is gone now though.
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Post by motomech on Jun 3, 2008 10:39:55 GMT -5
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Post by drewbug22 on Jun 3, 2008 12:42:37 GMT -5
ok ill check it out
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Post by YellowScooter on Jun 6, 2008 12:51:43 GMT -5
2005 and newer use the 12mm pin. 2004 and older used a 10mm pin  An upgear will give a lower cruise RPM and a little more on top speed, but your takeoff will be similar to that of when it was stock. |
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Post by ryan_ott on Jun 10, 2008 17:03:56 GMT -5
2005 and newer use the 12mm pin. 2004 and older used a 10mm pin An upgear will give a lower cruise RPM and a little more on top speed, but your takeoff will be similar to that of when it was stock. Not 100% true, Mine is a 2003 and it had a 12mm crank. But mostly your correct with the years. |
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Post by drewbug22 on Jun 16, 2008 10:32:58 GMT -5
ok..ill figure it out sometime then
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