Ct200uex speed.

[bbrewer2005]

So I've got a ct200uex. Its got a predator 212 with a stage 1 kit, and a torque converter. I have the factory 50t rear sprocket and a 9t jackshaft sprocket on the converter for a 5.4x ratio.
In it's current configuration with my 220lb self, it will do 49-52 mph depending on wind and distance at wot. I've got it to 52mph once. It will typically do 48-50 with a long stretch of straight road depending on ambient temps. This is all tested with a GPS.

I just bought a 60t rear sprocket, and a vm22 mikuni carb. I'm also going to remove the governer. Any ideas on what my theoretical top speed should be with those two mods?
Think I should be able to do 55mph? I also have a 10t jackshaft gear I can use to play around with ratios.

 

[landuse]

So I've got a ct200uex. Its got a predator 212 with a stage 1 kit, and a torque converter. I have the factory 50t rear sprocket and a 9t jackshaft sprocket on the converter for a 5.4x ratio.
In it's current configuration with my 220lb self, it will do 49-52 mph depending on wind and distance at wot. I've got it to 52mph once. It will typically do 48-50 with a long stretch of straight road depending on ambient temps. This is all tested with a GPS.

I just bought a 60t rear sprocket, and a vm22 mikuni carb. I'm also going to remove the governer. Any ideas on what my theoretical top speed should be with those two mods?
Think I should be able to do 55mph? I also have a 10t jackshaft gear I can use to play around with ratios.

You will be going slower with that gear ratio. You are going from a 50/9 = 5.55 gear ratio to a 60/9 = 6.66 gear ratio. You will have more torque, but will sacrifice speed. The governor removal and carb will allow you to reach your top speed faster than it would have without those upgrades, but because of your lower gear ratio your top speed is still not going to be as fast as what it was with the higher ratio

 

[bbrewer2005]

Well, I'm not even able to hit the factory governer rpm with my current setup. I'm currently under geared for my 230lb self and the power level I'm at, I should have mentioned this in my first post. I was thinking that going 5.55 to 6.0 with the 60/10 setup, and removing the governor, would allow me to be able to get a few more mph with the extra torque multiplication and rpm. If that makes any sense. I'm not sure if does, that's why I was asking. Lol
If I could possibly pick up a few more mph with the 60/10, I may try the 60/9. Any thoughts given the current under geared factor?

Edit* I should also mention, I picked up about 4 or 5mph going from a 50/10 to my current 50/9.

I know there are calculators for determining gear ratios and theoretical top speed given an rpm with a standard clutch and jackshaft. Are there any calculators for those of us with torque converter? 30 series with a 6in driven pulley. I know it's a bit more tricky as they aren't static.

 

[bbrewer2005]

So I got the carb and 60t gear installed (9/60), as well as removed the governor. Im going 47mph when the valves start floating. So I only lost 1-3mph. But whoo boy did it make a huge difference. It just wants to keep going up top up until it hits valve float. A buddy's bike (Baja warrior) was a dead even match for me before, now I'm beating him by 3 or 4 bike lengths. The major downside is I can't go wide open off the line. It's a wheelie machine. Can't go wide open until 5 or 10mph leaning on the tank. Lol
Rod, cam, flywheel, and springs are next. If I can rev this to 6500-7000rpm, I should be able to do 55+.

 

[landuse]

Sounds good to me!!!!