66cc bbk. which gears would be best for me to get

[iceman77]

i just a got a 66cc bbk. what gears do you guys think i should run.

thanks in advance

[sanjuro]

More info needed like pipe, carb, type of bike, variator brand and weights, and your weight. You only get out what you put in.

[iceman77]

More info needed like pipe, carb, type of bike, variator brand and weights, and your weight. You only get out what you put in.

i weigh 185.
stock pipe derestricted.
stock variator w/ stock weights
stock carb. (i have a #78 jet in it right now but thought maybe it should be bigger. if so what size do you think?
bike is an 2001 elite 50

[sanjuro]

Doesn't sound like your setup is too aggressive. I would stay in the 10:1 or 9:1 gear ratio range. Anything less, and I don't think you'll have the power to pull the topend. Better off getting excellent acceleration and 50-55 mph in a hurry.

[iceman77]

Doesn't sound like your setup is too aggressive. I would stay in the 10:1 or 9:1 gear ratio range. Anything less, and I don't think you'll have the power to pull the topend. Better off getting excellent acceleration and 50-55 mph in a hurry.

I was hoping for 50 mph but wasn't sure it was possible w/ my setup.
and i would much rather get there quick.
thanks for the help

[Wheelman-111]

Greetings:

Your Main is thr right size for 50cc. Stock airbox 85 minimum. 90-ish or more for a pod filter.

9:1will run ~58 with enough power. Taller gears only sacrifice 0-10 if the variator is tuned correctly., but 8.4s probably won't be any faster except downhill.

[iceman77]

Greetings:

Your Main is thr right size for 50cc. Stock airbox 85 minimum. 90-ish or more for a pod filter.

9:1will run ~58 with enough power. Taller gears only sacrifice 0-10 if the variator is tuned correctly., but 8.4s probably won't be any faster except downhill.

so should i go w/ 9:1 gears?

[sanjuro]

If you live in a really hilly area I would do the 10:1 gears, but if most of your travels are on the flats, then 9:1 would be better.

[iceman77]

If you live in a really hilly area I would do the 10:1 gears, but if most of your travels are on the flats, then 9:1 would be better.

there are a lot of hills here. so 10:1 would probably be best.
do you think 50 mph is possible w/ my set up and 10:1 gears?

[sanjuro]

I've done 58 mph with 10:1 gears using a MHR 72cc setup so 50+mph should be easy for you to do. You'll love that gearing when the road is twisty and hilly.

[iceman77]

I've done 58 mph with 10:1 gears using a MHR 72cc setup so 50+mph should be easy for you to do. You'll love that gearing when the road is twisty and hilly.

sweet. thanks for the info.
twisty and hilly are basiclly every road around here

[bonesv]

Why go to the trouble of the BBK and gears without modding the rest of the drive system? I found much better performance using a heavier torque spring and comparable clutch springs to help transfer the power to the wheel. Also, a better help than that was the polini (or other aftermarket) variator/front pulley and lighter, or stock, rollers. I figured I'd get all I could out of it. A performance exhaust almost definitely requires an increase in fuel intake, be careful about it. I Highly Recommend a tach/temp gauge to get an idea of what is going on, and learning about tuning a 2-stroke motor instead of coming here all the time with my questions and problems. Just a few suggestions for 'ya, maybe you already thought about all that. There's a lot of good experience on this site. Good Luck. Happy Trails!

[sanjuro]

Personally, I would get the taller gearing done first, and then get a better variator and tune the rollers to suit the gearing. Also, doing one thing at a time allows you to learn and see the differences in the setup. Eventually working your way up to a full array of complementary mods.

[maddog]

yep, 9 to 1 gears plus other tricks and you will ride 50mph all day long, i miss those days-all 29,000 mi. of them

[iceman77]

Why go to the trouble of the BBK and gears without modding the rest of the drive system? I found much better performance using a heavier torque spring and comparable clutch springs to help transfer the power to the wheel. Also, a better help than that was the polini (or other aftermarket) variator/front pulley and lighter, or stock, rollers. I figured I'd get all I could out of it. A performance exhaust almost definitely requires an increase in fuel intake, be careful about it. I Highly Recommend a tach/temp gauge to get an idea of what is going on, and learning about tuning a 2-stroke motor instead of coming here all the time with my questions and problems. Just a few suggestions for 'ya, maybe you already thought about all that. There's a lot of good experience on this site. Good Luck. Happy Trails!

I know about motors just not much about 2 strokes yet. that's why i joined this forum. the guys on this forum know a lot more than i do about 2 strokes so i figured if i had a question or problem i could ask them.